<< Has anyone did a straight and level and switched off the trailing ignition.
 > What was the rpm loss and speed? I'd like to know on take off as well, but
I
 > wouldn't ask anyone to do that! Anyhow I have an idea. Thanks Skip

I can tell you about the result on a similar engine (12A). If the trailing
system fails I would estimate a 5% power loss. Engine runs fine, and sounds
fine. If the leading system fails, I would estimate a 10% loss of power.
Engine runs fine but sounds just a bit flat. I would expect EGTs to go up
very slightly. Should a failure occur that shuts down both plugs in one
housing, the engine will last only a few seconds at full power.
The shaking will fail rotor gear teeth or stationary gear teeth.
Is that what you wanted to know?

Lynn E. Hanover

 
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