Being lighter doesn't mean much as per density. A 2x4 floats on water, but I doubt you would want to dive into a pool filled with 2x4's. Ask your pilot friend about fuel consumption on a warm day versus a cold day!
Ceiling fan or blower or both (updated)
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Being lighter doesn't mean much as per density. A 2x4 floats on water, but I doubt you would want to dive into a pool filled with 2x4's. Ask your pilot friend about fuel consumption on a warm day versus a cold day!
That's not a realistic comparison because one is a solid and one is a fluid. Warm air needs higher speed or greater angle of attack to maintain the same amount of lift due to it's lower density.Jim Walsh said:
It's really simple to understand: heat air up and it expands (unless it is contained in a pressure vessel). If the expansion is a doubling of size each cubic foot now holds half the air than before. Therefore the density is decreased by half (along with the potential to make lift).
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