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Plans For London-Paris Electric Flight in 'Next Decade' Unveiled (telegraph.co.uk)

A start-up has unveiled ambitious plans to offer an electric-powered commercial flight between London and Paris in the next ten years. From a report: Wright Electric believes the proposed low-emission electric plane would offer a cheaper alternative to jet fuel for airlines and consumers. However, the start-up's bid to revolutionize short-haul flights relies on the continued advancement of battery technology. The company, who pitched to investors this week, would be forced to switch to a hybrid of aviation fuel and electricity if the advances in battery technology fail to materialise.

90 comments

  1. Please don't let Samsung make the batteries....... by Anonymous Coward · · Score: 1

    You know what will happen... I'd rather fly Apple airlines, only 1 type of drink is offered (Apple juice), 1 movie to watch (Pirates of Silicon Valley) & only 1 phone allowed onbaord (iPhone gold members club)

  2. No chance. by HornWumpus · · Score: 5, Insightful

    They would have to have the airplane largely designed and in early initial prototype to have it certified for commercial service in 10 years. This is pure bullshit seeking dumb investor money.

    I approve: 'A fool and their money were lucky to get together in the first place.'

    --
    John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
    1. Re:No chance. by squiggleslash · · Score: 4, Funny

      Hence the London to Paris route of the first phase of this project, as right now power cord technology is sufficiently advanced that they can build cables of that length that won't snap. The battery powered planes will come later.

      --
      You are not alone. This is not normal. None of this is normal.
    2. Re:No chance. by Anonymous Coward · · Score: 0

      No it's simple you see.

      You only offer your tickets to airline pilots and get them all to file an individual notice of variation

    3. Re:No chance. by fluffernutter · · Score: 1

      And I was thinking the plane would fly with a kite behind it, outfitted with a skeleton key in order to catch dormant "sky power".

      --
      Laws are rules for the court, but merely a bottom bar to hit for life. Think beyond laws in your actions always.
    4. Re:No chance. by KiloByte · · Score: 1

      I don't think you can make a power cord long enough to fly out of Europe.

      --
      The creatures outside looked from Alt-Right to Antifa; but already it was impossible to say which was which.
    5. Re:No chance. by HornWumpus · · Score: 1

      Paris/London. They just need to get altitude and glide the rest of the way.

      Also: Whoosh.

      --
      John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
    6. Re:No chance. by Anonymous Coward · · Score: 0

      Well, they appear to be sticking to the correct formula.

      Silly name trying desperately to cash in on a related historical figure? Check.

      No business plan? Check.

      Implied reliance on government loans and assistance? Check and check.

      Hooray for "green tech"!

    7. Re:No chance. by squiggleslash · · Score: 3, Funny

      Actually the real problem right now is that they're concerned the changes in air pressure and water vapor may cause premature degradation of the micro-USB connector on the end of the cord.

      --
      You are not alone. This is not normal. None of this is normal.
    8. Re:No chance. by Neuronwelder · · Score: 1

      You may ironically have a good idea here. If they use power cords to get the planes up into the air on takeoffs and drop off, you could save a lot of battery drainage.

    9. Re: No chance. by Type44Q · · Score: 1

      I think he meant bands, not cords.

    10. Re:No chance. by Anonymous Coward · · Score: 0

      My first thought was a Zeppelin. Not as weight constrained so could carry the huge batteries necessary.

    11. Re:No chance. by welshie · · Score: 4, Informative

      Actually, you can already get from London to Paris very efficiently with electric power, and yes, there is a power cord running all the way. It's called the Eurostar trains, and go from city centre to city centre quickly, with no silly faffing around with airports.

    12. Re:No chance. by K.+S.+Kyosuke · · Score: 1

      Over land, power beaming could be an interesting option. Yes, perhaps in distant future, but still...

      --
      Ezekiel 23:20
    13. Re:No chance. by Anonymous Coward · · Score: 0

      They're going to use one of those curly power cable type cables and get the return flight for free ;-)

    14. Re:No chance. by Maritz · · Score: 1

      Don't call a Brit European. Gets them all hot.

