Electric air service next year.
Thread Starter
Electric air service next year.
https://news.stv.tv/east-central/foo...from-edinburgh
(I was unable to and this to Hyundai Australian thread.)
(I was unable to and this to Hyundai Australian thread.)
Last edited by Maoraigh1; 19th Jul 2023 at 18:09. Reason: Url didn't work.
No, not electric air service next year
https://news.stv.tv/east-central/foo...from-edinburgh
(I was unable to and this to Hyundai Australian thread.)
(I was unable to and this to Hyundai Australian thread.)
Ecojet airline aims to fly hydrogen-electric aircraft from 2025
To add to DR's post:
Not only has no one certified a H2-Electric aircraft for commercial, the certification standards/rules have not even been established. Storage of large amounts of liquid or high pressure H2 in the proximity of paying passengers is a far from trivial problem.
Add to that the extra caution the regulatory agencies have adopted in the aftermath of the MAX fiasco, five year is probably the minimum to obtain certification of such a beast - personally I'll be surprised to see commercial cert of such aircraft before 2030.
"Start-up" aircraft companies have a long history of pie-in-the-sky projections. Actually delivery of said aircraft is rare, regardless of the time frame.
Not only has no one certified a H2-Electric aircraft for commercial, the certification standards/rules have not even been established. Storage of large amounts of liquid or high pressure H2 in the proximity of paying passengers is a far from trivial problem.
Add to that the extra caution the regulatory agencies have adopted in the aftermath of the MAX fiasco, five year is probably the minimum to obtain certification of such a beast - personally I'll be surprised to see commercial cert of such aircraft before 2030.
"Start-up" aircraft companies have a long history of pie-in-the-sky projections. Actually delivery of said aircraft is rare, regardless of the time frame.
Thread Starter
Copied from STV:
"Flights across the UK will commence in early 2024, starting with routes to and from Edinburgh and expanding to mainland Europe shortly after, with long-haul flights planned for the future."
(I'm not a believer - just quoting STV.)
"Flights across the UK will commence in early 2024, starting with routes to and from Edinburgh and expanding to mainland Europe shortly after, with long-haul flights planned for the future."
(I'm not a believer - just quoting STV.)
I just noticed this bit:
So, unlike conventional aircraft which become lighter as they burn off fuel (or battery powered which have a pretty much constant weight), this will get significantly heavier the longer it cruises (until it presumably dumps the accumulated water as it descends).
Should make for some interesting performance calculations
.
BTW, since they intend to start operations using good old kerosene, will the brand it "Pretend" Ecojet until they actually convert to H2 fuel?
Once converted, the aircraft will operate with the same power output as before, but with a one-hundred percent reduction in CO2 emissions," reads the press release. The water produced as a byproduct of the process will be captured and released at lower altitudes.
Should make for some interesting performance calculations
.BTW, since they intend to start operations using good old kerosene, will the brand it "Pretend" Ecojet until they actually convert to H2 fuel?
Yes, they've not managed to cut and paste the press release properly.
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Besides the difficulty of producing a hydrogen driven propeller aircraft with the power and range does anyone know of an electric engine that will produce the revs and power needed for a jet?
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the certification standards/rules have not even been established. Storage of large amounts of liquid or high pressure H2 in the proximity of paying passengers is a far from trivial problem.
I attended the ASTM convention in Prague in March where the new certification standards for this were one of the topics. We're not there yet as certifiers....
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H2 ignites very easily and produces no visible flames which reach 2000 degrees C in microseconds. Tank leaks ( or failure after an accident ) are likely to cause massive human loss of lives in an airliner within a couple of seconds . . the fire regulations are likely to be going to be looked at very carefully and could take some time . .
As to the CO2 neutral H2 production ( no yet possible) it is another debate that might come up at one point in the near future .
As to the CO2 neutral H2 production ( no yet possible) it is another debate that might come up at one point in the near future .
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Harbour Air demonstrated a modified to electric plane for their services in 2019. They don’t expect to get certification until 2025. Good luck to anyone that manages to do it any faster - particularly if they are going to use hydrogen as a fuel. https://harbourair.com/earth-day-eplane-update/
Harbour Air demonstrated a modified to electric plane for their services in 2019. They don’t expect to get certification until 2025. Good luck to anyone that manages to do it any faster - particularly if they are going to use hydrogen as a fuel. https://harbourair.com/earth-day-eplane-update/
That should make the cert path much easier than having to store large quantities of H2. The downside is that battery weight will make other than short range operations somewhere between impractical and impossible.
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My understanding is that Harbour Air is using batteries for their electric plane.
That should make the cert path much easier than having to store large quantities of H2. The downside is that battery weight will make other than short range operations somewhere between impractical and impossible.
That should make the cert path much easier than having to store large quantities of H2. The downside is that battery weight will make other than short range operations somewhere between impractical and impossible.
I predict there will be a manned base on Mars before there will be a viable zero emission 19 seat airliner, let alone one with 70 seats
A lesson learned from O'Leary, they made the media and lots of free publicity
However, expect slower cruise speeds. If I'm not mistaken, turbine powered aircraft (especially the multi-engined ones) have a best range velocity much higher than the best glide velocity of the airframe, due to the peaked efficiency curve of the turbine engine. Electric motors and piston engines have an almost flat efficiency curve, hence best-range velocity close to best-glide velocity of the airframe.
Happy to be corrected, I guess the huge drag of an INOP turbofan complicates the "best-glide" issue here...
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US Navy warships of WW2 used turbo electric drive. I think there is no fundamental problem in producing an electric engine that will give any amount of power you want. The problem is getting enough angry pixies marching into that engine. Batteries won't do it, nor will hydrogen. Synthetic hydrocarbons might be a possibility.
Certificationwise, EASA has already certified first electric driven serial production airplane, albeit in Light Sport Airplane category. See: https://www.pipistrel-aircraft.com/s...velis-electro/
The funny thing is, that plane is certified, but there is no certification standard for maintenance organizations and personnel yet - it has been adressed with temporary exceptions.
The funny thing is, that plane is certified, but there is no certification standard for maintenance organizations and personnel yet - it has been adressed with temporary exceptions.
Certificationwise, EASA has already certified first electric driven serial production airplane, albeit in Light Sport Airplane category. See: https://www.pipistrel-aircraft.com/s...velis-electro/
The funny thing is, that plane is certified, but there is no certification standard for maintenance organizations and personnel yet - it has been adressed with temporary exceptions.
The funny thing is, that plane is certified, but there is no certification standard for maintenance organizations and personnel yet - it has been adressed with temporary exceptions.
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I think the main issue is that the pipistrel can only fly 50 min + 10 min VFR reserve (and those are optimistic numbers). No way you could transport paying passengers.