easyJet And Rolls-Royce Pioneer Hydrogen Energy Combustion Technology In H2ZERO Partnership
The title of this post, is the same as that of this press release from Rolls-Royce.
These three opening paragraphs outline the project.
easyJet and Rolls-Royce today announced a ground-breaking new partnership, H2ZERO, that will pioneer the development of hydrogen combustion engine technology capable of powering a range of aircraft, including those in the narrow-body market segment.
Both companies have committed to working together on a series of engine tests on the ground, starting later this year and have a shared ambition to take the technology into the air. The objective of the partnership is to demonstrate that hydrogen has the potential to power a range of aircraft from the mid-2030s onwards.
While Rolls-Royce will bring its expertise in engine development and combustion systems, easyJet will contribute its operational knowledge and experience to H2ZERO and will also directly invest in the test programme.
This to my mind is good news.
This paragraph gives details of some of the planned work.
Through H2ZERO, the companies will support an early concept ground test of a Rolls-Royce AE 2100 engine in the UK later this year. This will be followed by a full-scale ground test of a Rolls-Royce Pearl 15 jet engine – a range of location options are being assessed for this including the Rolls-Royce test facility in Mississippi, USA. The programme will build on initial hydrogen combustion and fuel system rig tests that Rolls-Royce is undertaking with both Cranfield and Loughborough universities.
Note.
- The Rolls-Royce AE 2100 engine, powers the Lockheed Super Hercules amongst others.
- Rolls-Royce Pearl 15 powers various business jets.
easyJet and Rolls-Royce certainly have ambitions, and as there is little about the route they are taking to decarbonise, I would assume, that the main purpose of the study, is to find the optimal route.
I have just found this paper on the German Aerospace Centre web site, which is entitled Assessment Of Hydrogen Fuel Tank Integration At
Aircraft Level.
It uses as a baseline aircraft, the Airbus A320neo, of which easyJet have a few!
I suspect that using some of the techniques outlined in this paper, Rolls-Royce could decarbonise an Airbus A320neo.
Ryanair Backs Away From Boeing Jet Order
The title of this post, is the same as that of this article on The Times.
These are the first two paragraphs.
Ryanair has ended talks to purchase tens of billions of dollars of Boeing jets amid a stand-off over the price.
The Irish budget airline had been in talks to buy as many as 250 planes of the 737 Max 10 model but said yesterday that the talks had collapsed.
But have Michael O’Leary and Boeing fallen out over hydrogen?
Consider.
- Many countries in Ryanair’s largest markets are aiming to go net carbon-free by 2050 or even earlier. Scotland is aiming for 2045.
- An airliner delivered today will still be flying twenty or even thirty years later.
- I believe that by 2030, small airliners up to thirty passengers will be zero-carbon.
In Could An A320 neo Be Rebuilt As A ZEROe Turbofan?, I came to this conclusion.
I very much feel that there will be a route to convert some or all of the A 320 neo aircraft to hydrogen power.
If Airbus can offer an airliner, that can be rebuilt as a hydrogen-powered plane that must change the economics of purchasing a fleet of airliners, which could be made worthless by worldwide carbon emission legislation.
Because the Boeing aircraft is a 1960s design with an aluminium airframe, I would doubt it is designed to be converted to hydrogen power.
Wizz Air Plans Cheaper Fares As Capacity Grows
The title of this post, is the same as that of this article on The Times.
This is the introductory paragraph.
One of Europe’s leading budget airlines is forecasting a sharp drop in the price of fares as it expects to increase the number of flights this summer to as much as 80 per cent of normal capacity.
That sounds fair to me, as it’s just supply and demand.
I’ve only ever flown Wizz Air once and that was from Liverpool to Gdansk, where I had a memorable couple of days, before taking the train home to London.
I would certainly rate them better than Ryanair.
The article intrigued me.
It said that Wizz Air had made a large loss but had raised a sum to more than cover it on the bond market.
So I looked up their fleet on Wikipedia.
- A 320-200 – 66
- A 320 neo – 6
- A 321-200 – 41
- A 321 neo – 23 – Deliveries until 2026
- A 321 XLR – 20 – Deliveries from 2023 to 2026
In 2026, Wizz Air will end up with forty-nine neo aircraft and how many of the 107 older ones, they want to keep.
Under Environmental Protection on the Wikipedia entry for Wizz Air, this is said.
One year later, in November 2020, among the European airlines, Wizz Air was able to show the lowest CO2 emissions per passenger / kilometre and underlined their commitment to further reducing their environmental footprint. As part of their strategy, all fuel-saving flight phases of take-off and landing are continuously monitored for maximum environmental optimization, which has a significant impact on further continuous reductions in CO2 emissions.
I would assume, that this means, they take carbon emissions seriously.
When I saw these fleet sizes and put them together with Wizz Air, I wondered if Airbus have offered the airline a route to decarbonisation by converting the neo aircraft to hydrogen. I believe this is possible and said so in Could An A320 neo Be Rebuilt As A ZEROe Turbofan?
These fleet sizes don’t rule it out and if there was a way to remanufacture later A 320s to hydrogen aircraft, it would be a good way to continue to sell aircraft.
IAG To Operate 10 Per Cent Of Flights With Sustainable Aviation Fuel By 2030
The title of this post, is the same as that of this article on Business Traveller.
These are the first two paragraphs.
International Airlines Group has announced a commitment to operate 10 per cent of its flights with sustainable aviation fuel (SAF) by 2030.
The owner of Aer Lingus, British Airways, Iberia and Vueling says it will purchase one million tonnes of sustainable jet fuel per year, enabling it to cut its annual emissions by two million tonnes by 2030.