      --
      I do not want your cheap brainburning drugs. They are useless for work. And I am a working man today.
  3. Plans for Planes by Chmarr · · Score: 0

    In my experience, planes fly better than plans, so when they turn their plain plan into a plane, then I'll be pleased, but until then, I'll.... plass.

    1. Re:Plans for Planes by TWX · · Score: 1

      Heh. All my plans are up in the air already...

      --
      Do not look into laser with remaining eye.
    2. Re:Plans for Planes by serviscope_minor · · Score: 1

      Such things are known in the industry as "paper aeroplanes".

      --
      SJW n. One who posts facts.
    3. Re:Plans for Planes by rtb61 · · Score: 1

      How about a more cogent argument. Sure electric planes will be possible, the real problem will be speed. That is of course the speed of the plane itself, this is a real double negative outcome, not only will passengers dislike the slow speed of the plane but it will naturally make it much more expensive. The longer the plane takes to make a flight, the less flights in can make and the greater the impact of that slow flight upon the capital return for that investment. Compare it what will be it's major competitor, high speed rail. The advantages of rail, it will be faster, it can provide high quality services much cheaper than a plane (a private cabin). About the only place for electric planes is the private market as legislation is likely to be introduced the excesses of the fuckwit class who desire to consume and pollute as much as possible, so private jets will likely end up being banned, straight up no excuse for that disgusting excess.

      --
      Chaos - everything, everywhere, everywhen
    4. Re:Plans for Planes by dbIII · · Score: 1

      People used to think that, so Concorde was built, but it turned out that not very many people thought speed was enough of a problem to actually pay for it.
      London to Paris is less than 350 kilometres.
      Even a plane flying at 350 kilometres per hour or a bit less is going to take less time getting from one to the other than driving a car across either of those cities.

    5. Re:Plans for Planes by Sique · · Score: 1

      Especially because cars still have problems to cross at least 20 miles of sea, and a bridge does not exist.

      --
      .sig: Sique *sigh*
    6. Re: Plans for Planes by Anonymous Coward · · Score: 0

      How about a tunnel which does exist?

      https://en.wikipedia.org/wiki/Channel_Tunnel

    7. Re:Plans for Planes by ArsenneLupin · · Score: 1

      Especially because cars still have problems to cross at least 20 miles of sea, and a bridge does not exist.

      So these guys ought to try to sell us a bridge instead...
      ... methink, actually they do :-)

    8. Re: Plans for Planes by Sique · · Score: 1

      It exists, but it's a train tunnel. So you have to wait until your car is loaded on the train, and then you have to wait until your car is unloaded from the train. You are not actually driving your car through the tunnel.

      --
      .sig: Sique *sigh*
    9. Re:Plans for Planes by dbIII · · Score: 1

      driving a car across either of those cities

      Especially because cars still have problems to cross at least 20 miles of sea, and a bridge does not exist.

      Twenty miles of sea inside Paris? That's in-Seine.

    10. Re:Plans for Planes by rtb61 · · Score: 1

      You know what is the biggest cost for trains, not the trains it is the tracks. So a smart new business opportunity would be camper train wagon. The Rail companies opening camper parks adjacent to major train links, where people can live in rail campers, a wagon all of their own, one they never need tow, in fact the car can be carried by the same train that is towing their camper.

      New lifestyle for a transient population and it fills empty train tracks with more traffic. Need to shift you rail camper, just book it in, quick tow to junction and they hook you up, load up you compact car which no longer needs to pull a caravan and away you go to your new rail camp site, dropped off and away you go. You can travel in your camper, watching the country go by no muss, no fuss and depending on design it could go high speed.

      Filling empty train tracks with a major business opportunity. Likely though light weight carriages need to be design along with a lighter engine and they simply use the track between normal passenger and cargo trains.

      --
      Chaos - everything, everywhere, everywhen
  4. 10 years by Anonymous Coward · · Score: 4, Funny

    10 years you say?

    Let me consult the chart.

