Ok, Things are coming together now. Let me make an example and see if I am right.
Magneto and source coil are fixed timing,
If the source coil could be moved from left to right, this would mean adjustable timing.
So now that the timing makes sense, the difference is that the Electronic advance is the little sensor and pickup with little wire like one on the DA engine and the Mechanical is the White round thing like on a Brison.
An EI is more like the stationary Magneto and source coil, just on a smaller scale and the Mechanical actually moves with the throttle to a certain point to "Advance" the timing as the engine revs up and lowers the timing to compensate for the lowering of the rpms.
I hope this is correct because I feel good about it
Thanks a whole bunch!!!
Dang, just thought of something, On my airplane, I have to utilize the carburator rotate block so the throttle connection is on the bottom of the carb, by utilizing the mechanical advance, can this still be done or do I have to redesign the throttle servo hookup?
Jeff