It is a welcome development.
My feeling is that although a lot of greens, think that sustainable aviation fuel (SAF) is a cop-out, it is the only way we have to cut aviation’s carbon emissions in the short-term.
- It would not need any expensive modifications to aircraft.
- SAF can also be delivered to airports using existing infrastructure like pipelines or rail tankers.
- SAF can be made from household and industrial waste, disposable nappies and other materials like scrap wood and unwanted clothes, most of which will otherwise end up in landfill.
I also think that SAF could be a way to decarbonise existing rail locomotives by replacing the diesel engines with gas turbines.
So will IAG commitment give a boost to the production of SAF? I certainly hope it does, as we’ll all benefit.
Hydrogen-Powered Aircraft
This infographic from Airbus shows three of their proposed designs for hydrogen-powered aircraft.

Discover the three zero-emission concept aircraft known as ZEROe in this infographic. These turbofan, turboprop, and blended-wing-body configurations are all hydrogen hybrid aircraft.
Two of the designs; the ZEROe Turboprop and ZEROe Turbofan appear to have been designed by re-engineering current technology and designs.
The one I like is the Turbofan, which I feel is based on the airframe of the current A 320 neo.
- Much of the wing, cockpit and fuselage appear very similar to that of the A 320 neo
- There is a hydrogen tank in the rear fuselage.
- The engines are probably modern turbofans, adjusted to run on hydrogen.
- Range and passenger capacity are very similar to the current aircraft.
- The ZEROe Turbofan would fit current airport infrastructure like tugs and terminals.
- Aircrew would need little retraining between current A 320s and ZEROe Turbofans.
There might even be the possibility of being able to convert an A 320 neo into a ZEROe Turbofan!
But there is a flaw in my reasoning.
IAG have placed a large order for Boeing 737 MAX aircraft. Wikipedia says this in the entry for IAG.
In June 2019, IAG signed a letter of intent to purchase 200 Boeing 737 MAX aircraft even though at the time of the signing the 737 MAX was still grounded worldwide following the two fatal crashes likely caused by the design of the MCAS system. Aviation analysts have questioned IAG’s leadership in making such an order when the 737 MAX design is still being rectified. IAG CEO Willie Walsh, shrugged off the plane’s uncertain future. “We’re partnering with the Boeing brand”, he said. “That’s the brand that I’m doing business with. That’s the brand that I’ve worked with for years. And it’s a brand that I trust”
Could Boeing have offered a 737 MAX, that can be converted to hydrogen?
I certainly feel that both a 737 MAX and an A 320 neo can be converted to hydrogen.
- The visualisations from Airbus of the A 320 neo and the ZEROe Turbofan are remarkably similar.
- The 737 MAX is a traditional aluminium aircraft, so may be easier to convert.
- As Boeing probably need a winner more urgently than Airbus, perhaps they can deliver a hydrogen-powered aircraft around the middle of the decade.
- Both aircraft are a bit like Lego and can be shortened or lengthened as required.
- Perhaps one or other of the planemakers have come up with a technique for storing environmentally-friendly liquid ammonia in the wings.
- See Could Current Airliners Be Fuelled With Ammonia?
As my mother used to say. “It’ll all come out in the wash!”
But I do feel by 2030, we’ll be seeing zero-carbon airlines on short-haul routes. So IAG’s aim of getting ten percent of planes powered by SAF by 2030, is probably a stop-gap that will continue with older planes for some years.
High-Speed Low-Carbon Transport Between Great Britain And Ireland
Consider.
- According to Statista, there were 13,160,000 passengers between the United Kingdom and the Irish Republic in 2019.
- In 2019, Dublin Airport handled 32,907,673 passengers.
- The six busiest routes from Dublin were Heathrow, Stansted, Amsterdam, Manchester, Birmingham and Stansted.
- In 2018, Belfast International Airport handled 6,269,025 passengers.
- The four busiest routes from Belfast International Airport were Stansted, Gatwick. Liverpool and Manchester, with the busiest route to Europe to Alicante.
- In 2018, Belfast City Airport handled 2,445,529 passengers.
- The four busiest routes from Belfast City Airport were Heathrow, Manchester, Birmingham and London City.
Note.
- The busiest routes at each airport are shown in descending order.
- There is a lot of air passengers between the two islands.
- Much of the traffic is geared towards London’s four main airports.
- Manchester and Liverpool get their fair share.
Decarbonisation of the air routes between the two islands will not be a trivial operation.
But technology is on the side of decarbonisation.
Class 805 Trains
Avanti West Coast have ordered thirteen bi-mode Class 805 trains, which will replace the diesel Class 221 trains currently working between London Euston and Holyhead.
- They will run at 125 mph between Euston and Crewe using electric power.
- If full in-cab digital signalling were to be installed on the electrified portion of the route, they may be able to run at 140 mph in places under the wires.
- They will use diesel power on the North Wales Coast Line to reach Holyhead.
- According to an article in Modern Railways, the Class 805 trains could be fitted with batteries.
I wouldn’t be surprised that when they are delivered, they are a version of the Hitachi’s Intercity Tri-Mode Battery Train, the specification of which is shown in this Hitachi infographic.
Note.
- I suspect that the batteries will be used to handle regenerative braking on lines without electrification, which will save diesel fuel and carbon emissions.
- The trains accelerate faster, than those they replace.
- The claimed fuel and carbon saving is twenty percent.
It is intended that these trains will be introduced next year.
I believe that, these trains will speed up services between London Euston and Holyhead.
- Currently, services take just over three-and-a-half hours.
- There should be time savings on the electrification between London Euston and Crewe.
- The operating speed on the North Wales Coast Line is 90 mph. This might be increased in sections.
