Im by no means an expert,
not having even touched an RC helicopter but it may be possible with dual rotors? On for going up and one for going down?
(, Tue 17 Mar 2009, 20:14, Reply)
tis real and with single rotors
they even have competitions google 3d masters
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The sherif of Mottingclam R.I.P Marco, Tue 17 Mar 2009, 20:18,
Reply)
It's all about variable pitch
on the rotor blades. Normally you vary the pitch from very little bite to a lot of bite (which in turn speeds/slows the rotor) down. In a case like this, I suspect the rotors are able to effectively invert the bite, creating negative lift, which considering there is very little weight to the whole 'copter, means it's able to overcome the inadequacies of the aerofoil shape used in an inverted sense as well as gravity.
The tricky part I would imagine other than the timing of not smacking this thing into the ground, is the throttle control as well as the pitch of the blades.
But it is very possible, and very real!
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DavyBoyInGravyJoy Grey Goose Vodka on Ice, nothing finer, Tue 17 Mar 2009, 21:59,
Reply)