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Old 07-18-2008, 02:54 PM   #9 (permalink)
jamesqf
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Oh, you can do so much better than that. How about a combination of electric and solar/wind power? AE-1 Silent

Launch on the electric motor, then find a thermal and soar as long as you want, using zero fuel. And you can stay up for long periods - I've gone as long as 3 hours or so in a standard air-tow launched sailplane, and could go much longer if there was an on-board restroom :-)
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