- Some extra electrification could be added, between say Crewe and Chester and possibly through Llandudno Junction.
- I estimate that on the full journey, the trains could reduce emissions by up to sixty percent compared to the current diesel trains.
I think that a time of three hours could be achievable with the Class 805 trains.
New trains and a three hour journey time should attract more passengers to the route.
Holyhead
In Holyhead Hydrogen Hub Planned For Wales, I wrote about how the Port of Holyhead was becoming a hydrogen hub, in common with several other ports around the UK including Felixstowe, Harwich, Liverpool and Portsmouth.
Holyhead and the others could host zero-carbon hydrogen-powered ferries.
But this extract from the Wikipedia hints at work needed to be done to create a fast interchange between trains and ferries.
There is access to the port via a building shared with Holyhead railway station, which is served by the North Wales Coast Line to Chester and London Euston. The walk between trains and ferry check in is less than two minutes, but longer from the remote platform 1, used by Avanti West Coast services.
This Google Map shows the Port of Holyhead.
I think there is a lot of potential to create an excellent interchange.
HSC Francisco
I am using the high-speed craft Francisco as an example of the way these ships are progressing.
- Power comes from two gas-turbine engines, that run on liquified natural gas.
- It can carry 1024 passengers and 150 cars.
- It has a top speed of 58 knots or 67 mph. Not bad for a ship with a tonnage of over 7000.
This ship is in service between Buenos Aires and Montevideo.
Note.
- A craft like this could be designed to run on zero-carbon liquid hydrogen or liquid ammonia.
- A high speed craft already runs between Dublin and Holyhead taking one hour and forty-nine minutes for the sixty-seven miles.
Other routes for a specially designed high speed craft might be.
- Barrow and Belfast – 113 miles
- Heysham and Belfast – 127 miles
- Holyhead and Belfast – 103 miles
- Liverpool and Belfast – 145 miles
- Stranraer and Larne – 31 miles
Belfast looks a bit far from England, but Holyhead and Belfast could be a possibility.
London And Dublin Via Holyhead
I believe this route is definitely a possibility.
- In a few years, with a few improvements on the route, I suspect that London Euston and Holyhead could be fairly close to three hours.
- With faster bi-mode trains, Manchester Airport and Holyhead would be under three hours.
- I would estimate, that a high speed craft built for the route could be under two hours between Holyhead and Dublin.
It certainly looks like London Euston and Dublin and Manchester Airport and Dublin would be under five hours.
In A Glimpse Of 2035, I imagined what it would be like to be on the first train between London and Dublin via the proposed fixed link between Scotland and Northern Ireland.
- I felt that five-and-a-half hours was achievable for that journey.
- The journey would have used High Speed Two to Wigan North Western.
- I also stated that with improvements, London and Belfast could be three hours and Dublin would be an hour more.
So five hours between London Euston and Dublin using current technology without massive improvements and new lines could be small change well spent.
London And Belfast Via Holyhead
At 103 miles the ferry leg may be too long for even the fastest of the high speed craft, but if say the craft could do Holyhead and Belfast in two-and-a-half hours, it might just be a viable route.
- It might also be possible to run the ferries to a harbour like Warrenpoint, which would be eighty-six miles.
- An estimate based on the current high speed craft to Dublin, indicates a time of around two hours and twenty minutes.
It could be viable, if there was a fast connection between Warrenpoint and Belfast.
Conclusion
Once the new trains are running between London Euston and Holyhead, I would expect that an Irish entrepreneur will be looking to develop a fast train and ferry service between England and Wales, and the island of Ireland.
It could be sold, as the Greenest Way To Ireland.
Class 807 Trains
Avanti West Coast have ordered ten electric Class 807 trains, which will replace some of the diesel Class 221 trains.
- They will run at 125 mph between Euston and Liverpool on the fully-electrified route.
- If full in-cab digital signalling were to be installed on the route, they may be able to run at 140 mph in places.
- These trains appear to be the first of the second generation of Hitachi trains and they seem to be built for speed and a sparking performance,
- These trains will run at a frequency of two trains per hour (tph) between London and Liverpool Lime Street.
- Alternate trains will stop at Liverpool South Parkway station.
In Will Avanti West Coast’s New Trains Be Able To Achieve London Euston and Liverpool Lime Street In Two Hours?, I came to the conclusion, that a two-hour journey time was possible, when the new Class 807 trains have entered service.
London And Belfast Via Liverpool And A Ferry
Consider.
- An hour on the train to and from London will be saved compared to Holyhead.
- The ferry terminal is in Birkenhead on the other side of the Mersey and change between Lime Street station and the ferry could take much longer than at Holyhead.
- Birkenhead and Belfast is twice the distance of Holyhead and Dublin, so even a high speed craft would take three hours.
This Google Map shows the Ferry Terminal and the Birkenhead waterfront.
Note.
- The Ferry Terminal is indicated by the red arrow at the top of the map.
- There are rows of trucks waiting for the ferries.
- In the South East corner of the map, the terminal of the Mersey Ferry sticks out into the River
- Hamilton Square station is in-line with the Mersey Ferry at the bottom of the map and indicated with the usual red symbol.
- There is a courtesy bus from Hamilton Square station to the Ferry Terminal for Ireland.
There is a fourteen tph service between Hamilton Square and Liverpool Lime Street station.
This route may be possible, but the interchange could be slow and the ferry leg is challenging.
I don’t think the route would be viable unless a much faster ferry is developed. Does the military have some high speed craft under development?
Conclusion
London and Belfast via Liverpool and a ferry is probably a trip for enthusiasts or those needing to spend a day in Liverpool en route.
