When lyco and >cont made engines magnetos were very unreliable so they put 2 on incase one >failed. With 2 magnetos you have to have two wiring harnesses and two spark >plugs. >David Mikesell ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Some of the early low horsepower, smaller cube aircraft engines only used one mag. When the bore of the engines increased above a certian size they needed a second mag and plug to get an efficent fuel burn on the power stroke. The flame just would not span that volume effectivly. That's the reason you get the rpm drop during mag checks. That's also the reason you run with both mags "on" and don't just save one in case of failure. The unused plugs may also foul over but let's not even go there. The old farm tractors ran on just one mag. Perhaps if they had used dual mags they might have gotten their crops in faster. :-) This could be an endless debate. I suspect that if you did a + / - column for each system you will end up with a flyable C.G. with either system. I was able to fix my wing tank leak (it appears) without having to cut any wing skins. I opened the 48" rib at the base, fixed the leak, and closed it back up. It cured while I watched the local University's BB team put another notch in the W column. They beat the team picked preseason as #1. They are now 10/2 and the KR should be flying again in a week or so.Yeee Haaa, let the good time roll !! Larry Flesner Carterville, Illinois
