Bombardier And Hitachi Come Up With Similar Car Lengths
In an article in the October 2019 Edition of Modern Railways, which is entitled EMR Kicks Off New Era, more details of the new Hitachi bi-mode trains for East Midlands Railway are given.
This is said.
The first train is required to be available for testing in December 2021 with service entry between April and December 2022.
The EMR bi-modes will be able to run at 125 mph in diesel mode, matching Meridian performance in a step-up from the capabilities of the existing Class 80x units in service with other franchises. They will have 24 metre vehicles (rather than 26 metres), a slightly different nose to the ‘800s’ and ‘802s’, and will have four diesel engines rather than three.
I will examine this extract further.
Car Length
If you look at Bombardier’s Class 720 train, the five-car trains are 122 metres long, giving a 24 metre car length.
The ten car Class 720 train is 243 metres long, which is a similar length to three Class 360 trains running as a twelve-car train and only a few metres longer than three Class 321 trains running together.
This must be good for Greater Anglia’s train renewal, as it will minimise expensive platform lengthening.
It looks to me, that two of the new EMR InterCity trains running as a pair will be of a similar length to a twelve-car formation of Class 360 trains.
Consider.
- As trains for EMR InterCity and EMR Electrics will share platforms at some stations, platform lengthening will again be minimised.
- If you divide 240 by 10, you usually get the same answer of 24.
- But if 26 metre cars were to be used, a nine-car EMR bi-mode would be 234 meres long. and two five-car trains working together would be 260 metres long.
- Twelve-car Class 700 trains are 242.6 metres long.
These points lead me to believe that 24 metre cars are a better length for the Hitachi trains as ten-car formations are the same length as twelve-car formations of many of the UK’s older multiple units.
Maximum Speed On Diesel
Consider.
- Various places on the Internet say that the maximum speed on diesel of a Class 800 train is 118 mph.
- Maximum speed of a train is probably more determined by the aerodynamic drag of the train, which is proportional to the square of the speed.
- So if a Class 800 train needs 3 * 560 kW to maintain 118 mph, it will need 1885 kW or 12.2 percent more power to maintain 125 mph
- A fourth 560 kW diesel engine will add 33.3 percent more power.
This rough calculation shows that a fourth engine will allow the train to more than attain and hold 125 mph on the same track where a Class 800 train can hold 118 mph.
But adding a fourth engine is a bit of a crude solution.
- It will add more dead weight to the train.
- It will be useful when accelerating the train, but probably not necessary.
- It will add more noise under the train. Especially, if four cars had engines underneath.
- It could cause overheating problems, which have been reported on the current trains.
I’ll return to this later.
Aerodynamics
Power required to maintain 125 mph can be reduced in another much more subtle way; by improving the aerodynamics.
- I have stood on a platform, as an Aventra has silently passed at speed. It is very quiet, indicating that the aerodynamics are good.
- But then Bombardier are an aerospace company as well as a train builder.
I’ve no idea if a Bombardier Class 720 train has less aerodynamic drag, than a Hitachi Class 800 train, but I’m sure that aerodynamic wizards from Formula One could improve the aerodynamics of the average modern train.
Could better aerodynamics explain why the EMR InterCity bi-modes are stated to have a different nose?
Look at the noses on these Spanish High Speed trains, which were built by Talgo!
Are they more aerodynamic? Do they exert a higher down-force making the train more stable?
They certainly are different and they obviously work., as these are very fast trains.
Incidentally, these trains, are nicknamed pato in Spanish, which means duck in English.
Aerodynamic drag is proportional to a drag coefficient for the object and the square of the speed.
Let’s assume the following.
- The drag coefficient for the current train is d.
- The drag coefficient for the train with the aerodynamic nose is a.
- The terminal velocity of the train with the aerodynamic nose is v.
If the current Class 800 train travels at 118 mph on full power of 1680 kW, what speed would the train with an improved aerodynamic nose do on the same power, for various values of a?
If the new nose gives a five percent reduction in aerodynamic drag, then a = 0.95 * d, then the maximum speed of the train will be given by this formula
d * 118 * 118 = .0.95 * d * v* v
Solving this gives a speed of 121 mph.
Completing the table, I get the following.
- A one percent reduction in drag gives 119 mph
- A two percent reduction in drag gives 119 mph
- A three percent reduction in drag gives 120 mph
- A four percent reduction in drag gives 120 mph
- A five percent reduction in drag gives 121 mph
- A six percent reduction in drag gives 122 mph
- A seven percent reduction in drag gives 122 mph
- An eight percent reduction in drag gives 123 mph
- A nine percent reduction in drag gives 124 mph
- A ten percent reduction in drag gives 124 mph
- An eleven percent reduction in drag gives 125 mph
I can certainly understand why Talgo have developed the duck-like nose.
The conclusion is that if you can achieve an eleven percent reduction in drag over the current train, then with the same installed power can raise the speed from 118 mph to 125 mph.
Why Have A Fourth Engine?
If aerodynamics can make a major contribution to the increase in speed under diesel, why add a fourth engine?
- It might be better to fit four slightly smaller engines to obtain the same power.
- It might be better to put a pair of engines under two cars, rather than a single engine under four cars, as pairs of engines might share ancillaries like cooling systems.
- Extra power might be needed for acceleration.
- Four engines gives a level of redundancy, if only three are needed to power the train.
I wouldn’t be surprised to find out, that Hitachi are having a major rethink in the traction department.
Will The Trains Have Regenerative Braking To Batteries?
I would be very surprised if they don’t, as it’s the only sensible way to do regenerative braking on diesel power.
Will The Trains Be Built Around An MTU Hybrid PowerPack?
This or something like it from Hitachi’s diesel engine supplier; MTU, is certainly a possibility and it would surely mean someone else is responsible for all the tricky software development.
It would give the following.
- Regenersative braking to batteries.
- Appropriate power.
- Easier design and manufacture.
- MTU would probably produce the sophisticated power control system for the train.
- MTU could probably produce a twin-engined PowerPack
Rolls Royce MTU and Hitachi would all add to the perception of the train.
I would rate Hitachi using MTU Hybrid PowerPacks quite likely!
Would Two Pairs Of Engines Be Better?
The current formation of a five-car Class 800 train is as follows.
DPTS-MS-MS-MC-DPTF
Note.
- Both driver cars are trailers.
- The middle three cars all have generators, that are rated at 560 kW for a Class 800 train and 700 kW for a Class 802 train.
- Take a trip between Paddington and Oxford and you can feel the engines underneath the floor.
- The engines seem to be reasonably well insulated from the passenger cabin.
The system works, but could it be improved.
If I’m right about the aerodynamic gains that could be possible, then it may be possible to cruise at 125 mph using a power of somewhere around 1,800 kW or four diesel generators of 450 kW each.
Putting a diesel generator in four cars, would mean one of the driver cars would receive an engine, which might upset the balance of the train.
But putting say two diesel generators in car 2 and car 4 could have advantages.
- A Class 800 train has a fuel capacity of 1,300 litres, which weighs 11.06 tonnes. and is held in three tanks. Would train dynamics be better with two larger tanks in car 2 and 4?
- Could other ancillaries like cooling systems be shared between the two engines?
- Could a substantial battery pack be placed underneath car 3, which now has no engine and no fuel tank?
- As the engines are smaller will they be easier to isolate from the cabin?
The only problem would be fitting two generators underneath the shorter 24 metre car.
What size of battery could be fitted in car 3?
- According to this datasheet on the MTU web site, the engine weighs between five and six tonnes.
- I think this weight doesn’t include the generator and the cooling systems.
- Removing the fuel tank would save 3.7 tonnes
I suspect that a ten tonne battery could replace the diesel engine and its support systems in car 3..