  5. Re:Please don't let Samsung make the batteries.... by TWX · · Score: 1

    I think for what they'll need the batteries will come out a a really huge factory. A Megafactory if you will.

    --
    Do not look into laser with remaining eye.
  6. How dull by Anonymous Coward · · Score: 0

    May make the sanctimonious eco-liberals happy though.

    1. Re:How dull by amiga3D · · Score: 1

      I think it might make greedy capitalists happy if it would work. What's better than charging batteries with Solar power and swapping them in and out of aircraft. No more jet fuel with all the hazards and transport costs. Not to mention price fluctuations. The only problem is that battery technology is probably 20 or 30 years away from making something like this possible. Still, I wish them luck.

    2. Re:How dull by Maritz · · Score: 1

      Takes a special kind of idiot to be unable to divorce science from politics. Did the devil put the fossils in the rocks too? Yeah? lol.

      --
      I do not want your cheap brainburning drugs. They are useless for work. And I am a working man today.
  7. Of course! by Anonymous Coward · · Score: 0

    We'll just 3D print an EM drive in it the plane, right?

  8. Reno Air by ghoul · · Score: 1

    Base it out of Reno. On outwards legs it will carry Tesla Battery packs from the Tesla Reno Battery factory. On inwards legs it will use Jet Fuel. So Battery Packs get delivered to where they are needed while doing something usefull

    --
    **Life is too short to be serious**
    1. Re:Reno Air by skids · · Score: 1

      Well, electric motors are unlikely to run very well on jet fuel, and a generator would take up weight.

      But, if they only took passengers on outbound flights, they might be able to limp back on less battery packs than they went out with.

    2. Re:Reno Air by HornWumpus · · Score: 2

      Could you build a turbine that runs on flaming batteries? They have CTs that run on powdered coal (at least a % after start).

      --
      John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
  9. I'll take forced to switch to a hybrid by thinkwaitfast · · Score: 2

    aviation fuel and electricity as the advances in battery technology fail to materialise for 50, Alex.

    1. Re:I'll take forced to switch to a hybrid by HornWumpus · · Score: 2

      I'll take: Never gets off the ground, no prototype ever built. Executives at startup pay themselves all the capital and fold the venture.

      --
      John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
    2. Re:I'll take forced to switch to a hybrid by amiga3D · · Score: 1

      It's never possible, until someone does it.

    3. Re:I'll take forced to switch to a hybrid by HornWumpus · · Score: 1

      10 years. Civil aviation.

      Some things are genuinely _impossible_. Other things are obvious scams. This is both.

      --
      John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
    4. Re:I'll take forced to switch to a hybrid by amiga3D · · Score: 1

      The 10 years is unlikely, not impossible.

    5. Re:I'll take forced to switch to a hybrid by HornWumpus · · Score: 1

      Look how long it takes an experienced company (Boeing or Airbus) to get a new airplane certified with nothing newer than updated engines and fuselage stretch.

      This company has zero experience and are claiming they will do something new (and impossible with today's batteries). 10 years is _impossible_.

      Which doesn't even start into all the obvious signs of scam.

      If you believe it, don't let me stop you from investing your money. Invest it all, go for it.

      --
      John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
  10. Mmmmm. by Anonymous Coward · · Score: 0

    Bullshit.

    1. Re:Mmmmm. by Anonymous Coward · · Score: 0

      What? We live in the 3D printed post-Luddite future! We have 3D printed cars, 3D printed houses, EM drives, Moon colonies, asteroid mining, space-based solar power! Yes that's right, Solaren delivered on its 2016 goal of beaming power from space!

      All we need is to beam power from space to 3D printed planes made from privately-mined colonized asteroids!

      The future is awesome!

    2. Re:Mmmmm. by Anonymous Coward · · Score: 0

      Are you quoting a '50's Popular Mechanics?

    3. Re:Mmmmm. by Maritz · · Score: 1

      It'll never fly.

      --
      I do not want your cheap brainburning drugs. They are useless for work. And I am a working man today.
  11. antigravity by Anonymous Coward · · Score: 0

    They also have plans for antigravity-powered service between New York and Paris in 10 years. If antigravity fails to materialize, they'll use jet fuel.

