RE: electric
why do it? why not? its a hobby and hobbies are ment to keep your creativity alive and thriving! now with ther proper setup running a secondary motor off the drive shaft for instance a blet driver turning the motor will indeed create with no problem 6v's. which would relisticly come out to 2/3v's of gain which would be a slight yet noticalbe amount of "boost" if you will.it could also act as a sort of"on board generator" back to the battery extending run time. not by hours of coarse but an extra chunk non the less. again i know it would be easier to upgrade your battery or motor or esc but again like i said just something interesting i was thinking of that would be new and fun.