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Hi All,
Giff Marr wrote:
If my memory serves me, I believe that the Northstar engine has coils that
serve two cylinders. Would this be a better weight solution then installing
4 [13B] or 6 [20B] coils.
This could be a genuinely bad idea. All such coils that I'm familiar with operate on a "waste spark" principle - i.e. the "ground" for both ends of the high voltage path is at the plug in each of the served cylinders. The pairing is such that one cylinder is at the top of the compression stroke and the other is at the top of the exhaust stroke. The only comparable condition in a rotary engine is with simultaneous firing of both plugs on the same rotor. Such an arrangement would considerably diminish the safety redundacy of the ignition system - in that if a coil fails, one completely loses the power on that rotor.
Moreover, if one plug goes bad, it can diminish the quality of the spark in of the other plug on that coil - which also could have the effect result of no power from that rotor.
my $.02
Dale R.
COZY MkIV-R #1254
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