Different crankcase

[circeonya@hotmail.com]

I think most light aircraft have a magneto, indeed two which the pilot has to ascertain that both are capable of working before takeoff. Going from the experience of my father's 1926 Armstrong Siddley a big problem was sustaining the magnetism in the iron magnet. He would regulary remove it from the car and wind some wire around and give it a few zaps with a 12v battery. Modern day magnets have umpteen times more strength and don' loose it.