The Anonymous Widower

A Lonely Electric Bus

I found this bus at its terminus by the old Barts Hospital.

It is an Alexander Dennis Enviro200ev.

They are built in Britain on a Chinese chassis from BYD.

This week, I read the obituary of Simon Norton, who was a mathematician, who had an interest in group theory and bus routes and timetables.

He could have worked out a strategy, of how to keep London’s fleet of electric buses fully charged.

Consider.

  • London’s single-deck routes are generally the shorter ones, so are probably ideal for electric buses.
  • My instinct is telling me, that if all small buses were to be replaced with electric ones, the tight network would show up places for charging points.
  • Would some be at the end of routes and some where several routes crossed?

It would be a fun calculation.

I suspect, I would solve it using a graphical method.

March 10, 2019 Posted by | Transport | , , | Leave a comment

Norwich In Ninety And Ipswich In Sixty Is Just Seventy Days Away!

This article on the Norwich Evening News is entitled At Last! High Speed Train Service Delivering Norwich To London In 90 Minutes Will Soon Begin.

This is the key section.

The first of the faster services are due to come into service on Monday, May 20.

The 90-minute services will depart from Norwich at 9am and 5pm, Monday to Saturday, and will call at Ipswich at 9.33am and 5.33pm.

Meanwhile the London Liverpool Street service departs at 11am and 7pm, Monday to Saturday, and calls at Ipswich at 11.55am and 7.57pm.

Greater Anglia said it will shave 12 minutes off the current fastest journey between Norwich and London and cut the fastest journey between Ipswich and London by four minutes.

I shall be on the first train from London as far as Ipswich.

I don’t want to get tainted do I?

March 10, 2019 Posted by | Transport | , , , | Leave a comment

Comparing Trams And Tram-Trains In Manchester And Sheffield

In Could A Class 399 Tram-Train With Batteries Go Between Manchester Victoria And Rochdale/Bury Bolton Street/Rawtenstall Stations?, I discussed how Class 399 tram-trains might be used on a route in the Manchester area.

This was my conclusion.

Could we see tram-trains running from Bury Bolton Street, Hebden Bridge, Rawtenstall and Rochdale into Manchester Victoria and then taking to the existing tram network?

If you’ve ever been to Karlsruhe, as I have to see the Class 399 tram-trains German cousins, you wouldn’t rule out anything.

That would include tram-train services to Blackburn, Buxton, Chester, Glossop, Hebden Bridge, Sheffield, Southport and Wigan.

So how do Manchester’s M5000 trams, Sheffield’s Supertrams compare to the Class 399 tram-train?

Body Construction

  • M5000 – Aluminium
  • Supertram – Steel
  • Class 399 – Lightweight Stainless Steel

Does the Class 399 use lightweight stainless steel to give enhanced crash protection and better corrosion resistance?

Sections, Doors and Length

  • M5000 – 2, 4 and 38.4 metres
  • Supertram – 3, 4 and 34.8 metres
  • Class 399 – 3, 4 and 37.2 metres

Capacity

  • M5000 – 60 or 66 seats, 149 standing, 209/215 maximum
  • Supertram – 86 seats, 155 standing, 241 maximum
  • Class 399 – 88 seats and 150 standing, 238 maximum

The M5000 is a bit less because it is a shorter vehicle with less standing space.

Entrance Height

  • M5000 – 0.98 metres
  • Supertram – 0.42 metres
  • Class 399 – .425 metres

The Supertram and the Class 399 have obviously been built to be able to use the same tram platforms in Sheffield.

Wikipedia says this about standard UK platform height.

The standard height for platforms is 915 mm with a margin of +0,-25 mm

But it would appear that the M5000 is not far from the UK standard height, but the Class 399 is 0.465 metres too low.

Consider.

  • The entrance height of a Greater Anglia Class 755 train, which is a bi-mode FLIRT is 0.96 metres.
  • On the South Wales Metro, variants of Class 399 tram/trains and Class 755 trains will share platforms.

So Stadler must have a nifty solution to overcome the platform height difference for these two trains, which is similar to that in Manchester between a Class 399 tram-train and an M5000.

If it’s on the tram-train, then Stadler have a solution, that will allow Class 399 tram-trains to run on the Manchester Metrolink.

The datasheet for the Class 399 tram-train says this about the suspension of the tram-train.

Smooth and silent operation with secondary air suspension and resilient wheels.

Secondary air suspension is not new on trains, as it certainly featured on British Rail Mark 3 coaches from the 1970s, which have a legendary smooth ride. It can still be seen between the bogie and the coach on many Bombardier trains, which trace their ancestry to British Rail designs.

The picture shows the bogie on a Class 378 train.

Note the air-suspension above the frame of the bogie.

Some cars use secondary air suspension with computers to control the amount of air in each rubber bag to improve the ride and road-holding.

Transport for London measure the pressure in the suspension and use this to calculate train loading. I described this application in Is This The Hippest Train Status Displays?

Could the air bags be pumped up to raise the train and and reduced in pressure to drop it a few centimetres?

There are certainly suspension engineers, in the automotive and motor-sport industries, who have relevant experience and could suggest a solution.

All this speculation is a bit like Lew Grasde’s quote on the film Raise the Titanic on which he lost a lot of money.

Raise The Titanic?  It would have been cheaper to lower the Atlantic!

Here it’s a bit of the reverse as if the tram-trains can be adjusted to the platform height, then hundreds of platforms don’t need to be rebuilt.

Suppose the platforms were built to fit an existing tram or train.

  • On the Manchester Metrolink the platforms would fit the M5000 trams.
  • On the Sheffield Supertram, the platforms would fit the Supertrams.
  • On the South Wales Metro, the platforms would fit the Welsh variant of the Class 755 train.