Other Ferry Routes
There are other ferry routes.
Heysham And Barrow-in-Furness
,These two ports might be possible, but neither has a good rail connection to London and the South of England.
They are both rail connected, but not to the standard of the connections at Holyhead and Liverpool.
Cairnryan
The Cairnryan route could probably be improved to be an excellent low-carbon route to Glasgow and Central Scotland.
Low-Carbon Flight Between The Islands Of Great Britain And Ireland
I think we’ll gradually see a progression to zero-carbon flight over the next few years.
Sustainable Aviation Fuel
Obviously zero-carbon would be better, but until zero-carbon aircraft are developed, there is always sustainable aviation fuel.
This can be produced from various carbon sources like biowaste or even household rubbish and disposable nappies.
British Airways are involved in a project called Altalto.
- Altalto are building a plant at Immingham to turn household rubbish into sustainable aviation fuel.
- This fuel can be used in jet airliners with very little modification of the aircraft.
I wrote about Altalto in Grant Shapps Announcement On Friday.
Smaller Low-Carbon Airliners
The first low- and zero-carbon airliners to be developed will be smaller with less range, than Boeing 737s and Airbus A 320s. These three are examples of four under development.
- Aura Aero Era – 19 passengers – 500 miles
- Eviation Alice – 9 passengers – 620 miles
- Faradair Aerospace BEHA – 19 passengers – 1150 miles
- Heart Aerospace ES-19 – 19 passengers – 400 km.
I feel that a nineteen seater aircraft with a range of 500 miles will be the first specially designed low- or zero-carbon airliner to be developed.
I believe these aircraft will offer advantages.
- Some routes will only need refuelling at one end.
- Lower noise and pollution.
- Some will have the ability to work from short runways.
- Some will be hybrid electric running on sustainable aviation fuel.
They may enable passenger services to some smaller airports.
Air Routes Between The Islands Of Great Britain And Ireland
These are distances from Belfast City Airport.
- Aberdeen – 228 miles
- Amsterdam – 557 miles
- Birmingham – 226 miles
- Blackpool – 128 miles
- Cardiff – 246 miles
- Edinburgh – 135 miles
- Gatwick – 337 miles
- Glasgow – 103 miles
- Heathrow – 312 miles
- Jersey – 406 miles
- Kirkwall – 320 miles
- Leeds – 177 miles
- Liverpool – 151 miles
- London City – 326 miles
- Manchester – 170 miles
- Newcastle – 168 miles
- Southampton – 315 miles
- Southend – 344 miles
- Stansted – 292 miles
- Sumburgh – 401 miles
Note.
- Some airports on this list do not currently have flights from Belfast City Airport.
- I have included Amsterdam for comparison.
- Distances to Belfast International Airport, which is a few miles to the West of Belfast City Airport are within a few miles of these distances.
It would appear that much of Great Britain is within 500 miles of Belfast City Airport.
These are distances from Dublin Airport.
- Aberdeen – 305 miles
- Amsterdam – 465 miles
- Birmingham – 199 miles
- Blackpool – 133 miles
- Cardiff – 185 miles
- Edinburgh – 208 miles
- Gatwick – 300 miles
- Heathrow – 278 miles
- Jersey – 339 miles
- Kirkwall – 402 miles
- Leeds – 190 miles
- Liverpool – 140 miles
- London City – 296 miles
- Manchester – 163 miles
- Newcastle – 214 miles
- Southampton – 268 miles
- Southend – 319 miles
- Stansted – 315 miles
- Sumburgh – 483 miles
Note.
- Some airports on this list do not currently have flights from Dublin Airport.
- I have included Amsterdam for comparison.
It would appear that much of Great Britain is within 500 miles of Dublin Airport.
I will add a few long routes, that someone might want to fly.
- Cork and Aberdeen – 447 miles
- Derry and Manston – 435 miles
- Manston and Glasgow – 392 miles
- Newquay and Aberdeen – 480 miles
- Norwich and Stornaway – 486 miles.
I doubt there are many possible air services in the UK and Ireland that are longer than 500 miles.
I have a few general thoughts about low- and zero-carbon air services in and around the islands of Great Britain and Ireland.
- The likely five hundred mile range of the first generation of low- and zero-carbon airliners fits the size of the these islands well.
- These aircraft seem to have a cruising speed of between 200 and 250 mph, so flight times will not be unduly long.
- Airports would need to have extra facilities to refuel or recharge these airliners.
- Because of their size, there will need to be more flights on busy routes.
- Routes which are less heavily used may well be developed, as low- or zero-carbon could be good for marketing the route.
I suspect they could be ideal for the development of new routes and even new eco-friendly airports.
Conclusion
I have come to the conclusion, that smaller low- or zero-carbon are a good fit for the islands of Great Britain and Ireland.
But then Flybe and Loganair have shown that you can make money flying smaller planes around these islands with the right planes, airports, strategy and management.
Hydrogen-Powered Planes From Airbus
Hydrogen-powered zero-carbon aircraft could be the future and Airbus have put down a marker as to the way they are thinking.
Airbus have proposed three different ZEROe designs, which are shown in this infographic.
The turboprop and the turbofan will be the type of designs, that could be used around Great Britain and Ireland.
The ZEROe Turboprop
This is Airbus’s summary of the design for the ZEROe Turboprop.
Two hybrid hydrogen turboprop engines, which drive the six bladed propellers, provide thrust. The liquid hydrogen storage and distribution system is located behind the rear pressure bulkhead.
This screen capture taken from the video, shows the plane.
It certainly is a layout that has been used successfully, by many conventionally-powered aircraft in the past. The De Havilland Canada Dash 8 and ATR 72 are still in production.
