Chris,

Generally there is a 'saturated current level' for ignition coils.

The electronics will let the coil ramp up to a given current, then hold that current level. At low rpm there is a longer dwell (coil turned on) compared to higher rpms (less on time).  Since no one else has reported the issue I'm thinking there maybe a wiring or back feed problem.  It is simple to look at with a "clamp on current probe" attached to oscilloscope, but not a common tool for most folks to have available.   If you know of any automotive techs around the hanger, just ask and if someone has one they will most likely speak up!

Tom

(digest mode, so I'm a day late on the replies... )

--- On Tue, 7/1/08, Rotary motors in aircraft <flyrotary@lancaironline.net> wrote:

 1) Saga progress
    by "Christopher Barber" CBarber@TexasAttorney.net 

 

Ok, here is the problem though.  A question for the more electrically savvy.  When I get the engine to a low/very low idle I am tripping the coil circuit breaker.  It does not seem to be a problem at mid idle to high RPM. It has been consistent.  I don't even know where to start. Thoughts please.