On current battery energy densities that would be a battery of around 1000 kWh.
In How Much Power Is Needed To Run A Train At 125 mph?, I estimates that an electric Class 801 train needs 3.42 kWh per vehicle mile to maintain 125 mph.
This would give a range of almost sixty miles on battery power.
The battery would also enable.
- Regenerative braking to batteries, which saves energy at station stops.
- Diesel engines would not need to be run in stations or sensitive areas.
- Battery power could be used to boost acceleration and save diesel fuel.
You can almost think of the battery as an auxiliary engine powered by electrification and regenerative braking, that can also be topped up from the diesel generators.
It should also be noted, that by the time these trains enter service, the Midland Main Line will be electrified as far as Kettering and possibly Market Harborough.
This will enable the following.
- Trains will leave the electrification going North with a full battery.
- As Nottingham is less than sixty miles from Kettering and the trains will certainly have regeneratinve braking, I would not be surprised to see Northbound services to Nottingham being almost zero-carbon.
- A charging station at Nottingham would enable Southbound services to reach the electrification, thus making these services almost zero-carbon.
- Trains would be able to travel between Derby and Chesterfield, which is only 23 miles, through the World Heritage Site of the Derwent Valley Mills, on battery power.
- Corby and Melton Mowbray are just 26 miles apart, so the bi-mode trains could run a zero-carbon service to Oakham and Melton Mowbray.
- Trains could also run between Corby and Leicester on battery power.
- If and when the Northern end of the route is electrified between Sheffield and Clay Cross North Junction in conjunction with High Speed Two, the electrification gap between Clay Cross North Junction and Market Harborough will be under seventy miles, so the trains should be able to be almost zero carbon between London and Sheffield.
It does appear that if a battery the same weight as a diesel generator, fuel tank and ancillaries is placed in the middle car, the services on the Midland Main Line will be substantially zero-carbon.
What Would Be The Size Of |The Diesel Engines?
If the battery can be considered like a fifth auxiliary engine, I would suspect that the engines could be much smaller than the 560 kWh units in a Class 800 train.
Improved aerodynamics would also reduce the power needed to maintain 125 mph.
There would also be other advantages to having smaller engines.
- There would be less weight to accelerate and lug around.
- The noise from smaller engines would be easier to insulate from passengers.
- Engines could be used selectively according to the train load.
- Engines might be less prone to overheating.
The mathematics and economics will decide the actual size of the four engines.
Earlier, I estimated that a 10-11 % decrease in the trains aerodynamic drag could enable 124-5 mph with 1680 kW.
So if this power was provided by four engines instead of three, they would be 420 kW engines.
Conclusion
The Hitachi bi-modes for East Midlands Railway will be very different trains, to their current Class 80x trains.
HS2 Railway To Be Delayed By Up To Five Years
The title of this post is the same as that of this article on the BBC.
These first few paragraphs indicate the current situation.
The first phase of the HS2 high-speed railway between London and Birmingham will be delayed by up to five years, Transport Minister Grant Shapps says.
That section of the line was due to open at the end of 2026, but it could now be between 2028 and 2031 before the first trains run on the route.
HS2’s total cost has also risen from £62bn to between £81bn and £88bn, but Mr Shapps said he was keeping an “open mind” about the project’s future.
The second phase has also been delayed.
What are the short term consequences of this delay in the building of High Speed Two?
- No Capacity Increase Between London And Birmingham., until three or five years later.
- Capacity increases to Glasgow, Hull, Leeds, Liverpool, Manchester, Nottingham and Preston will probably be five years or more later.
Are there any other things we can do to in the meantime to make the shortfall less damaging to the economy?
East Coast Main Line
Much of the East Coast Main Line (ECML) has been designed for 140 mph running. Wikipedia puts it like this..
Most of the length of the ECML is capable of 140 mph subject to certain infrastructure upgrades.
Wikipedia also says that Greengauge 21 believe that Newcastle and London timings using the shorter route could be comparable to those using HS2.
Track And Signalling Improvements
There are a number of improvements that can be applied to the ECML, with those at the Southern end summed up by this paragraph from Wikipedia.
Increasing maximum speeds on the fast lines between Woolmer Green and Dalton-on-Tees up to 140 mph (225 km/h) in conjunction with the introduction of the Intercity Express Programme, level crossing closures, ETRMS fitments, OLE rewiring and the OLE PSU – est. to cost £1.3 billion (2014). This project is referred to as “L2E4” or London to Edinburgh (in) 4 Hours. L2E4 examined the operation of the IEP at 140 mph on the ECML and the sections of track which can be upgraded to permit this, together with the engineering and operational costs.
Currently, services between London and Edinburgh take between twenty and forty minutes over four hours.
Who would complain if some or even all services took four hours?
To help the four hour target to be achieved Network Rail are also doing the following.
- Building the Werrington Dive-under.
- Remodelling the station throat at Kings Cross.
- Adding extra tracks between Huntingdon and Woodwalton.
- Devising a solution for the flat junction at Newark.
Every little helps and all these improvements will allow faster and extra services along the ECML.
Obviously, running between London and Edinburgh in four hours has implications for other services.
In Changes Signalled For HS2 Route In North, I said this.
Currently, the fastest non-stop trains between London and Doncaster take a few minutes over ninety minutes. With 140 mph trains, I think the following times are easily possible.
- London and Doncaster – 80 minutes
- London and Hull – A few minutes over two hours, running via Selby.
- London and Leeds – A few minutes less than two hours, running on the Classic route.
For comparison High Speed Two is quoting 81 minutes for London Euston and Leeds, via Birmingham and East Midlands Hub.
I suspect that North of Doncaster, improving timings will be more difficult, due to the slower nature of the route, but as services will go between Edinburgh and London in four hours, there must be some improvements to be made.
- Newcastle – Current time is 170 minutes, with High Speed Two predicting 137 minutes. My best estimate shows that on an improved ECML, times of under 150 minutes should be possible.
- York – Current time is 111 minutes, with High Speed Two predicting 84 minutes. Based on the Newcastle time, something around 100 minutes should be possible.
In Wikipedia, Greengauge 21 are quoted as saying.
Upgrading the East Coast Main Line to 140 mph operation as a high priority alongside HS2 and to be delivered without delay. Newcastle London timings across a shorter route could closely match those achievable by HS2.
My estimate shows a gap of thirteen minutes, but they have better data than I can find on the Internet.
Filling Electrification Gaps East Of Leeds And Between Doncaster And Sheffield
In Changes Signalled For HS2 Route In North, I said this.
These are the lines East of Leeds.
- A connection to the East Coast Main Line for York, Newcastle and Edinburgh.
- An extension Eastwards to Hull.
These would not be the most expensive sub-project, but they would give the following benefits, when they are upgraded.
- Electric trains between Hull and Leeds.
- Electric trains between Hull and London.
- Electric access to Neville Hill Depot from York and the North.
- An electric diversion route for the East Coast Main Line between York and Doncaster.
- The ability to run electric trains between London and Newcastle/Edinburgh via Leeds.
Hull and Humberside will be big beneficiaries.
In addition, the direct route between Doncaster and Sheffield should be electrified.
This would allow the following.
- LNER expresses to run on electricity between London and Sheffield, if they were allowed to run the route.
- Sheffield’s tram-trains could reach Doncaster and Doncaster Sheffield Airport.
A collateral benefit would be that it would bring 25 KVAC power to Sheffield station.
Better Use Of Trains
LNER are working the trains harder and will be splitting and joining trains, so that only full length trains run into Kings Cross, which will improve capacity..
Capacity might also be increased, if Cambridge, Kings Lynn and Peterborough services were run with 125 mph or even 140 mph trains. GWR is already doing this, to improve efficiency between Paddington and Reading.
