Quote:
Originally Posted by VintageRacer
Why indeed.
Impressed with their helicopter flying skills. Still don't understand how a helicopter can fly upside-down.
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'3D' helicoptors dont vary the speed of the rotor to control how much lift they get, it runs at a constant rpm and they vary the angle of the baldes
so, they can turn the angle of the blades to a negative angle and reverse the thrust that the rotor gives.... very clever!