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fderfler(at)gmail.com
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 Posted: Sun Dec 09, 2007 5:35 pm Post subject: Alternative Power Systems for GA? |
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I don't want to start an(other) "off-topic" thread, so you can reply directly if you wish, but has anyone seen a good discussion of "other than internal combustion" power for GA aircraft?
My reason for asking is this quote: "Honda claims that their current V-flow fuel cell stack, 100 kW electric motor and Li-Ion battery weigh the same or less than a conventional hybrid powertrain producing less power."
THIS ARTICLE is talking about alternative sources of automotive power, but they are working at about 130HP. If you know of any aviation discussion threads on fuel cell or hybrid power for GA acft, please let me know.
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Frank Derfler
-- Daily Discussions of All the Guy Toys that aren't (clearly) illegal or (blatantly) immoral at my Blog http://MOSTLYFLYING.blogspot.com
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Frank Derfler
-- Daily Discussions of All the Guy Toys that aren't (clearly) illegal or (blatantly) immoral at my Blog http://MOSTLYFLYING.blogspot.com
- Pilots learn about flights to great places at www.FLYINFLORIDA.COM
-Boaters get the Best Information on Cruising the Florida Keys at www.KEYSBOATER.com
-For the Best Gifts for Guys see my www.GREATGUYBOOKS.com [quote][b]
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Gig Giacona
Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA
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| Posted: Mon Dec 10, 2007 8:07 am Post subject: Re: Alternative Power Systems for GA? |
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The technology for a usable electric power system for a light sport aircraft isn't even close yet. And before somebody yells look at what Sonex is doing I will again say The technology for a usable electric power system for a light sport aircraft isn't even close yet.
Battery technology just doesn't have the power density yet. When there are batteries that weigh the same as 24 gallons of gasoline and can power an aircraft with the equivalent of 100HP for 4-5 hours then we can talk.
| fderfler(at)gmail.com wrote: | I don't want to start an(other) "off-topic" thread, so you can reply directly if you wish, but has anyone seen a good discussion of "other than internal combustion" power for GA aircraft?
My reason for asking is this quote: "Honda claims that their current V-flow fuel cell stack, 100 kW electric motor and Li-Ion battery weigh the same or less than a conventional hybrid powertrain producing less power."
THIS ARTICLE is talking about alternative sources of automotive power, but they are working at about 130HP. If you know of any aviation discussion threads on fuel cell or hybrid power for GA acft, please let me know.
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bryanmmartin
Joined: 10 Jan 2006
Posts: 1018
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| Posted: Mon Dec 10, 2007 3:48 pm Post subject: Alternative Power Systems for GA? |
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Even in cars, hybrid systems are all but useless for long cross
country trips. All of the economy advantage for hybrid systems is
achieved in city driving because kinetic energy is reclaimed by
running the electric motor as a generator to recharge the battery
while slowing down in city traffic instead of wasting it as heat in
the brakes. They actually get better economy in the city than on the
highway. I can't see a hybrid system being of much use in an airplane.
One major problem with a battery driven system is that all of the
energy must be carried in the battery. With a fuel burning engine,
only the fuel must be carried, the oxidizer is pulled out of the air
as needed. The air makes up more than 9/10ths of the mass needed to
get power from the engine.
On Dec 10, 2007, at 11:07 AM, Gig Giacona wrote:
| Quote: |
>
The technology for a usable electric power system for a light sport
aircraft isn't even close yet. And before somebody yells look at
what Sonex is doing I will again say The technology for a usable
electric power system for a light sport aircraft isn't even close yet.
Battery technology just doesn't have the power density yet. When
there are batteries that weigh the same as 24 gallons of gasoline
and can power an aircraft with the equivalent of 100HP for 4-5 hours
then we can talk.
fderfler(at)gmail.com wrote:
> I don't want to start an(other) "off-topic" thread, so you can
> reply directly if you wish, but has anyone seen a good discussion
> of "other than internal combustion" power for GA aircraft?
>
> My reason for asking is this quote: "Honda claims that their
> current V-flow fuel cell stack, 100 kW electric motor and Li-Ion
> battery weigh the same or less than a conventional hybrid
> powertrain producing less power."
> THIS ARTICLE (http://www.vtec.net/articles/view-article?article_id=724661
> ) is talking about alternative sources of automotive power, but
> they are working at about 130HP. If you know of any aviation
> discussion threads on fuel cell or hybrid power for GA acft, please
> let me know.
> --
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Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive. |
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