Faster Freight Trains
Rail Operations Group has ordered Class 93 locomotives, which are hybrid and capable of hauling some freight trains at 110 mph.
Used creatively, these might create more capacity on the ECML.
Could the East Coast Main Line be the line that keeps on giving?
Especially in the area of providing faster services to Lincoln, Hull, Leeds, Huddersfield,Bradford Newcastle and Edinburgh.
Conclusion On East Coast Main Line
There is a lot of scope to create a high capacity, 140 mph line between London and Edinburgh.
An Upgraded Midland Main Line
Plans already exist to run 125 mph bi-mode Hitachi trains on the Midland Main Line between London and Leicester, Derby, Nottingham and Sheffield.
But could more be done in the short term on this line.
Electrification Between Clay Cross North Junction And Sheffield
This 15.5 mile section of the Midland Main Line will be shared with High Speed Two.
It should be upgraded to High Speed Two standard as soon as possible.
This would surely save a few minutes between London and Sheffield.
140 mph Running
The Hitachi bi-modes are capable of 140 mph, if the signalling is digital and in-cab.
Digital signalling is used by the Class 700 trains running on Thameslink, so would there be time savings to be made by installing digital signalling on the Midland Main Line, especially as it would allow 140 mph running, if the track was fast enough.
Extension From Sheffield To Leeds Via New Stations At Rotherham And Barnsley
Sheffield and Transport for the North are both keen on this project and it would have the following benefits.
- Rotherham and Barnsley get direct trains to and from London.
- A fast service with a frequency of four trains per hour (tph) could run between Leeds and Sheffield in a time of twenty-eight minutes.
This extension will probably go ahead in all circumstances.
Use Of The Erewash Valley Line
The Erewash Valley Line is a route, that connects the Midland Main Line to Chesterfield and Sheffield, by bypassing Derby.
It has recently been upgraded and from my helicopter, it looks that it could be faster than the normal route through Derby and the World Heritage Site of the Derwent Valley Mills.
The World Heritage Site would probably make electrification of the Derby route difficult, but could some Sheffield services use the relatively straight Erewash Valley Line to save time?
Faster Services Between London And Sheffield
When East Midlands Railway receive their new Hitachi bi-mode trains, will the company do what their sister company; Greater Anglia is doing on the London and Norwich route and increase the number of hourly services from two to three?
If that is done, would the third service be a faster one going at speed, along the Erewash Valley Line?
I suspect that it could have a timing of several minutes under two hours.
Conclusion On An Upgraded Midland Main Line
There are various improvements and strategies, that can be employed to turn the Midland Main Line into a High Speed Line serving Leicester, Derby, Nottingham and Sheffield.
West Coast Main Line
The West Coast Main Line is not such a fruitful line for improvement, as is the East Coast Main Line.
Digital signalling, 140 mph running and faster freight trains, may allow a few more trains to be squeezed into the busy main line.
Increasing Capacity Between London and Birmingham New Street
I’ve seen increased capacity between London and Birmingham quoted as one of the reasons for the building of High Speed Two.
Currently, both Virgin Trains and West Midlands Trains, have three tph between London and Birmingham New Street.
- This is probably not enough capacity.
- The line between Birmingham New Street and Coventry stations is probably at capacity.
These points probably mean more paths between London and Birmingham are needed.
High Speed Two is planned to provide the following services between London and Birmingham after Phase 2 opens.
- Three tph – London and Birmingham Curzon Street stations via Old Oak Common and Birmingham Interchange (2 tph)
- Fourteen tph – London and Birmingham Interchange via Old Oak Common.
That is a massive amount of extra capacity between London and Birmingham.
- It might be possible to squeeze another train into each hour.
- Trains could be lengthened.
- Does Birmingham New Street station have the capacity?
But it doesn’t look like the West Coast Main Line can provide much extra capacity between London and Birmingham.
Increasing Capacity Between London and Liverpool Lime Street
Over the last couple of years, Liverpool Lime Street station has been remodelled and the station will now be able to handle two tph from London, when the timetable is updated in a year or so.
Digital signalling of the West Coast Main Line would help.
Increasing Capacity Between London and Manchester Piccadilly
Manchester Piccadilly station uses two platforms for three Virgin Trains services per hour to and from London.
These platforms could both handle two tph, so the station itself is no barrier to four tph between London and Manchester.
Paths South to London could be a problem, but installing digital signalling on the West Coast Main Line would help.
Conclusion On The West Coast Main Line
Other improvements may be needed, but the major update of the West Coast Main Line, that would help, would be to use digital signalling to squeeze more capacity out of the route.
The Chiltern Main Line
Could the Chiltern Main Line be used to increase capacity between London and Birmingham?
Currently, there are hourly trains between Birmingham Moor Street and Snow Hill stations and London.
As each train has about 420 seats, compared to the proposed 1,100 of the High Speed Two trains, the capacity is fairly small.
Increasing capacity on the route is probably fairly difficult.
Digital Signalling
This could be used to create more paths and allow more trains to run between London and Bitmingham.
Electrification
The route is not electrified, but electrifying the 112 mile route would cause massive disruption.
Capacity At Marylebone Station
Marylebone station probably doesn’t have the capacity for more rains.
Conclusion On The Chiltern Main Line
I don’t think that there is much extra capacity available on the Chiltern Main Line between London and Birmingham.
Conclusion
I have looked at the four main routes that could help make up the shortfall caused by the delay to High Speed Two.
- Planned improvements to the East Coast Main Line could provide valuable extra capacity to Leeds and East Yorkshire.
- The Midland Main Line will increase capacity to the East Midlands and South Yorkshire, when it gets new trains in a couple of years.
- Planned improvements to the West Coast Main Line could provide valuable extra capacity to North West England.
- The Chiltern Main Line probably has little place to play.
As Birmingham has been planning for High Speed Two to open in 2026, some drastic rethinking must be done to ensure that London and Birmingham have enough rail capacity from that date.
Hydrogen Trains To Be Trialled On The Midland Main Line
This article on Railway Gazette is entitled Bimode And Hydrogen Trains As Abellio Wins Next East Midlands Franchise.
Abellio will be taking over the franchise in August this year and although bi-mode trains were certain to be introduced in a couple of years, the trialling of hydrogen-powered trains is a surprise to me and possibly others.
This is all that is said in the article.
Abellio will also trial hydrogen fuel cell trains on the Midland Main Line.
It also says, that the new fleet will not be announced until the orders are finalised.
In this post, I’m assuming that the hydrogen trial will be performed using the main line trains.
Trains for the Midland Main Line will need to have the following properties
- 125 mph on electric power
- 125 mph on diesel power
- Ability to go at up to 140 mph, when idigital n-cab signalling is installed and the track is improved.
- UK gauge
- Ability to run on hydrogen at a future date.
I think there could be three types of train.
- A traditional bi-mode multiple unit, with underfloor engines like the Hitachi Class 800 series, is obviously a possibility.
- An electrical multiple unit, where one driving car is replaced by a bi-mode locomotive with appropriate power.
- Stadler or another manufacturer might opt for a train with a power pack in the middle.
The second option would effectively be a modern InterCity 225.
- South of Kettering, electricity would be used.
- North of Kettering, diesel would be used
- Hydrogen power could replace diesel power at some future date.
- Design could probably make the two cabs and their driving desks identical.
- The locomotive would be interchangeable with a driver car.
Bi-modes would work most services, with electric versions working to Corby at 125 mph.
Which manufacturer has a design for a 125 mph, hydrogen-powered train?
Alstom
Alstom have no 125 mph UK multiple unit and their Class 321 Hydogen train, is certainly not a 125 mph train and probably will still be under development.
