I think that a correctly designed quad could, but it'd need bigger props than are common on quads.
I'm kinda guessing here, but I think you'd need roughly the same disk area on the quad as on a similar-weight helicopter that could autorotate
-- and it'd need variable-pitch props that could go to negative pitch before they slowed down, and probably purpose-written software in the fly- by-wire system.
There'd be oodles more stuff that could kill you with a malfunction than with a Heli, basically.
-- Tim Wescott Wescott Design Services http://www.wescottdesign.com I'm looking for work -- see my website!
Autorotation requires a rotor with variable pitch and a lot of inertia in the blades. You have to be able to invert the pitch in order for the slipstream to keep the rotor turning, then invert it again before you hit the ground.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
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