I don’t think the turboprop engines, that run on hydrogen will be a problem.
If you look at the Lockheed-Martin C 130J Super Hercules, you will see it is powered by four Rolls-Royce AE 2100D3 turboprop engines, that drive 6-bladed Dowty R391 composite constant-speed fully-feathering reversible-pitch propellers.
These Rolls-Royce engines are a development of an Allison design, but they also form the heart of Rolls-Royce’s 2.5 MW Generator, that I wrote about in Our Sustainability Journey. The generator was developed for use in Airbus’s electric flight research program.
I wouldn’t be surprised to find the following.
- , The propulsion system for this aircraft is under test with hydrogen at Derby and Toulouse.
- Dowty are testing propellers suitable for the aircraft.
- Serious research is ongoing to store enough liquid hydrogen in a small tank that fits the design.
Why develop something new, when Rolls-Royce, Dowty and Lockheed have done all the basic design and testing?
This screen capture taken from the video, shows the front view of the plane.
From clues in the picture, I estimate that the fuselage diameter is around four metres. Which is not surprising, as the Airbus A320 has a height of 4.14 metres and a with of 3.95 metres. But it’s certainly larger than the fuselage of an ATR-72.
So is the ZEROe Turboprop based on a shortened Airbus A 320 fuselage?
- The ATR 72 has a capacity of 70 passengers.
- The ZEROe Turboprop has a capacity of less than a hundred passengers.
- An Airbus A320 has six-abreast seating.
- Could the ZEROe Turboprop have sixteen rows of seats, as there are sixteen windows in front of the wing?
- With the seat pitch of an Airbus A 320, which is 81 centimetres, this means just under thirteen metres for the passengers.
- There could be space for a sizeable hydrogen tank in the rear part of the fuselage.
- The plane might even be able to use the latest A 320 cockpit.
It looks to me, that Airbus have designed a larger ATR 72 based on an A 320 fuselage.
I don’t feel there are any great technical challenges in building this aircraft.
- The engines appear to be conventional and could even have been more-or-less fully developed.
- The fuselage could be a development of an existing design.
- The wings and tail-plane are not large and given the company’s experience with large composite structures, they shouldn’t be too challenging.
- The hydrogen storage and distributing system will have to be designed, but as hydrogen is being used in increasing numbers of applications, I doubt the expertise will be difficult to find.
- The avionics and other important systems could probably be borrowed from other Airbus products.
Given that the much larger and more complicated Airbus A380 was launched in 2000 and first flew in 2005, I think that a prototype of this aircraft could fly around the middle of this decade.
It may seem small at less than a hundred seats, but it does have a range of greater than a 1000 nautical miles or 1150 miles.
Consider.
- It compares closely in passenger capacity, speed and range, with the De Havilland Canada Dash 8/400 and the ATR 72/600.
- The ATR 72 is part-produced by Airbus.
- The aircraft is forty percent slower than an Airbus A 320.
- It looks like it could be designed to have a Short-Takeoff-And Landing (STOL) capability.
I can see the aircraft replacing Dash 8s, ATR 72s and similar aircraft all over the world. There are between 2000 and 3000 operational airliners in this segment.
The ZEROe Turbofan
This is Airbus’s summary of the design.
Two hybrid hydrogen turbofan engines provide thrust. The liquid hydrogen storage and distribution system is located behind the rear pressure bulkhead.
This screen capture taken from the video, shows the plane.
This screen capture taken from the video, shows the front view of the plane.
The aircraft doesn’t look very different different to an Airbus A320 and appears to be fairly conventional. It does appear to have the characteristic tall winglets of the A 320 neo.
I don’t think the turbofan engines, that run on hydrogen will be a problem.
These could be standard turbofan engines modified to run on hydrogen, fuelled from a liquid hydrogen tank behind the rear pressure bulkhead of the fuselage.
If you want to learn more about gas turbine engines and hydrogen, read this article on the General Electric web site, which is entitled The Hydrogen Generation: These Gas Turbines Can Run On The Most Abundant Element In the Universe,
These are my thoughts of the marketing objectives of the ZEROe Turbofan.
- The cruising speed and the number of passengers are surprisingly close, so has this aircraft been designed as an A 320 or Boeing 737 replacement?
- I suspect too, that it has been designed to be used at any airport, that could handle an Airbus A 320 or Boeing 737.
- It would be able to fly point-to-point flights between most pairs of European or North American cities.
It would certainly fit the zero-carbon shorter range airliner market!
In fact it would more than fit the market, it would define it!
I very much believe that Airbus’s proposed zero-carbon hydrogen-powered designs and others like them will start to define aviation on routes of up to perhaps 3000 miles, from perhaps 2035.
- The A 320 neo was launched in December 2010 and entered service in January 2016. That was just five years and a month.
- I suspect that a lot of components like the fuselage sections, cockpit, avionics, wings, landing gear, tailplane and cabin interior could be the same in a A 320 neo and a ZEROe Turbofan.
- Flying surfaces and aerodynamics could be very similar in an A 320 neo and a ZEROe Turbofan
- There could even be commonality between the ZEROe Turboprop and the ZEROe Turbofan, with respect to fuselage sections, cockpit, avionics and cabin interior.
There also must be the possibility, that if a ZEROe Turbofan is a hydrogen-powered A 320 neo, that this would enable the certification process to be simplified.
It might even be possible to remanufacture a A 320 neo into a ZEROe Turbofan. This would surely open up all sorts of marketing strategies.
My project management, flying and engineering knowledge says that if they launched the ZEROe Turbofan this year, it could be in service by the end of the decade on selected routes.