Bombardier
In Mathematics Of A Bi-Mode Aventra With Batteries, I compared diesel and hydrogen-power on bi-mode Aventras and felt that hydrogen could be feasible.
In that post, I wrote a section called Diesel Or Hydrogen Power?, where I said this.
Could the better ambience be, because the train doesn’t use noisy and polluting diesel power, but clean hydrogen?
It’s a possibility, especially as Bombardier are Canadian, as are Ballard, who produce hydrogen fuel-cells with output between 100-200 kW.
Ballard’s fuel cells power some of London’s hydrogen buses.
The New Routemaster hybrid bus is powered by a 138 kW Cummins ISBe diesel engine and uses a 75 kWh lithium-ion battery, with the bus being driven by an electric motor.
If you sit in the back of one of these buses, you can sometimes hear the engine stop and start.
In the following calculations, I’m going to assume that the bi-mode |Aventra with batteries has a power source, that can provide up to 200 kW, in a fully-controlled manner
Ballard can do this power output with hydrogen and I’m sure that to do it with a diesel engine and alternator is not the most difficult problem in the world.
So are Bombardier designing the Bi-Mode Aventra With Batteries, so that at a later date it can be changed from diesel to hydrogen power?
All an Aventra needs to run is electricity and the train, the onboard staff and passengers don’t care whether it comes from overhead wires, third-rail, batteries, diesel or hydrogen.
Bombardier also have the technology for my proposed locomotive-based solution, where one driver-car of an Aventra is replaced by what is effectively a locomotive.
If Bombardier have a problem, it is that they have no small diesel train to replace Abellio’s small diesel trains. Could the longer services use the bi-mode Aventras and the shorter ones Aventras with battery power?
CAF
CAF probably have the technology, but there would be a lot of development work to do.
Hitachi
Hitachi have the bi-mode trains in the Class 802 trains, but haven’t as yet disclosed a hydrogen train.
Siemens
They’ve made a few noises, but I can’t see them producing a bi-mode train for 2022.
Stadler
In a few weeks time, I will be having a ride in a Stadler-built Class 755 train, run by Abellio Greater Anglia.
The Class 755 train is a bi-mode 100 mph train, from Stadler’s Flirt family.
Could it be stretched to a 125 mph train?
- Stadler have built 125 mph electric Flirts.
- It is my view, that Stadler have the knowledge to make 125 mph trains work.
- Flirts are available in any reasonable length.
- I’ve read that bi-mode and electric Flirts are very similar for drivers and operators.
These could work the Midland Main Line.
If the mainline version is possible, then Abellio could replace all their smaller diesel trains with appropriate Class 755 trains, just as they will be doing in East Anglia.
Stadler with the launch of the Class 93 locomotive, certainly have the technology for a locomotive-based solution.
East Midlands Railway would be an all-Stadler Flirt fleet.
As to hydrogen, Stadler are supplying hydrogen-powered trains for the Zillertalbahn, as I wrote in Zillertalbahn Orders Stadler Hydrogen-Powered Trains.
Talgo
Talgo could be the joker in the pack. They have the technology to build 125 mph bi-mode trains and are building a factory in Scotland.
My Selection
I think it comes down to a straight choice between Bombardier and Stadler.
It should also be noted, that Abellio has bought large fleets from both manufacturers for their franchises in the UK.
Zero-Carbon Pilots At Six Stations
This promise is stated in the franchise.
Once the electrification reaches Market Harborough in a couple of years, with new bi-mode trains, running on electricity, the following stations will not see any passenger trains, running their diesel engines.
- St. Pancras
- Luton Airport Parkway
- Luton
- Bedford
- Wellingborough
- Kettering
- Corby
- Market Harborough
These are not pilots, as they have been planned to happen, since the go-ahead for the wires to Market Harborough.
Other main line stations include.
- Beeston
- Chesterfield
- Derby
- East Midlands Parkway
- Leicester
- Long Eaaton
- Loughborough
- Nottingham
- Sheffield
Could these stations be ones, where East Midlands Railway will not be emitting any CO2?
For a bi-mode train to be compliant, it must be able to pass through the station using battery power alone.
- As the train decelerates, it charges the onboard batteries, using regernerative braking.
- Battery power is used whilst the train is in the station.
- Battery power is used to take the train out of the station.
Diesel power would only be used well outside of stations.
How would the trains for the secondary routes be emission-friendly?
- For the long Norwich to Derby and Nottingham to Liverpool routes, these would surely be run by shorter versions of the main line trains.
- For Stadler, if secondary routes were to be run using Class 755 trains, the battery option would be added, so that there was no need to run the diesel engines in stations.
- For Bombardier, they may offer battery Aventras or shortened bi-modes for the secondary routes, which could also be emission-free in stations.
- There is also the joker of Porterbrook’s battery-enhaced Class 350 train or BatteryFLEX.
I think that with the right rolling-stock, East Midlands Railway, could be able to avoid running diesel engines in all the stations, where they call.
Why Are Abellio Running A Hydrogen Trial?
This is a question that some might will ask, so I’m adding a few reasons.
A Train Manufacturer Wants To Test A Planned Hydrogen Train
I think that it could be likely, that a train manufacturer wants to trial a hydrogen-powered variant of a high-speed train.
Consider.
- The Midland Main Line is about 160 miles long.
- A lot of the route is quadruple-track.
- It is a 125 mph railway for a proportion of the route.
- It has only a few stops.
- It is reasonably straight with gentle curves.
- Part of the route is electrified.
- It is connected to London at one end.
In my view the Midland Main Line is an ideal test track for bi-mode high speed trains.
A Train Manufacturer Wants To Sell A Fleet Of High Speed Trains
If a train manufacturer said to Abellio, that the fleet of diesel bi-mode trains they are buying could be updated to zero-carbon hydrogen bi-modes in a few years, this could clinch the sale.
Helping with a trial, as Abellio did at Manningtree with Bombardier’s battery Class 379 train in 2015, is probably mutually-beneficial.
The Midland Main Line Will Never Be Fully Electrified
I believe that the Midland Main Line will never be fully-electrified.
- The line North of Derby runs through the Derwent Valley Mills World Heritage Site. Would UNESCO allow electrification?
- I have been told by drivers, that immediately South of Leicester station, there is a section, that would be very difficult to electrify.
- Some secondary routes like Corby to Leicester via Oakham might be left without electrification.
But on the other hand some sections will almost certainly be electrified.
- Around Toton, where High Speed Two crosses the Midland Main Line and the two routes will share East Midlands Hub station.
- Between Clay Cross North Junction and Sheffield, where the route will be shared with the Sheffield Spur of High Speed Two.
- The Erewash Valley Line, if High Speed Two trains use that route to Sheffield.
The Midland Main Line will continue to need bi-mode trains and in 2040, when the Government has said, that diesel will not be used on UK railways,
It is my view, that to run after 2040, there are only two current methods of zero-carbon propulsion; on the sections without overhead electrification battery or hydrogen power.
So we should run trials for both!
Abellio Know About Hydrogen
Abellio is Dutch and after my trip to the Netherlands last week, I wrote The Dutch Plan For Hydrogen, which describes how the Dutch are developing a green hydrogen economy, where the hydrogen is produced by electricity generated from wind power.
So by helping with the trial of hydrogen bi-mode trains on the Midland Main Line, are Abellio increasing their knowledge of the strengths and weaknesses of hydrogen-powered trains.
In Thoughts On Eurostar To North Netherlands And North West Germany, I proposed running bi-mode trains on the partially-electrified route between Amsterdam and Hamburg via Groningen and Bremen, which would be timed to connect to Eurostar’s services between London and Amsterdam. These could use diesel, hydrogen or battery power on the sections without electrification.
