I was thinking about this [GPH] circuit, and it occurred to me the perhaps it
might be a better approach to go the digital rout to measure the on time for
the injector, rather than design an integrator circuit, scale it and feed it
to a meter? You already have discussed using a 6502 for ignition timing, so
why not add on the fuel monitor task. Analog design can be time consuming,
in that while a design looks great on paper, and the math is correct, there
is usually some fiddling and testing of actual circuit values until you end
up with the desired result. The digital route, I think would be much less
work, in terms of both design and implementation. You could also easily
program both fuel totalizer and real time flow functions, and more.
Your results may vary.
C. Smith

Well it all depends on your programming expertise. I don't think the 6502 is the
way to go any more as it has almost disappeared off the radar :)
However a PIC or a 68xx depending on what you like to program best will
work for that. If you don't have that expertise the learning curve is steep.

As far as the ignition is concerned I have found a guy
at Aero in Germany that is willing to build us a multi-strike unit that
fires the lower plugs 4 or 5 times 1 ms apart at 6000 RPM. I don't think
he is going to use a processor. If he comes through with a unit and
it reduces the BSFC the rotary world will beat a path to his door.

BTW Mario, please call this guy and ask him how it is coming.
His name is Toni Kurpa. +49 02303-257070 He does not do email.
www.federbandschelle.de He is very sharp on CD MSD ignition systems.

I will test it on a dyno and let everybody know if it reduces the
fuel burn or not. If he needs money let me know. All the rotary guys over there
should get together and sponsor this promising project. Mistral, Austro
and SuperTec are also setup to test it for lower fuel burn on their dynos.
High rotary fuel burn is a perception here in the states that must be
addressed if the rotary engine is going to succeed.

This data is good evidence that a such a multi-strike unit will reduce
the fuel burn. So far people have been using piston engine ignition systems
and what is need is a ignition system that is optimized for the rotary's
270 degree expansion cycle. IMHO this should be the highest priority.

Paul Lamar