Conclusion
Both the ZEROe Turboprop and ZEROe Turbofan are genuine zero-carbon aircraft, which fit into two well-defined market segments.
I believe that these two aircraft and others like them from perhaps Boeing and Bombardier could be the future of aviation between say 500 and 3000 miles.
With the exception of the provision of hydrogen refuelling at airports, there will be no need for any airport infrastructure.
I also wouldn’t be surprised that the thinking Airbus appear to have applied to creating the ZEROe Turbofan from the successful A 320 neo, could be applied to perhaps create a hydrogen-powered A 350.
I feel that Airbus haven’t fulling disclosed their thinking. But then no company would, when it reinvents itself.
T also think that short-haul air routes will increasing come under pressure.
The green lobby would like airlines to decarbonise.
Governments will legislate that airlines must decarbonise.
The rail industry will increasingly look to attract customers away from the airlines, by providing more competitive times and emphasising their green credentials.
Aircraft manufacturers will come under pressure to deliver zero-carbon airliners as soon as they can.
I wouldn’t be surprised to see a prototype ZEROe Turbofan or Boeing’s equivalent fly as early as 2024.
Short Term Solutions
As I said earlier, one solution is to use existing aircraft with Sustainable Aviation Fuel.
But many believe this is greenwash and rather a cop out.
So we must do better!
I don’t believe that the smaller zero- and low-carbon aircraft with a range of up to 500 miles and a capacity of around 19 seats, will be able to handle all the passengers needing to fly between and around the islands of Great Britain and Ireland.
- A Boeing 737 or Airbus A 320 has a capacity of around two hundred passengers, which would require ten times the number of flights, aircraft and pilots.
- Airports would need expansion on the airside and the terminals to handle the extra planes.
- Air Traffic Control would need to be expanded to handle the extra planes.
But the smaller planes would be ideal for the thinner secondary routes.
So I tend to think, that the greens will have to lump it, as Sustainable Aviation Fuel will increasingly be the only viable solution.
This will increase the need for Airbus or Boeing to develop a viable A 320 or 737-sized aircraft as soon as possible.
Air Bridges
I said earlier, that I believe using ferries between Ireland and Holyhead and new bi-mode Class 805 trains between London Euston and Holyhead could be a competitor to airlines.
- The ferries would be high speed craft capable of Holyhead and Ireland in around 90-100 minutes.
- The ferries would be zero-carbon.
- The trains would have a sixty percent reduction in carbon emissions compared to current trains on the route.
If we can skim across the water in a zero-carbon high speed craft, are there any reasons we can’t cross the water in a low- or zero-carbon aircraft.
In the next few sub-sections, I’ll suggest a few air bridges.
Glasgow
Glasgow Airport could be an ideal airport for a low or zero-carbon air bridge to Northern Ireland.
- A rail link could eventually be built.
- There is a reasonable amount of traffic.
- The distance to Belfast City Airport is only 103 miles.
As the airport serves islands and other places that could be ideal low- and zero-carbon routes, I could see Glasgow becoming a hub for battery and hydrogen-powered aircraft.
Heathrow
Heathrow must prepare itself for an uncertain future.
It will be some years before a third runway is both needed and will have been constructed.
I believe the following will happen.
- Smaller up to nineteen seat low- or zero-carbon airliners will be in service by 2025.
- From around 2024, Heathrow will get requests to refuel or charge low- or zero-carbon airliners.
- Low- or-zero- carbon A 320-size airliners will be in service by 2030.
- Most ground equipment at Heathrow like tugs and fuel bowsers will be zero-carbon.
If I were Boris or Prime Minister, I would say that Heathrow could have its third runway with the following conditions.
- All aircraft using the third runway must be zero-carbon
- All air-side vehicles must be zero-carbon.
- All vehicles bringing passengers on the last mile to the airport must be zero-carbon.
- All aircraft using the airport that are not zero-carbon must use sustainable aviation fuel.
I suspect that the conditions would be met by a large margin.
When an airport knows it is effectively going to be closed, it will make sure it survives.
Liverpool
Liverpool Airport could be an ideal airport for a low or zero-carbon air bridge to the island of Ireland.
- There is a nearby Liverpool South Parkway station, with frequent services to both the local area and places further away.
- An improved London train service starts in 2022 or 2023.
- There would need to be a people mover between the station and the airport.
- The airport can probably have piped hydrogen from across the Mersey.
- There is already significant traffic to and from the island of Ireland.
- Flight times Between Liverpool and Dublin and Belfast would be under an hour.
I also feel that Liverpool could develop lots of other low- and zero-carbon routes to perhaps Cardiff, Edinburgh, Glasgow, Norwich, Southampton and the Isle of Man.
I could even see Liverpool having a Turn-Up-And-Go shuttle service to Dublin and Belfast, with small zero-carbon planes running every fifteen minutes or so.
Manston
I wouldn’t rule out Manston as a low- and zero-carbon airport for flights to the Benelux countries and Northern France and parts of Germany.
These are a few distances from Manston Airport.
- Amsterdam – 160 miles
- Brussels – 134 miles
- Cologne – 253 miles
- Dusseldorf – 234 miles
- Frankfurt – 328 miles
- Geneva – 414 miles
- Hamburg – 396 miles
- Le Touquet – 59 miles
- Lille – 49 miles
- Luxembourg – 243 miles
- Ostend – 66 miles
- Strasbourg – 339 miles
Manston’s position on the tip of Kent gives it an advantage and I think low- and zero-carbon services could reach Cologne, Frankfurt, Geneva, Hamburg and Strasbourg.
The airport also has other advantages.
- A big electrolyser to produce hydrogen is being built at Herne Bay.
- The area is rich in wind and solar energy.