If hydrogen or battery power were to be used on the European bi-mode train, It would be possible to go between Sheffield and Hamburg on a zero-carbon basis, if all electric power to the route were to be provided from renewable sources.
Abellio Sees The PR Value In Running Zero-Carbon Trains
In My First Ride In An Alstom Coradia iLint, I talked about running hydrogen-powered trains on a hundred mile lines at 60 mph over the flat German countrside
The Midland Main Line is a real high speed railway, where trains go at up to 125 mph between two major cities, that are one-hundred-and-sixty miles apart.
Powered by hydrogen, this could be one of the world’s great railway journeys.
If hydrogen-power is successful, Abellio’s bottom line would benefit.
Conclusion
This franchise will be a big improvement in terms of carbon emissions.
As I said the choice of trains probably lies between Bombardier and Stadler.
But be prepared for a surprise.
Could A 125 Mph Electric Train With Batteries Handle The Midland Main Line?
In Bombardier’s 125 Mph Electric Train With Batteries, I investigated a pure electric train based on Bombardier’s proposed 125 mph bi-mode Aventra with batteries.
It would have the following characteristics.
- Electric power on both 25 KVAC overhead and 750 VDC third-rail.
- Appropriately-sized batteries.
- 125 mph running, where possible on electrification and/or battery power.
- Regenerative braking using the batteries.
- Low energy interiors and systems.
It would be a train with efficiency levels higher than any train seen before.
It would also be zero-carbon at the point of delivery.
An Example 125 mph Train
I will use the same size and specification of train, that I used in Bombardier’s 125 Mph Electric Train With Batteries.
- The train is five cars, with say four motored cars.
- The empty train weighs close to 180 tonnes.
- There are 430 passengers, with an average weight of 90 Kg each, with baggage, bikes and buggies.
- This gives a total train weight of 218.7 tonnes.
- The train is travelling at 200 kph or 125 mph.
Travelling at 200 kph, the train has an energy of 94.9 kWh.
I will also assume.
- The train uses 15 kWh per mile to maintain the required line speed and power the train’s systems.
- Regenerative braking is eighty percent efficient.
I will now do a few calculations.
Kettering To Leicester
Suppose one of the proposed trains was running between St. Pancras and Leicester.
- I’m assuming there are no stops.
- In a year or two, it should be able to run as far as Kettering using the new and improved 25 KVAC overhead electrification.
- The train would leave the electrification at Kettering with a full charge in the batteries.
- The train would also pass Kettering as close to the line speed as possible.
- Hopefully, the twenty-nine miles without electrification between Kettering and Leicester will have been updated to have the highest possible line speed, with many sections capable of supporting 125 mph running.
I can do a rough-and-ready calculation, as to how much energy has been expended between Kettering and Leicester.
- Twenty-nine miles at 15 kWh per mile is 435 kWh.
- The train has a kinetic energy of 94.9 kWh at 125 mph and twenty percent will be lost in stopping at Leicester, which is 19 kWh.
This means that a battery of at least 454 kWh will be needed to propel the train to Leicester.
Kettering To Sheffield
If the train went all the way without stopping between Kettering and Sheffield, the energy used would be much higher.
One hundred-and-one miles at 15 kWh is 1515 kWh.
So given that the train will be slowing and accelerating, we’re probably talking of a battery capacity of around 2000 kWh.
In our five-car example train, this is 400 kWh per car.
Kettering To Sheffield With Stops
The previous calculation shows what can be achieved, but we need a practical train service.
When I last went to Sheffield, the train stopped at Leicester, Loughborough, East Midlands Parkway, Long Eaton, Derby and Chesterfield.
I have built an Excel spreadsheet, that models this route and it shows that if the train has a battery capacity of 2,000 kWh, the train will get to Sheffield with 371 kWh left in the battery.
- Increase the efficiency of the regenerative braking and the energy left is 425 kWh.
- Reduce the train’s energy consumption to 12 kWh per mile and the energy left is 674 kWh.
- Do both and the energy left is 728 kWh.
The message is clear; train manufacturers and their suppliers should use all efforts to improve the efficiencies of trains and all of their components.
- Aerodynamics
- \Weight savings
- Bogie dynamics
- Traction motors
- Battery capacity and energy density
- Low energy lighting and air-conditioning
No idea however wacky should be discarded.
Network Rail also has a part to play.
- The track should have as a high a line speed as is practical.
- Signalling and timetabling should be designed to minimise interactions with other services.
Adding all these together, I believe that in a few years, we could see a train, that will consume 10 kWh per mile and have a regenerative braking efficiency of ninety-five percent.
If this can be achieved then the train will have 960 kWh in the batteries when it arrives in Sheffield.
Sheffield To Kettering
There is no helpful stretch of electrification at the Sheffield end of the route, so I will assume that there is a method of charging the batteries at Sheffield.
Unsurprisingly, as the train is running the same total distance and making the same number of stops, if the train starts with a full battery at Sheffield, it arrives at Kettering with the same amount of energy in the battery, as on the Northbound-run to Sheffield.
An Interim Conclusion
I am led to the interim conclusion, that given the continued upward curve of technology and engineering, that it will be possible to run 125 mph electric trains with an appropriately-sized battery.
How Much Battery Capacity Can Be Installed In A Train?
In Issue 864 of Rail Magazine, there is an article entitled Scotland High Among Vivarail’s Targets for Class 230 D-Trains, where this is said.
Vivarail’s two-car battery units contains four 100 kWh lithium-ion battery rafts, each weighing 1.2 tonnes.
Consider.
- Vivarail’s cars are 18.37 metres long.
- Car length in a typical Aventra, like a Class 720 train, is 24 metres.
- Aventras have been designed for batteries and supercapacitors, whereas the D78 trains, used as a base for the Class 230 train,were not.
- Batteries and supercapacitors are getting better all the time.
- Batteries and supercapacitors can probably be built to fit in unusually-shaped spaces.
I wouldn’t be surprised to see Aventras being able to take double the capacity of a Class 230 train under each car.
I wouldn’t rule out 2,000 kWh energy storage capacity on a five-car train, that was designed for batteries.
The actual size installed would depend on operator, weight, performance and cost.
My Excel spreadsheet shows that for reliable operation between Kettering and Sheffield, a battery of at least 1200 kWh is needed, with a very efficient train.
Charging Trains En-Route
I covered en-route charging fully in Charging Battery/Electric Trains En-Route.
I came to this conclusion.
I believe it is possible to design a charging system using proven third-rail technology and batteries or supercapacitors to transfer at least 200 kWh into a train’s batteries at each stop.
This means that a substantial top up can be given to the train’s batteries at stations equipped with a fast charging system.
An Astonishing Set Of Results
I use astonishing lightly, but I am very surprised.
I assumed the following.
- The train uses 15 kWh per mile to maintain the required line speed and power the train’s systems.
- Regenerative braking is eighty percent efficient.
- The train is fitted with 600 kWh of energy storage.
- At each of the six stations up to 200 kWh of energy can be transferred to the train.
Going North the train arrives in Sheffield with 171 kWh in the energy storage.
Going South the train arrives at Kettering with 61 kWh in the energy storage.
Probably a bit tight for safety, but surprising nevertheless.
I then tried with the following.
- The train uses 12 kWh per mile to maintain the required line speed and power the train’s systems.
- Regenerative braking is ninety percent efficient.
- The train is fitted with 500 kWh of energy storage.
- At each of the six stations up to 200 kWh of energy can be transferred to the train.
Going North the train arrives in Sheffield with 258 kWh in the energy storage.
Going South the train arrives at Kettering with 114 kWh in the energy storage.
It would appear that increasing the efficiency of the train gives a lot of the improvement.
