A.C., they would surely have to be round ones, otherwise you would get an interrupt in the rotation of the blades as the corners of the flat ones got caught in the power cable.
It may be possible to use tape wire (like you see down the side of a building as a lightning conductor) to avoid the need for a converter to change them.
I believe that it is possible to de-colour them. There is a chap here who makes good money taking the colour out of the diesel he buys in China, so the same principle could be applied.
You see, all it needs is Good Science, and Rotorheads can solve all these technical problems.
