As the rotor is now driven and rotated, it is even tolerably matter. Whether combustion or electric engine, the most important for him is that he turns and moves.
Benefits RC Helicopter With Electric Motor
Now electric motors have significant advantages but also and especially in RC helicopters: they are reliable and do not bother with stench still excessive noise.
And they are available in such a tiny figure that RC helicopter electric this year are become so small that they can be flown to the Sunday lunch in the parlor. Try doing that with an internal combustion engine and the dear mother would very blame us!