Finally, I put everything, at what I feel are the most efficient settings.
- The train uses 10 kWh per mile to maintain the required line speed and power the train’s systems.
- Regenerative braking is ninety-five percent efficient.
- The train is fitted with 500 kWh of energy storage.
- At each of the six stations up to 200 kWh of energy can be transferred to the train.
Going North the train arrives in Sheffield with 325 kWh in the energy storage.
Going South the train arrives at Kettering with 210 kWh in the energy storage.
These sets of figures prove to me, that it is possible to design a 125 mph battery/electric hybrid train and a set of charging stations, that will make St. Pancras to Sheffield by electric train, a viable possibility without any more electrification.
Should The Train Be Fitted With A Means Of Charging The Batteries?
Why not?
Wires do go down and rest assured, a couple of battery/electric hybrids would get stuck!
So a small diesel or hydrogen generator to allow a train to limp a few miles might not be a bad idea.
Electrification Between Sheffield And Clay Cross On The Midland Main Line
In The UK’s New High Speed Line Being Built By Stealth, there is a sub-section with the same title as this sub-section.
This is the first part of that sub-section.
This article on Rail Technology Magazine is entitled Grayling Asks HS2 To Prepare For Electrification Of 25km Midland Main Line Route.
If this electrification happens on the Midland Main Line between Sheffield and Clay Cross, it will be another project in turning the line into a high speed route with a 200 kph operating speed, between London and Sheffield.
Currently, the electrified section of the line South of Bedford is being upgraded and the electrification and quadruple tracks are being extended to Glendon Junction, where the branch to Corby leaves the main line.
The proposed electrification will probably involve the following.
- Upgrading the line to a higher speed of perhaps 225 kph, with provision to increase the speed of the line further.
- Rebuilding of Chesterfield station in readiness for High Speed Two.
- Full electrification between Sheffield and Clay Cross.
Clay Cross is significant, as it is where the Midland Main Line splits into two Southbound routes.
- The main route through the Derwent Valley Mills World Heritage Site and Derby station.
- The secondary route of the Erewash Valley Line to the East Midlands Hub station.
Note.
- Some of the tunnel portals in the Derwent Valley are Listed.
- Trying to electrify the line through the World Heritage Site will be a legal and engineering nightmare.
- Network Rail has spent or is spending £250million on upgrading the Erewash Valley Line.
- High Speed Two will reach The East Midlands Hub station in 2032.
When High Speed Two, is extended North from the East Midlands Hub station, it will take a route roughly following the M1. A spur will link High Speed Two to the Erewash Valley line in the Clay Cross area, to enable services to Chesterfield and Sheffield.
But until High Speed Two is built North of the East Midlands Hub station, the Erewash Valley Line looks from my helicopter to be capable of supporting 200 kph services.
If this electrification is performed, it will transform the prospects for battery/electric hybrid trains between London and Sheffield.
- Trains will have to run fifteen miles less on battery power.
- Trains will arrive in both St. Pancras and Sheffield with batteries that are at least three-quarters full.
- Returning the trains will fill them up on the electrification at the end of the line.
- There will probably not be a need for charging systems at St. Pancras, Chesterfield and Sheffield.
I also think, that as the train could arrive in Sheffield with a full battery, there is the possibility of extending services past Sheffield to Barnsley, Huddersfield and cLeeds, if the operator felt it was a worthwhile service.
Nottingham
Nottingham is just eight miles from East Midlands Parkway station, which is less distance than Derby.
So if the battery/electric hybrid trains can reach Derby from Kettering on Battery power, with some help from charging at Leicester and Loughborough, the trains can reach Nottingham, where charging would be installed.
Conclusion
From my calculations, I’m sure that an efficient battery/electric hybrid train can handle all current services on the Midland Main Line, with third-rail charging at intermediate stations.
I do think though, that if Sheffield to Clay Cross Junction is electrified in preparation for High Speed Two, that it makes the design easier and the economics a lot better.
It would also give Sheffield a genuine sub-two hour service to London, which would only get better.
Five Mark 4 Coaches, A Driving Van Trailer And A Stadler UKLight Locomotive
In writing Would Electrically-Driven Trains Benefit From Batteries To Handle Regenerative Braking?, I started to analyse the mathematics and possibilities of a train with the following formation.
- Five Mark 4 Coaches, from an InterCity 225.
- A Driving Van Trailer (DVT)
- A variant of a Stadler UKlight locomotive, like a Class 68 or Class 88 locomotive.
The sub-section got too large and important so I decided to write it as a separate post.
I like the Class 68 locomotive, as it looks professional and seems to do all asked of it.
So what would be the kinetic energy of a formation of five Mark 4 coaches, between a DVT and a Class 68 Locomotive?
- The five Mark 4 coaches would weigh 209 tonnes.
- The Class 68 locomotive weighs 85 tonnes.
- The DVT weighs 42.7 tonnes
- I will assume that a five cars will seat around 300 passengers.
- The passengers weigh 27 tonnes, if you assume each weighs 90 Kg, with baggage, bikes and buggies.
- The train weight is 363.7 tonnes.
At 100 mph, which is the maximum speed of the Class 68 locomotive, the Omni Kinetic Energy Calculator gives the kinetic energy of the train as 100 kWh.
I doubt there’s the space to squeeze a 100 kWh of battery into a Class 68 locomotive to handle the regenerative braking of the locomotive, but I do believe that a locomotive can be built with the following specification.
- Enough diesel power to pull perhaps five or six Mark 4 coaches and a DVT at 125 mph.
- Ability to use both 25 KVAC and 750 VDC electrification.
- Battery to handle regenerative braking.
- As the Class 88 electro-diesel locomotive, which is around the same weight as a Class 68 locomotive, I suspect the proposed locomotive would be a bit heavier at perhaps 95 tonnes.
This train would have a kinetic energy of 160 kWh at 125 mph.
Consider.
- If the locomotive could have a 200 kWh battery, it could harvest all the regenerative braking energy.
- Accelerating the train to cruising speed uses most energy.
- Running at a constant high speed, would conserve the kinetic energy in the train.
- Stadler, who manufacture the Class 68 and 88 locomotives are going to supply a diesel/electric/battery version of the Class 755 train, for the South Wales Metro. In What Is The Battery Size On A Tri-Mode Stadler Flirt?, I estimated the battery size is about 120 kWh.
- The Class 68 and 88 locomotives are members of Stadler’s Eurolight family, which are designed for a 125 mph capability with passenger trains.
- I don’t believe the UK is the only country looking for an efficient locomotive to haul short rakes of coaches at 125 mph, on partially-electrified lines.
It should also be noted, that to pull heavy freight trains, the Class 88 locomotive has a 700 kW Caterpillar C27 diesel that weighs over six tonnes, whereas 200 kWh of battery, would weigh about two tonnes. I believe that a smaller diesel engine might allow space for a large enough battery and still be able to sustain the 125 mph cruise.
Stadler have the technology and I wonder, if they can produce a locomotive to fill the market niche!
In HS2 To Kick Off Sheffield Wiring, I reported on the news that the Northern section of the Midland Main Line between Clay Cross North Junction and Sheffield will be electrified.
This would greatly improve the performance of diesel/electric/battery hybrid trains between London and Sheffield.
- Between London and Kettering, the trains would be electrically-powered.
- Between Kettering and Clay Cross, they would use a mixture of diesel and battery operation.
- Between Clay Cross and Sheffield, the trains would be electrically-powered.
Note.
- Going North, trains would pass Kettering with a full battery.
- Going South, trains would pass Clay Cross with a full battery.
- Regenerative braking at stops between Kettering and Clay Cross would help recharge the batteries.
