[gambiting]

Unless of course the power supply fails, in which case we're back to the point I brought up earlier - you have neither autorotation nor gliding to fall back on, the vehicle just falls out of the sky like a brick - the parachute would help but I'm not sure how feasible that is.

[fiter]

Which power supply? According to the poster there are 9 separate battery packs which, presumably, are the power supplies.