I believe when the trailing plug fires a waste spark would then reach

the

 > compressing intake charge on the other rotor.
 >
 > Mike McGee, RV-4 N996RV, O320-E2G, Hillsboro, OR
 > 13B in gestation mode

We have a winner!!!!!!

While there are several systems for lighting the fire in the leading

plugs,

the trailing system must be distributed (with the monkey motion

distributor)

or electronically. However at near full throttle operation, there is

little

power lost firing both the leading and trailing plug in the same housing
(read that again) at the same time. It takes only two double output

coils to

do it instead of three or four in other systems. It can be done with a

single

reluctor on the crank and two pickups, 180 degrees apart. No advance

system

is required. The crank trigger on a large diameter disc is the most

accurate

method for timing.
Lynn E. Hanover

Simple and elegant but no cigar for aircraft applications.  Using this setup
you loose all power from one rotor in the event of a coil failure.
I'll put up with one more coil for the advantage of redundant ignition.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

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