hmmm I think the most feasable is counter rotating props; but then again its no longer a DF anymore, you can ditch the 4 electric motors ;-)

How could this bea complished-
2 seperate glow motors with different speed for the same throttle- simple to correct for in electronics. Probbable most feasable idea i think. Coaxial bearings and shaft setups for counter rotation are pretty simple (haha ish). Not sure about the power to weight ratio for 2 small glow engines- whether its worth ur effort.

Oh well- keep dreaming anyways

oh for generators, check out sullivan products or something like that. They make generators for UAVs. 800mA @ 4.8v for $100. Thats not gunna power @#$@# but then if uve got 2 counter rotating props u only need real small electric props for drive, and to power the lectronics. Anyway at this stage its not gunna resemble a draganflyer anymore anyways
Sweet