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Old 12-12-2002 | 05:28 PM
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David Cutler
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Default Is using less pitch on a prop reduces torque?
Originally posted by lnorris


David C., btw, according to my old physics books and the conservation of energy, the weight would be the same.
OK then, if the truck had a flat bed (i.e. wasn' enclosed) wouldn't it be lighter by the weight of the helicopter, if it took off?

The question is, at what stage in the 'openness' of the truck body does the weight of the helicopter not any more impart it's weight on the truck?

Or, to put it another way, if the hovering helicopter is still weighing down the truck with the enclosed body (as you suggested), is it the movement of the air that is doing it, as there is no other contact with the truck if its hovering.

Its a bit like standing in a bucket and lifting yourself off the ground with the handle!

David C.
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