- The diesel engine would be sized to keep the train cruising at 125 mph on the gentle Midland Main Line and back up the acceleration needed after stops.
It would be a faster and very electrically-efficient journey, with a large reduction in the use of diesel power.
The locomotive would also have other uses in the UK.
- TransPennine services, where they could surely replace the Class 68 locomotives, that will haul Mark 5A coaches between Liverpool and Scarborough and Manchester Airport and Middlesborough.
- Between London and Holyhead
- Waterloo to Exeter via Basingstoke and Salisbury.
- Marylebone to Birmingham via the Chiltern Main Line, if the two ends were to be electrified.
- Services on the East West Rail Link.
- Between Norwich and Liverpool
- CrossCountry services.
Note.
- Services could use a rake of Mark 4 coaches and a DVT or a rake of new Mark 5A coaches.
- If more electrification is installed, the trains would not need to be changed, but would just become more efficient.
- The competition would be Bombardier’s proposed 125 mph bi-mode Aventra with batteries, that I wrote about in Bombardier Bi-Mode Aventra To Feature Battery Power.
And that is just the UK!
Conclusion
Using the Mark 4 coaches or new Mark 5A coaches with a new 125 mph diesel/electric/battery hybrid Stadler UKLight locomotive could create an efficient tri-mode train for the UK rail network.
The concept would have lots of worldwide applications in countries that like the UK, are only partially electrified.
HS2 To Kick Off Sheffield Wiring
The title of this post is the same as that of a small article in the August 2018 Edition of Modern Railways.
This is the first paragraph.
HS2 Ltd is to begin preparatory works for electrification of the Midland Main Line between Clay Cross North Junction and Sheffield
This will mean that the current Midland Main Line will be electrified at both ends, which will surely make it easier to design new trains for the line.
The UK’s New High Speed Line Being Built By Stealth
Wikipedia has a section called High Speed Rail. This is the first paragraph.
High-speed rail is a type of rail transport that operates significantly faster than traditional rail traffic, using an integrated system of specialised rolling stock and dedicated tracks. While there is no single standard that applies worldwide, new lines in excess of 250 kilometres per hour (160 miles per hour) and existing lines in excess of 200 kilometres per hour (120 miles per hour) are widely considered to be high-speed.
In the UK we have both types of high speed line mentioned in this definition.
High Speed One and High Speed Two have or will have operating speeds of 300 kph and 400 kph respectively and by any definition are true high speed lines.
There is also the East Coast Main Line and Great Western Main Line and West Coast Main Line, which are lines with long stretches, where continuous running at 200 kph is possible.
These lines certainly meet the 200 kph definition now and will likely exceed it, as digital in-cab signalling is deployed in the future and allows running at up to 225 kph in certain places.
Electrification Between Sheffield And Clay Cross On The Midland Main Line
This article on Rail Technology Magazine is entitled Grayling Asks HS2 To Prepare For Electrification Of 25km Midland Main Line Route.
If this electrification happens on the Midland Main Line between Sheffield and Clay Cross North Junction, it will be another project in turning the line into a high speed route with a 200 kph operating speed, between London and Sheffield.
Currently, the electrified section of the line South of Bedford is being upgraded and the electrification and quadruple tracks are being extended to Glendon Junction, where the branch to Corby leaves the main line.
The proposed electrification will probably involve the following.
- Upgrading the line to a higher speed of perhaps 225 kph, with provision to increase the speed of the line further.
- Rebuilding of Chesterfield station in readiness for High Speed Two.
- Full electrification between Sheffield and Clay Cross.
Clay Cross is significant, as it is where the Midland Main Line splits into two Southbound routes.
- The main route through the Derwent Valley Mills World Heritage Site and Derby station.
- The secondary route of the Erewash Valley Line to the East Midlands Hub station.
Note.
- Some of the tunnel portals in the Derwent Valley are Listed.
- Trying to electrify the line through the World Heritage Site will be a legal and engineering nightmare.
- Network Rail has spent or is spending £250million on upgrading the Erewash Valley Line.
- High Speed Two will reach The East Midlands Hub station in 2032.
When High Speed Two, is extended North from the East Midlands Hub station, it will take a route roughly following the M1. A spur will link High Speed Two to the Erewash Valley line in the Clay Cross area, to enable services to Chesterfield and Sheffield.
But until High Speed Two is built North of the East Midlands Hub station, the Erewash Valley Line looks from my helicopter to be capable of supporting 200 kph services.
- It is mainly double track, with sections where extra lines have been added.
- It is reasonably straight.
- There seem to be generous margins on either side.
- There is only one tunnel at Alfreton, which is 770 metres long.
- There is only three stations at Ilkeston, Langley Mill and Alfreton.
As many of the bridges seem new, has the Erewash Valley Line been prepared for electrification?
Electrification Around East Midlands Hub Station
I wouldn’t be surprised to see that by the opening of the East Midlands Hub station in 2032, that the following will have happened.
- The route between East Midlands Hub station and Sheffield via the Erewash Valley Line and Chesterfield has been fully electrified.
- A higher proportion of services between London and Sheffield will use the Erewash Valley Line, with times under two hours.
- From 2022, the trains running on the Midland Main Line will be 200 kph bi-mode trains.
As the East Midlands Hub Station and High Speed Two is developed, various electrified routes will open through the area, thus grdually reducing journey times between London and Sheffield.
Once the station is fully open, I suspect there will be services between London and Sheffield via High Speed Two and the Erewash Valley Line.
But when the High Speed 2 spur towards Sheffield is opened, the trains will take the high speed route.
Electrification From London To Kettering, Glendon Junction And Corby
Currently, the electrified section of the line South of Bedford is being upgraded and the electrification and quadruple tracks are being extended to Glendon Junction, where the branch to Corby leaves the main line.
When completed, this electrification will enable the following.
- Two electric trains per hour (tph) between London and Corby.
- Much of the route between London and Glendon Junction will be improved to allow 200 kph running.
- Much of the route between London and Glendon Junction will be quadruple tracks.
It will be a quality high speed line to a similar standard to that of much of the East Coast Main Line.
The True 200 kph (125 mph) Bi-Mode Train
In the Wikipedia entry for Leicester station, this is said about electrification of the Midland Main Line.
From 2022, services will be operated using bi-mode electro-diesel trains running in electro-pantograph mode between London St Pancras and Kettering North Junction, switching to electro-accumulator/diesel-electric mode northwards from there.
Bombardier have been quoted as developing a 200 kph bi-mode Aventra with batteries.
- 200 kph on 25 KVAC overhead electrification.
- 200 kph on diesel.
- Batteries for Last Mile operation.
- Better ambience than current bi-modes.
- Low and level floors.
If Bombardier can produce such a train, surely other train manufacturers can?
Electrification Between Glendon Junction And Market Harborough
I talked about this in MML Wires Could Reach Market Harborough, where I said this.
It appears that Network Rail have a problem.
- Electrification of the Midland Main Line (MML) is to run as far as Kettering and Corby stations.
- The power feed is to be located at Braybrooke, which is just South of Market Harborough station.
So Network Rail are now looking for a twelve mile long extension lead.
A Network Rail spokesman, says they are looking at various options, including an underground cable or extending the Overhead Line Equipment.
Since I wrote that post a few weeks ago, I have looked at that section of line and have had various messages, which lead me to the belief, that all bridges and structures have been raised to allow electrification to be added to the line.
These points are in favour of electrification!
- The only station is Market Harborough, where the track is s being realigned to increase linespeed.
- Bridges, structures and track appear to have been upgraded for electrification.
- There are only two tracks.
- Network Rail need a power connection.
It will be a matter of heads and tails, as to whether Glendon Junction and Market Harborough station will be electrified.
