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Originally Posted by cRiPpLe_rOoStEr
When I first heard of solid-oxide fuel cells, they were being tested on ethanol.
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I've sometimes thought that fuel cells running on sugar would be a better solution, as it skips the whole conversion to ethanol step.
Quote:
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Originally Posted by Xist
... if we reduce the lift\drag on a plane at cruise, we drastically reduce the energy needed to propel it.
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Which is why most airplanes have flaps &c, and some have swing wings. They increase lift at the price of creating more drag.