  12. Makes Good Sense by JimSadler · · Score: 1

    Short hops on passenger planes might be perfect for batteries now in development. Less noise and less pollution and maybe quite a weight reduction due to not carrying fuel and engines might make quite a difference. I do wonder if a bad landing would be more lethal than in a liquid fueled craft.

    1. Re:Makes Good Sense by HornWumpus · · Score: 2

      You should invest your entire retirement savings with them. It's a sure thing.

      --
      John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
    2. Re:Makes Good Sense by glenebob · · Score: 1

      Weight reduction using batteries in airplanes is nowhere on the horizon. Compared to ground vehicle drive trains, jet engines have a great power to weight ratio, and they use no transmission. Replacing a modern jet with a motor and propeller is in itself a step backward.

      On the other hand, airplanes spend a lot of time above the clouds and have a lot of surface area, so perhaps solar panels could provide a measurable range boost on day flights. But I kind of doubt it; solar panels have a terrible power to weight ratio.

      This is dumb to even think about until batteries improve dramatically. In fact I suspect it may never actually work, because as technology progresses, it will become viable to manufacture carbon neutral fuel for use in airplanes.

    3. Re:Makes Good Sense by Richard_at_work · · Score: 2

      The weight reduction from not having to carry the turbine portion of the engine (you still need to carry the fan part) is *massively* offset by the fact that you carry your "fuel" the entire distance of the trip, 100%. Current planes get more efficient the longer they fly, as they burn off their fuel they get lighter - replace that fuel with a storage system like batteries and your plane is going to weigh as much on landing as it did on takeoff, with no efficiency gains en route, so the energy needed will be constant throughout the flight.

      And yes, this is still an issue on short haul flights.

      Don't kid yourselves, batteries for powering aircraft is a non-starter, the economics simply dont work.

    4. Re:Makes Good Sense by dunkelfalke · · Score: 1

      jet engines do have several transmissions - generators, fuel pumps and hydraulics have to be powered somehow. some engines even have geared fans.

      --
      "It's such a fine line between stupid and clever" -- David St. Hubbins, Spinal Tap
    5. Re:Makes Good Sense by angel'o'sphere · · Score: 1

      This is dumb to even think about until batteries improve dramatically.
      Actually we already have plenty of electric powered hobbyist air crafts.
      So the "idea" is not dumb. It might be technically not possible to do cost effective electric powered flights in 10 years, but we are pretty close to be able to do that for short range flights.

      --
      Cost free eBook I read (by iBook/Kobo/Amazon/ObookO/Gutenberg etc.): "The Green Odyssey" by Philip Jose Farmer.
  13. The mass of batteries never changes by Anonymous Coward · · Score: 5, Insightful

    The problem with all battery operated vehicles is that as the batteries get depleted, their mass never changes. With Jet fuel, gasoline, etc, as the fuel gets depleted, the mass is reduced, and thus the energy required to move the vehicle is reduced.

    1. Re:The mass of batteries never changes by Anonymous Coward · · Score: 0

      That's why you deplete the batteries one at a time, then jettison them once empty. A slow automated freighter trails behind the plane, collecting the batteries discarded into the ocean, and returns them to shore for recharging. I could also foresee some battery that creates a more-buoyant compound as it discharges, effectively lightening its own weight once depleted.

    2. Re:The mass of batteries never changes by Anonymous Coward · · Score: 1

      Horseshit. By definition, a charged battery has to 'mass' more than a depleted one.

      Why? Exactly the same reason a compressed spring under tension will 'weigh' more than it does under no compression: E=mc. If there's stored energy there, it has to contribute.

      Granted, it's probably not even measurable outside a laboratory with the right (expensive) equipment... but it's there.

      Which makes the incorrectness of your statement not at all relevant to the subject at hand. Pedantry, ho!

    3. Re:The mass of batteries never changes by Anonymous Coward · · Score: 0

      Yes you are an annoying pedantic twat.