The Electrification Gap Between Market Harborough And East Midlands Hub Stations
These are my thoughts on various sections going North from Market Harborough station.
Between Market Harborough And Leicester
This doesn’t appear to be too difficult to electrify, if that were to be decided, until approaching Leicester station, where there are several bridges over the track.
A driver also told me, that under one bridge the track can’t be lowered, due to the presence of a large sewer.
If the proposed bi-mode trains have a Last Mile battery capability, discontinuous electrification as proposed for South Wales could be used on these bridges.
But the track is fairly straight and the speed limits could be fairly high enabling the proposed bi-mode trains to be cruising near to 200 kph.
Whatever is done, I suspect that the track improvements and the electrification work South of Kettering will enable the new bi-mode trains to go between Leicester and London in comfortably under an hour.
Leicester Station
I think Leicester station is both a problem and a solution.
I don’t think it is possible to electrify the current station without a lot of disruption and major works because of the number of bridges South of the station.
But according to Wikipedia, plans exist to regerenate the station, which could be a big opportunity to create the most cost-effective solution to powering the trains.
Northwards From Leicester
This section looks an ideal one for the proposed 200 kph bi-mode train, with fairly straight tracks.
Operation Of The Bi-Mode Trains
Battery Use
I believe that Bombardier’s design for a 200 kph bi-mode train, doesn’t just use batteries for Last Mile operation.
Using discontinuous electrification on the bridges South of Leicester, which would be the sensible way to electrify that section, but would need the new trains to have a battery capability to jump the gaps.
I also believe that Aventras use batteries to handle regenerative braking, as do Hitachi on their Class 800 trains.
Bombardier Aventras seem to have lots of powered axles and Bombardier have stated that the bi-mode will have distributed power.
As an Electrical and Control Engineer, I believe that the most efficient battery strategy with distributed power, would be to distribute the batteries to each car.
- Batteries would be close to the traction motors, which is electrically efficient.
- Batteries would be smaller and easier to install on the train.
- Battery power could be used to power the train’s systems, as Hitachi do!
- Battery power could be used to move the train and assist in acceleration
Each car would have its own computer to use the most efficient strategy.
I would also put an appropriately sized diesel generator in each car.
In the mathematical modelling of systems consisting of several identical units working together, it is a common technique to look at an individual car.
Consider the following, where I estimate the weight of a car in a proposed bi-mode Aventra.
- A motor car for a Class 345 train, which is another Aventra variant, weighs 36.47 tonnes.
- I estimate that a typical car in the proposed bi-mode train will accommodate a total of about 70 seated and standing passengers.
- With bags, buggies and other things passengers bring on, let’s assume an average passenger weight of 90 kg, this gives an extra 6.3 tonnes.
- Suppose the battery and the diesel were to weigh a tonne each
So I will assume that a typical car weighs 44.77 tonnes.
When running at 200 kph, the car will have a kinetic energy of around 19.5 kWh.
The 30 kWh battery in a Nissan Leaf could handle that amount of energy.
The kinetic energy of a passenger train is surprisingly small.
I suspect that each car has a battery size of about 50 kWh, so that it can adequately power the train in all modes.
Acceleration
Acceleration of a train, is the part of the journey that uses most power.
These trains will need to have the same or better acceleration to the Class 222 trains, that currently work the route, as otherwise timings would be slower and a marketing disaster.
In Have Bombardier Got A Cunning Plan For Voyagers?, I did the calculation of the kinetic energy for a four-car Class 220 train, which is in the same Voyager family as the Class 222 train.
Voyagers are an interesting train, as they cruise at 200 kph and have a diesel engine in each car, which generates electricity to power the train.
Consider these facts for a four-car Class 220 train.
- The train has a weight of 185.6 tonnes, so the average car weight is 46.4 tonnes
- The train has seats for two hundred passengers or 50 per car.
- If we assume that each passenger weighs 90 Kg. with their baggage this gives a total car weight of 50.9 tonnes.
This one car of a Class 222 train running at 200 kph has a kinetic energy of 22 kWh.
As both trains are assumed to be travelling at the same speed, the difference in kinetic energy is down to the weight of the car and the number of passengers.
I have assumed more passengers in the Aventra, as I suspect modern design will improve the figure.
Consider each of these trains doing a stop from 200 kph on the Midland Main Line.
The Aventra will convert the train’s kinetic energy into electricity in the batteries, so if I assume that the efficiency of the regenerative braking is eighty percent, this would mean that 19.5 * 0.8 or 15.6 kWh will be stored in the battery in each car. To accelerate back to 200 kph, the onboard diesel engines will have to supply 3.9 kWh for each car.
The Class 222 train will convert the train’s kinetic energy into heat. To accelerate back to 200 kph, the onboard diesel engines will have to supply 22 kWh for each car.
Bombadier have said that their design for a bi-mode Aventra will have distributed power. So if this includes the batteries and the diesel engines, I wouldn’t be surprised if each car has a battery and a diesel engine.
On the Class 222 train a 560 kW diesel is used in each car to provide the 22 kWh to accelerate the train.
So what size of diesel engine would be needed to supply the 3.9 kWh needed to accelerate the train?
Assuming the diesel is as efficient as that in the Class 222 train, the diesel engine would only be in the region of 100 kW.
Which seems very small!
But suppose something like the quiet Cummins ISBe engine, that is used in a New Routemaster bus is installed.
- This engine has a capacity of 4.5 litres and a rating of 185 bhp/138 kW.
- It is a quarter the size of the engine in the Class 222 train.
- One of the major uses of a larger 5.9 litre version of this engine is in a Dodge Ram pickup.
The engine would only run when the power in the battery was below a certain level.
Cruising At 200 kph
Once at 200 kph, I suspect that most of the power required would come from the batteries.
These would be topped up as required by the diesel engine.
Charging The Batteries
Expecting a small diesel engine to charge the batteries sufficiently between London and Sheffield is probably a big ask, especially if the new franchise wanted to run a train that stopped everywhere North of Kettering.
South of Kettering the train would use the electrification and I suspect trains going North will say good-bye to the electrification with full batteries.
So this is why Chris Grayling’s statement of possible electrification between Sheffield and Clay Cross is important.
Southbound trains from Sheffield would leave Clay Cross junction with full batteries, whether they are going via Derby or the Erewash Valley Line.
Between London And Sheffield
Trains between London and Sheffield would only be relying on the diesel engines to top up the batteries between Glendon Junction and Clay Cross.
This is probably about eighty miles. Trains currently take an hour with stops at Leicester and Derby.
It’s a tough ask!
But it might be possible, if an efficient, aerodynamically slippery train is launched with full batteries at full speed at Clay Cross and Glendon Junctions into a route without electrification, which is as straight and level as possible with only gentle curves.
Between London And Nottingham
The distance on the related route between Glendon Junction and Nottingham is about sixty miles with a couple of stops.
This could be an even tougher ask! A charging system at Nottingham might make all the difference.
Bombardier
Obviously Bombardier have done extensive simulations and they wouldn’t be offering the train for the new East Midlands Franchise, if they knew it wasn’t a viable solution!
If they can develop a train that can jump an eighty mile electrification gap at 200 kph, they’ll have a train, that will be a serious export possibility.
The following would also help.
- Any extra electrification.
- Launching the train at a higher speed into the gap. 225 kph would be the equivalent of an extra 5kWh in the battery.
- Batteries with a higher energy density will emerge.
- More efficient regenerative braking.
- Better aerodynamics.
I also believe that big improvements could come from a more sophisticated train control system.
Bombardier are developing a totally different philosophy of train design.
Conclusion
It looks like the reality of mathematics and dynamics will be able to satisfy the seemingly impossible dreams of Chris Grayling!









