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Bought a helicopter and the rear blade didnt turn at all, thing crashed, the f@@k in the shop said it had crashed therefore sod off.! i said the whole body was spinning because the rear rotor stops it when it works properly. he wouldnt have it, so i put it on the floor, calmly, and stamped on it with my boot and said keep it then. was i right about the rotor balde at the rear? he reckons it still shouldnt have crashed. u ever tried to control a helicoptere at the best of times!?! thamks for the answers . apart from the name of leftovers. if u read the question right u fool . ul see that i didnt lose my temper. r u thick? i mock u foolish imbecile

It does not require 2 lift rotors in opposite directions or a tail rotor. it requires equal rotational torque. to this end most helicopters have an engine that is fixed to the main tub which then transfers torque (turning the lift rotors) so the tub will want to turn one way and the lift rotors the other. to balance this the tail rotor adds torque in the direction of the lift rotors. the reaction from the tail rotor it taken up by the lift from the lift rotors. hence blades turn tub stays still (when correctly balanced).this situation only happens when the power source transfers torque if you mounted the power source on the blades themselves then you would not have a reactive force (centripetal / centrifugal negated for lift) and no need for a tail rotor only some form of stabilisation fin. look up blade mounted gas engined helicopters.