Renewable Energy on Aircraft?

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  • Renewable Energy on Aircraft?


Answer #1 | 16/12 2013 14:01
A wind turbine? As in the giant things that spin in the cornfields? See the problem with energy sources like that is that they just don't generate enough power... The government just puts them up to make themselves feel like they are doing something environmentally friendly. An airplane requires tons of energy to power themselves. Think about it? It just too darn heavy to be lifted by such a small energy source. If they did come up with some idea like that.. it would be too impractical to do anything with... good question though! Maybe one day it can be worked out!
Answer #2 | 16/12 2013 14:11
You know that wind turbine use the wind for power, right? And you also know that, right behind a wind turbine, the wind is affected from having power extracted from it (something we aerodynamicist call "drag") So, you'd like to have an aircraft fly, say at 400 kph, attached to some windmilling propeller that would provide it with energy? And the extra drag from having that large windmill (which, by the way, cannot be 100% efficient in conversion) you plant to overcome how? By burning more fuel? So, you idea is totally illogical, and runs against the laws of nature.
Answer #3 | 16/12 2013 14:06
Perpetual motion is not possible.
Answer #4 | 16/12 2013 14:17
Wind turbines are used on some light aircraft to power electrical systems and large aircraft to provide backup electrical or hydraulic power in case the engines fail. None are capable of sustaining flight because they energy required to run them would exceed the energy produced. However, there is no such thing as a free ride. These installations create drag which required either more fuel to be burned in the engine... or the conversion of potential energy to kinetic energy in the case of an aircraft gliding with no engines.
Answer #5 | 16/12 2013 16:56
No, all that has been though of. there is no need for it with current technology. there is enough surplus power from the engines to drive the starter-generators that produce electricity. What you're suggesting adds more systems, more weight, more complications and more cost.
Answer #6 | 19/12 2013 01:12
In a complete engine failure (all engines), a little wind turbine does actually pop out and produce just enough electricity to keep the essentials going. Remember, you can't get energy for free, those jet engines are engineered to get the most amount of energy for fuel consumption possible, they are already running generators as well as pushing the aircraft through the sky, wind power will add drag in a way that is too inefficient for the jet engines to compensate for, and solar power cant even quite power a whole household, and it's expensive, so to think it can power the entire cabin of an airliner with the relatively small surface area it can cover is dreamable. If reneweable energies were feasable and cost effective at this time, I think they'd be more interested in actually propelling the aircraft than keeping the in flight movies going.
Answer #7 | 16/12 2013 23:29
"For example, would the energy obtained by the turbines be enough to power things like entertainment systems and whatnot?" Possibly, but imagine I was a wind turbine or solar panel dealer coming to your airline and said "can I interest you in a device that will add 5% to the operating cost of every aircraft, on every flight, and is totally unnecessary?" The power required to run things like lights, fans, galleys, lavatories, and entertainment systems is a miniscule amount compared to what the aircraft's multiple AC generators can produce. By adding a complex alternative energy source like solar panels to run those things, you don't save a bit of power from the generators, and you instead incur an additional operating cost to the aircraft.

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