I was surprised at the size of the capacitors
so that added a bit of square inches to the
PC board. Back in the old days (60's) we used
large metal can capacitors that were oil filled
for our CD systems and vac tubes of course.

Those caps store the spark energy instead of
being stored in the coils. CD coils
run cool as they are simply used as pulse
transformers.

Boards cost about 65 cents per square inch
Plus a fixed cost of $55 for tooling.

The caps are the 4 big boxes in the center of the PC
Board. I'll use my favorite heat sink and
TV connector for the output to the coil.
This is for one spark plug on one rotor.
The trailing plug does not need it and
and any back up ignition can be used on the
trailing rotor.

This requires 4 Hall Effect devices
per plug to trigger every 10 degrees for
40 degrees after 22 degrees BTDC.
In other words 20 BTDC, 10 BTDC, TDC and
10 degrees after TDC with no RPM limit
such as MSD's have problems with.
One cap for each spark.

The whole idea here is to see if it will
cut the fuel burn.

I'll see if I can get Mazdatrix to test it on
the dyno. I'll loan it to them for use on
what ever engine they are fooling with at
the moment.

It uses one 400 watt 220 Volt AC off the shelf 12 V power
supply for up to 6 PC boards if you want to implement
that many on a 3 rotor.

Paul Lamar