- I suspect the airspace to the East of the airport isn’t very busy and short hops to the Continent could be easy to slot in.
There is a new station being built at Thanet Parkway, which is on the Ashford and Ramsgate Line, which has regular services to London, including some services on High Speed One.
This Google Map shows the location of the airport and the station.
Note.
- The runway of Manston Airport.
- The Ashford and Ramsgate Line running across the South-East corner of the map.
- The station could be built to the West of the village of Cliffsend, which is indicated by the red arrow.
- I’m sure, a people mover or a zero-carbon bus could be built to connect the station and the airport.
There would need to be improvements in the frequency of services to and from London, but I’m sure Manston Airport could become an ideal airport for low- and zero-carbon aircraft serving the near Continent.
Southampton
Southampton Airport could be the ideal design for an airport to serve an air bridge.
- The Southampton Airport Parkway station is connected to the terminal.
- The station has numerous rail services, including a fast service to and from London.
- The airport is expanding and could make sure all works are compatible with a low- and zero-carbon future.
Southampton is not ideally placed for services to Ireland, but with low- and zero-carbon aircraft it could be ideal for running services to the Channel Islands and Western France.
Other Airports
I suspect other airports will go the low- and zero-carbon route.
Conclusion
I started this post, with the intention of writing about writing about low- and zero-carbon transport between the islands of Great Britain and Ireland.
But it has grown.
I have now come to the conclusion that there are several low- and zero-carbon routes that could be developed.
The most promising would appear to be.
- London Euston and Belfast by new Class 805 train to Holyhead and then zero-carbon high speed ferry.
- London Euston and Dublin by new Class 805 train to Holyhead and then zero-carbon high speed ferry.
- Glasgow and Belfast by train to Cairnryan and then zero-carbon high speed ferry.
- Point-to-point air routes using new small nineteen seat low- or zero-carbon airliners with a range of 500 miles.
- London Euston and Belfast by new Class 807 train to Liverpool Airport and then smaller low- or zero-carbon airliner.
- London Euston and Dublin by new Class 807 train to Liverpool Airport and then and then smaller low- or zero-carbon airliner.
- Other air bridges will develop.
But I am fairly certain by the end of the decade, there will be A320-size airlines powered by hydrogen taking us to Ireland and Western Europe.
I believe that the survival and ultimate prospering of Airbus and Boeing depends on the development of a range of zero-carbon airliners.
For this reason alone, they will succeed.
What Size Of Hydrogen Tank Will Be Needed On A ZEROe Turbofan?
I believe that Airbus’s proposed ZEROe Turbofan is designed for the same market segment as a A 320 neo.
- This aircraft has a fuel capacity of 26,730 litres of kerosene.
- This will have a mass of 21.38 tonnes.
- Each kilogram of kerosene can produce 46 Mega Joules of energy
- This means that full fuel tanks contain 983, 480 Mega Joules of energy.
- Each litre of liquid hydrogen can produce 10.273 Mega Joules of energy
This means that to carry the same amount of energy will need a 95,734.5 litres or 95.7 cubic metres of liquid hydrogen.
- This could be contained in a cylindrical tank with a diameter of 4 metres and a length of 7.6 metres.
- It would also weigh 6.93 tonnes.
As the range of the A 320 neo is given as 6,300 kilometres and that of the ZEROe Turbofan, as just 3,700 kilometres. the tank could probably be shorter.
Note that I used this Energy And Fuel Data Sheet from Birmingham University.
Conclusion
Carrying as much energy as an A 320 neo will be difficult.
- Range will be reduced.
- A new more efficient airframe will be necessary.
- As volume is probably more of a problem than weight, the fuselage might be lengthened by a few metres.
Designing the hydrogen system will be challenging, but I would be surprised if it were an insurmountable problem.
Could An A320 neo Be Rebuilt As A ZEROe Turbofan?
This post is a follow-up to ZEROe – Towards The World’s First Zero-Emission Commercial Aircraft.
I spent a lot of time yesterday, looking at YouTube videos of the following.
- Airbus A320 aircraft
- Airbus A 320 neo aircraft
- Airbus’s proposed ZEROe Turbofan aircraft
I also captured these profiles from the Airbus web site, of three members of the new Airbus A 320 neo family and the current Airbus A 320 ceo.
A 319 neo – Length – 33.84 metres – Max Passengers – 160
A 320 neo – Length 37.57 metres – Max Passengers – 194
A 321 neo – Length 44.51 metres – Max Passengers – 244
A 320 ceo – Length 37.57 – Max Passengers – 180
Note.
- The links on each variant lead to Airbus’s on-line specification.
- All three variants have a wing-span of 35.8 metres and a height of 11.76 metres.
- All variants have sharklets or blended winglets to improve awrodynamic efficiency.
- There are different door, cargo door and window layouts on all three variants.
- The cockpits, tail and wings look similar.
This capture from an Airbus video, shows the profile of the proposed ZEROe Turbofan.
Note, that the ZEROe Turbofan looks more streamlined than the A 320 neo family, with a redesigned nose and more swept-back tailfin and sharklets.
These are my thoughts on the current A 320 neo family and their relationship with the ZEROe Turbofan.
Focus On Commonality
For each variant on the Airbus web site, there is a section with this title. This is the first sentence for the A 320 neo.
Due to its 95 per cent airframe commonality with the A320ceo (current engine option) version, Airbus’ A320neo jetliner fits seamlessly into existing A320 Family fleets worldwide – which is a key factor for the company’s customers and operators.
Will Airbus follow this philosophy with the ZEROe Turbofan?
If it worked between the changeover between the existing A 320 fleets and the A 320 neo fleets, why change the policy?