    4. Re:The mass of batteries never changes by Anonymous Coward · · Score: 0

      So I take it you don't want to invest in my new electric rocket ship?

    5. Re:The mass of batteries never changes by Kjella · · Score: 1

      The problem with all battery operated vehicles is that as the batteries get depleted, their mass never changes. With Jet fuel, gasoline, etc, as the fuel gets depleted, the mass is reduced, and thus the energy required to move the vehicle is reduced.

      True, but it's hardly like a rocket where only a tiny fraction of the launch weight reaches the destination. The specs for the 747-400F (freight version) says 164 ton dry weight, 124 ton capacity, 397 ton takeoff weight. So max'ed it's (164+124)/397 = 73% plane and cargo, 27% fuel. The benefit of reduced weight will be on a weak exponential but if we round up 27%/2 to an average 15% lower fuel consumption compared to a plane that was constantly refilled by a tanker we've probably been generous. So if we could design an electric plane with 85% of the performance of a jet plane and recharge it with cheap, clean power from the grid I think it would be a smashing success. Of course we're nowhere close to that, but it's because the energy density of batteries to jet fuel sucks, not because the jet plane loses weight.

      --
      Live today, because you never know what tomorrow brings
    6. Re:The mass of batteries never changes by GuB-42 · · Score: 1

      It is awfully true for rockets, not so much for planes.
      After a quick calculation, it appears that only about 1% of the fuel is converted into kinetic and potential energy. Which meant that 99% of it is used to overcome drag. Drag is a function of speed, surface area, air density, and the shape of the plane, not its mass.
      Rockets are another matter entirely. That's because fuel is used as a reaction mass. As a result, they are constrained by momentum, which is why we need ridiculously large rockets to launch ridiculously small stuff in space. Planes just use surrounding air as a reaction mass.

      Weight matters for aerodynamics, and it is a very complex subject that goes well beyond simple energy considerations. A good example is some gliders which have water ballasts to increase their weight. It allows them to glide more efficiently at high speeds at the expense of losing altitude faster at slow speeds. These ballasts can be jettisoned if the flight conditions change, and also before landing in order to limit stress on the airframe.

    7. Re:The mass of batteries never changes by K.+S.+Kyosuke · · Score: 1

      I think it's still present, at least in the form the tipping point for decreasing fuel consumption per unit of range, at about 3000 nautical miles or so.

      --
      Ezekiel 23:20
    8. Re:The mass of batteries never changes by Anonymous Coward · · Score: 0

      you can always parachute out the dead cells.

    9. Re: The mass of batteries never changes by Anonymous Coward · · Score: 0

      What you write is true for land-based transports - a plane eill need increased lift for increased mass. More lift means more drag, either as increased angle of attack or an increased eing surface area.

      On gliders the extra weight is used when your "engines are too large", meaning the air is mobing upwards faster than your optimal descent. Without water ballast you would soar upwards or open the brakes. With ballast the plane is not as efficient (it needs more power to stay in the air) but you can direct your max.speed vector forwards instead of down while braking.

    10. Re:The mass of batteries never changes by cyn1c77 · · Score: 1

      The problem with all battery operated vehicles is that as the batteries get depleted, their mass never changes. With Jet fuel, gasoline, etc, as the fuel gets depleted, the mass is reduced, and thus the energy required to move the vehicle is reduced.

      Yeah, that's a small factor for air-breathing vehicles.

      But you missed the big point, which is that the oxidizer is not being carried at all.

      This is good because you usually need a lot (of moles) of oxidizer for each mole of fuel.

  14. Brilliant! by s.petry · · Score: 1

    I hope you filed a patent on this so you can have a Startup too!

    --

    -The wise argue that there are few absolutes, the fool argues that there are no probabilities.

    1. Re:Brilliant! by fluffernutter · · Score: 1

      Good idea! Don't tell anyone about it ok?

