Royce Wise wrote:

Paul, Tracy, Ed, anyone.
How does the rotary ignition timing compare to a piston engine?
Does it fire like a 3  cylinder, 4 cylinder, 6 , or 8, or none of the above.
Royce

Once per rev for a one rotor and twice per rev for a two rotor
180 degrees apart. It is quite practical to do away with the
crank angle sensor and trigger off the flywheel.
No shafts or bevel gears required. With a four cycle piston engine
you need to know what stroke it is on (compression or exhaust).
You need to look at the 1/2 speed camshaft to figure it out.

Tracy fires both plugs at the same time and 22 BTDC as I recall. 
The Stock Mazda computer fires them at different times to minimize
emissions.

Paul Lamar
 
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