Hi guys Thanks for the help with finding a toggle switch, it looks like I will be able to get what I am looking for albeit at a price. I was asked what I need it for and somebody suggested using a Cessna mag switch. I need it for a plane I am building with a revmaster motor on it. I have fitted it with a homebrew dual, totally redundant electronic ignition system and I want to use the switch to switch between the two systems without passing through an "off" position. The motor will run on both systems under normal conditions but I need to be able to isolate one at a time to do in-flight checks. I could easily use two standard single pole, single throw on/off toggle switches but there is always the possibility of confusion. A Cessna mag switch will not work because for a mag "on" is actually an open contact where I need a closed contact for "on" I have considered a rotary switch but I dislike them and would rather put some effort into finding a toggle switch that will do what I need it to do. My thinking was to supply power to the "special order" toggle switch via a normal DPST toggle switch which will supply each system's power from its own battery and use the "special order" switch do select which ignition I would like to use/isolate. That way, once I have switched on the ignition power switch, no matter what I do with the selector switch there is no chance of inadvertently switching the motor off. I will put a guard over the power switch..
Regards Dene Collett Avlec Projects cc Port Elizabeth South Africa