      --
      Laws are rules for the court, but merely a bottom bar to hit for life. Think beyond laws in your actions always.
    2. Re:Brilliant! by s.petry · · Score: 1

      Too late: Patent "FU 20170322 A1" A Kite Powered Plane - AKA G0TCH4 81TCH

      --

      -The wise argue that there are few absolutes, the fool argues that there are no probabilities.

    3. Re:Brilliant! by fluffernutter · · Score: 1

      Oh I always JUST MISS THESE! The world hates me.

      --
      Laws are rules for the court, but merely a bottom bar to hit for life. Think beyond laws in your actions always.
  15. Who needs batteries? by Ichijo · · Score: 1

    Just launch the aircraft into the upper atmosphere from a railgun catapult built up the side of a mountain. Then it could use electricity generated by the propellers during descent to move the control surfaces.

    --
    Any sufficiently unpopular but cohesive argument is indistinguishable from trolling.
    1. Re:Who needs batteries? by Anonymous Coward · · Score: 0

      The tech specs for passenger aircraft have that pesky requirement for the passengers to be delivered alive at the destinations.

    2. Re:Who needs batteries? by Baron_Yam · · Score: 1

      I think a magnetic launch assist for commercial jets would be a fantastic idea. Jets can burn 40% more fuel during take-off than during cruise, and they're going a lot slower while doing it. A nice push to get them started wouldn't be the worst thing in the world.

      Maybe even use a proper rail and have a launch cradle you can position under the plane so it can ride 'gear up'.

      It'd be interesting to look at a cost/benefit analysis of such a system.

    3. Re:Who needs batteries? by Anonymous Coward · · Score: 0

      The US Navy has already deployed something similar.

      https://en.wikipedia.org/wiki/Electromagnetic_Aircraft_Launch_System

  16. Chunnel by tomhath · · Score: 1

    Didn't they build the chunnel so electric trains could make that run? Seems silly to try and compete on that particular route.

    1. Re:Chunnel by Anonymous Coward · · Score: 0

      Seriously. Regular planes barely make sense from Paris to London. It was always a toss up for me on that particular route (mostly where I wanted to get off at the end of it). At least propose it somewhere without a super convenient and just as fast rail line (just as fast considering not having to show up to a train an hour+ early.)

    2. Re:Chunnel by bugs2squash · · Score: 1

      No they built the train to tow the electric glider into the air

      --
      Nullius in verba
    3. Re:Chunnel by danbert8 · · Score: 1

      Yes, and the Eurostar runs several daily Paris to London runs and it's a pretty short trip at around 2-1/2 hours. I can't see how an electric plane in 10 years could compete with an electric train that already exists.

      --
      Yes it's an anecdote! Were you expecting original research in a Slashdot comment?
  17. Re:NSA whistle blower blows lid on Trump intercept by bongey · · Score: 0

    The whistle blower produced hard evidence that shows Comey or Mike Rogers was lying or completely incompetent in sworn testimony to congress.
    Oh don't give flying fuck if it is off topic, Slashdot editors are blocking the story.

  18. What about hydrogen fuel cells? by Gravis+Zero · · Score: 1

    I don't know the answer to this, so please be gentle. What about using hydrogen fuel cells for airplanes? The big problem with hydrogen fuel cells is that they require energy to breakdown water and different tubes for refueling. On the upside, it's high density chemical energy and you could safely jettison all of it before a crash which would save lives since (to my knowledge) the majority of fatalities in (survivable) plane crashes are from smoke inhalation from burning jet fuel.

    Since power can be derived from Sol and they would be changing equipment anyway, why not use hydrogen fuel cells?

    --
    Anons need not reply. Questions end with a question mark.
    1. Re:What about hydrogen fuel cells? by joe_frisch · · Score: 1

      The power density of present day fuel cells isn't very high. Power density is very important for aircraft because carrying extra weight uses more fuel. Its surprising but old fashioned aircraft piston engines are more efficient than modern jets (eg, more power produced per fuel burned). Modern planes use jets because they are very much lighter for the same power, so the overall aircraft efficiency is better (and the planes can fly faster).