The Cockpits
The cockpits of the A 320 neo and the A 320 ceo seem to have a similar profile, but the cockpit of the ZEROe Turbofan seems to have been reprofiled.
In ZEROe – Towards The World’s First Zero-Emission Commercial Aircraft, I showed these front on views of the cockpits of the ZEROe Turboprop and ZEROe Turbofan.
I questioned if the two cockpits were related.
- A single cockpit for both aircraft would surely ease manufacture, maintenance and pilot training.
- I’m no aerodynamicist, but it certainly looks that the new cockpit will reduce drag and fuel consumption.
Although the cockpit, appears to be being used in the ZEROe for the first time, I would expect it is already under development and might feature in any later version of the A 320 neo.
The Fuselages
The fuselage width for both the A 320 neo family and the A 320 ceo are all 3.95 metres, with a maximum cabin width of 3.70 metres.
I would expect that the ZEROe Turboprop and the ZEROe Turbofan will also use this width.
Airbus use a design called Cabin-Flex to get the most out of the interior space in the A 320 neo. This paragraph is from the Wikipedia section, that is entitled Cabin-Flex.
By permanently replacing the second door pair in front of the wing (R2/L2) with a new second pair of overwing exits, the capacity of the A321neo is increased from 220 seats to 240 seats and fuel efficiency per seat is increased by 6%, exceeding 20% together with the new engines and the sharklets. The modifications should weigh 100 kg more.[82] Initial A321neos have the A321ceo exit door configuration with four exit door pairs until the Airbus Cabin-Flex (ACF) layout can be selected.
After reading the whole section, it looks to me, that the A 320 neo fuselage is designed, to be all things to all airlines and doors and seats can be arranged to fit any requirements.
In the ZEROe Turbofan, there is a large liquid hydrogen tank behind the rear pressure bulkhead, which could be brought forward a bit to give more space and hydrogen capacity.
I suspect there will be a lot of commonality between the fuselage of the A 320 neo family and that of a ZEROe Turbofan.
I spent a lot of time, as a child building Airfix models of aircraft and it may be too much of a simplification to think of these carbon-composite airliners, as giant Airfix models.
But I wouldn’t be surprised that just like the previous generation of aluminium airliners, they can be remanufactured into something different, just like British Airways Tristars, ended up as tanker-aircraft for the RAF.
I wouldn’t be surprised to find, that later A 320 neo fuselages will be able to be remanufactured into fuselages for ZEROe Turbofans.
Comparing The Fuselages Of The A 320 ceo, A 320 neo And ZEROe Turbofan
These are the three fuselage profiles.
A 320 ceo
A 320 neo
ZEROe Turbofan
Aircraft balance on the wings, which if I remember what little I know about aircraft aerodynamics and design, apply their lift forces to the centre of gravity of the aircraft.
I know that the profile of the ZEROe is to a different scale, but three things are apparent.
- The windows at the rear don’t go as far back, as they do in the two existing designs. But then there is no need for windows around the hydrogen tank.
- The hydrogen tank could be as long as a quarter of the length of the fuselage.
- The front section of the aircraft appears longer.
The longer front section would balance the weight of the hydrogen tank.
The passengers would also help to balance the weight of the tank, by being placed further forward.
There must be the possibility of creating a larger capacity and longer range variant of the ZEROe design, by adding a larger hydrogen tank and further stretching the nose.
Airbus have been stretching these designs for years, so I suspect that they have plans for a large number of possible variants of the ZEROe Turbofan.
According to the Wikipedia entry for the A 320 neo family, there are already five civil versions of the A 320 neo; A 319 neo, A 320 neo, A 321 neo, A 321LR and A 321XLR, plus corporate and military versions.
Add in the Cabin-Flex interior and the various A320s and the ZEROe to come, must be one of the most flexible transport systems in history.
The Tailplanes
As they are of the same height and look similar, the tail sections of the A 320 neo and A 320 ceo families could be almost identical, but the tail section of the ZEROe Turbofan appears to be slightly more swept-back and perhaps more aerodynamic.
As the ZEROe Turbofan, also appears to have had a nose-job, I would suspect that Airbus have a redesigned fuselage in the works to squeeze more fuel-efficiency out of this family of already very frugal aircraft. Could this feature the more aerodynamic tailplane?
Could this advanced fuselage feature in a later version of the A 320 neo?
I also feel, that the functionality of the tailplane on the ZEROe Turbofan will need to be little different to that on the earlier planes.
- The plane is still powered by two turbofan engines on the wings.
- Rudder forces, with an engine failure on one side, will still be the same.
The big difference will be that the fuel is at the back of the fuselage rather than in the wings, which will affect the balance.
Will this effect the design of the tailplane? I don’t think it will in a large way, as Airbus seem to have lengthened the nose to compensate.
The Wings
All the wings with sharklets for the A 320 neo family and the A 320 ceo have the same wingspan of 35.8 metres, so I would expect they are all substantially similar.
But there is one big difference in that the wings of the conventionally-powered aircraft are full of fuel.
This would probably mean that much of the wing stresses in the ZEROe Turbofan would be like an A 320 neo flying with little fuel in the wing tanks. As some aircraft in the A320 neo family have fuselage tanks, Airbus can even test the wing forces and handling in a real aircraft.
But it does look that Airbus will have little trouble designing, building and certifying the wing of a ZEROe Turbofan.
There is a minor difference in that the sharklets for the ZEROe Turbofan are more extreme.
But then as I said earlier, is there a new more aerodynamic airframe for the A 320 neo in the works?
Conclusion
I very much feel that there will be a route to convert some or all of the A 320 neo aircraft to hydrogen power.