The Class 399 tram-trains running in Sheffield have their suspension adjusted on mnufacture and in the depot, so that there is level access between tram-train and platform.

Could the same tram-trains be adjusted so that they fit the Manchester Metrolink platforms, which are higher?

If they can, then Manchester has got a source of off-the-shelf tram-trains.

The picture shows a Class 399 tram-train at Rotherham Parkgate. Note the level access at the orange door in the foreground.

Manchester would need a different colour as Chelsea Blue wouldn’t be appropriate.

The intriguing idea, is can the same Class 399 tram-trains run in both Manchester and Sheffield, with the tram-train’s computer adjusting the ride height to suit the different height of platforms?

At present the answer is probably no, as if they could then there wouldn’t be dual-height platforms at Rotherham Central station.

Note the slopes down on both sides of the tracks from the high-level train platforms in the background, to the low-level tram platforms in the foreground.

It all depends on whether the suspension design is possible.

If it is, which I doubt, it would get round the bit problem of platforms on tram-train systems.

Weight

  • M5000 – 30.7 tonnes
  • Supertram – 46.5 tonnes
  • Class 399 – .66.1 tonnes

The Class 399 tram-train is a heavy beast so raising it by much might be difficult, as you changed from Sheffield to Manchester heights.

Operating Speed

  • M5000 – 80 kph
  • Supertram – 80 kph
  • Class 399 – .100 kph

Power And Power/Weight Ratio

  • M5000 – 480 kW – 15.6 kW/tonne
  • Supertram – 1108kW –  23.8 kW/tonne
  • Class 399 – 870 kW – 13.2 kW/tonne

Noye.

  1. By comparison the power/weight ratio of a Class 321 train is just 7.9 kW/tonne
  2. I have talked to Sheffield tram-drivers and their view is that the Class 399 tram-trains handle Sheffield’s hills better with a full load of passengers.
  3. The Class 399 has six traction motors, whereas the others have four.

So perhaps, the way that the Class 399 tram-train puts its power to the rail with more driven axles,  is important.

Conclusion

I am convinced that just as Sheffield’s Supertram can work happily with Class 399 tram-trains, Stadler have ways and means of making Manchester Metrolink’s M5000 trams work with the tram-trains.

If the Class 399 tram-train is compatible with both tram networks, this will be a great advantage in designing new tram-train routes.

It would also mean that one day, a tram-train service could run from Cathedral in Sheffield to Piccadilly Gardens in Manchester via the Hope Valley Line.

I suspect that a lot of local services from the two cities will be run by tram-train services, that cross the cities.

 

 

 

 

March 10, 2019 Posted by | Transport | , , , | 2 Comments

Stadler Rail’s Specification For UK Trains

These are links to the pdf specifications of Stadler Rail’s products in the UK.

I shall add more as I find them!

March 10, 2019 Posted by | Transport | , , , | 1 Comment

Science Has Dim View Of Brexiteers’ Brains

The title of this post is the same as that as an article on Page 3 of The Sunday Times

This is the first three paragraphs.

It is a belief that some pro-Europeans already hold dear, but a group of scientists now claim to have confirmed it: Brexit voters are less bright than remainers.

Researchers gave 11,225 volunteers psycholigical tests before the referendum and asked how they intended to vote. Results suggest that leavers tended to be less numerate, more impulsive and more prone to accept the unsupported claims of authoritarian figures.

“Compared with remain voters, leave voters displayed significantly lower levels of numeracy and appeared more reliant on impulsive thinking.” said the researchers, based at Missouri University.

Nigel Farage is quoted as saying the research was “divisive and arrogant”.

Some would say those two words should be applied to him.

March 10, 2019 Posted by | World | , , | 1 Comment

Liverpool Lime Street And Chester Services Via Halton Curve Start In May

This page on the National Rail web site is entitled Changes to the National Rail Timetable.

Under Transport for Wales, this is said.

New services will run between Liverpool Lime Street and Chester via Runcorn. An hourly service will run, with peak time extensions to Wrexham General.

This sounds like the Halton Curve service to me.

Timing On The Route

Timing on the sections of route are as follows.

  • Liverpool Lime Street and Runcorn – 21 minutes – West Midland Class 350 train, with a stop at Liverpool South Parkway.
  • Runcorn and Chester – 17 minutes – Parliamentary service as given on Wikipedia.
  • Chester and Wrexham General – 14 minutes – Trains for Wales

This gives timings as follows.

  • Liverpool Lime Street and Chester – 38 minutes
  • Liverpool Lime Street and Wrexham General – 52 minutes

It looks to me that a round trip would be under two hours to both destinations, so two trains would be enough to provide an hourly service.

If Trains for Wales should decide to run a half-hourly service, then four trains would be needed.

Trains On The Route

The Crewe-Liverpool Line has fast services between Liverpool Lime Street and Crewe, so I suspect that it has a speed limit of at least 100 mph.

For this reason along, I suspect that all operators and Network Rail, would hope that Trains for Wales will use a train capable of running at up to 100 mph between Liverpool Lime Street and Runcorn.

The operating speed of trains owned or planned by Trains for Wales are.

It seems to me for various reasons that the Class 769 trains would be ideal for this route.

  • They could use the electrification between Liverpool Lime Street and Runcorn.
  • They are four-car high-capacity trains, that meet all the regulations.
  • They are 100 mph trains on electrification.
  • They will be straight from the factory with new interiors.
  • Northern will have servicing facilities for these trains at Allerton TMD.
  • They would give the service some publicity.

They probably won’t be delivered in time for May 2019, but they could replace whatever is used for the initial service.

 

 

March 10, 2019 Posted by | Transport | , , , , | 11 Comments