      I remember seeing design studies of hydrogen fueled aircraft where the hydrogen is burned in conventional engines. Even though the hydrogen is very light (which should be a big win for aircraft) the weight of the tanks and the extra volume (liquid hydrogen is very low density) made it not competitive with jet fuel.

      Of course as technology changes these trade-offs could change.

    2. Re:What about hydrogen fuel cells? by dunkelfalke · · Score: 1

      that is comparing apples to oranges. a turboprop flying the same speed is more efficient than a piston engine aircraft.

      --
      "It's such a fine line between stupid and clever" -- David St. Hubbins, Spinal Tap
    3. Re:What about hydrogen fuel cells? by joe_frisch · · Score: 1

      The turboprop aircraft is more efficient, the turboprop engine is less efficient when you remember that kerosene is higher density than gasoline but its pretty close. The Wikipedia link doesn't have recent engines of either type, but gives a hint: https://en.wikipedia.org/wiki/...

      My copy of Raymer (Aircraft design, a conceptual approach) gives a typical specific fuel consumption for a turbo prop as 0.5lb/hr-hp, and 0.4 for a piston. The detailed charts I have for a modern light aircraft piston engine (IO550) gives about 0.36. I don't have detailed numbers for a turboprop.

      It doesn't really matter, the turboprops are so much lighter for the same power that they result in higher efficiency aircraft for all but the smallest planes. (turboprops don't scale well below about 1000hp).

    4. Re:What about hydrogen fuel cells? by dunkelfalke · · Score: 1

      At higher altitudes turboprops should be also more efficient as an engine because piston engines either lose power to the supercharger or to the less dense air.

      --
      "It's such a fine line between stupid and clever" -- David St. Hubbins, Spinal Tap
    5. Re:What about hydrogen fuel cells? by joe_frisch · · Score: 1

      That's probably true, I don't know much about piston engines at high altitude because they are rarely used there. A supercharger does lose energy. I think in principal a turbocharger doesn't lose energy, but in practice the intercooler is inefficient (throws away energy). I don't know how that balances against the higher combustion temperature in a piston engine.

      I guess in some ways a turbo-compounded engine (supercharger and expansion turbine coupled to the main drive) smoothly blends into a turboprop where the piston engine acts like a combustion chamber. In practice no one uses these any more since the turbines are so much lighter. Some of the last generation turbo-compounded piston engines were pretty impressive machines. https://en.wikipedia.org/wiki/...

      In practice turbo-props are clearly the best solution for all but the smallest planes.

  19. Weight Distribution by Neuronwelder · · Score: 1

    If this thing ever comes to pass. I hope they break up the battery in smaller sizes and distribute them throughout the plane. I can't imagine the horror of a single huge battery hitting something on a crash landing.

  20. Seems reasonable by trawg · · Score: 2

    This sounds great although I'm pretty sure my teleport startup will cut into their margins significantly. We will be offering London to Paris trips that are instant and cost only a few dollars.

    We're just waiting for the technology to get us across the line but we've done a lot of thinking about the business model and we're pretty confident!

    (BBC journalists feel free to call)

  21. Fly AA class? by Latent+Heat · · Score: 1

    Maybe the plane could be powered by distributed AA-size batteries?

    http://www.nbc.com/saturday-ni...

  22. Paris-London is a stupid choice by Misagon · · Score: 1

    There is already an electric train between Paris and London that takes between 2:16 and 3 hours + 30 min checkin time: The Eurostar through the channel tunnel.

    As a rule of thumb, any train journey faster than five hours is faster from city-centre to city-centre than getting on a plane.
    That is because there is so much time overhead before and after the actual plane ride - most of all, the journey to and from the airports.
    The only benefit for taking this plane would be if you would change to another plane at the airport or if your actual destination is not in the city proper but closer to the airport.

    --
    "We mustn't be caught by surprise by our own advancing technology" -- Aldous Huxley
    1. Re:Paris-London is a stupid choice by Anonymous Coward · · Score: 0

      Well, that and flying being significantly cheaper. But I agree, this is one of the silliest routes to start electric flights. It would make much more sense to pick a route where there is no rail alternative.