Maybe I misunderstood, but I thought Lynn was recommending
> connecting the mag to the eccentric shaft (prop RPM):
>
> > ... I would rig up a drive for any real aircraft Mag and grind off two of the points cam lobes and spin the Mag at crank speed with a little toothed belt.
> ...
>
> So 8000 crank RPM / 2.85 = 2807 Prop RPM, which should be
> within the capabilities of even an aircraft mag.  ???
>
> Dale R.
> COZY MkIV-R13B #1254
> Ch's 4, 5, 9, 16, & 23 in-progress
>
>

Two firing events per revolution for a two rotor no matter the RPM.

 

In the vent your heads start to hurt just stop reading this.

 

 

My first crank trigger system that worked real well was one reluctor on a disc on the front of the crank pulley. Two pickups 180 degrees apart. Each driving one Chrysler amplifier ($15.00) and each amplifier drivng an Oldsmobile double ended coil, with one wire to each plug on the same housing. So, each system ran two plugs in one housing.

 

Lynn E. Hanover.