>Your suggestion seems to give a little bit of ignition advance. I was
>hoping that someone had either heard of a reasonable ballpark amount of
>advance for a model engine or had done it themselves. I will be the
>person flicking the prop here and IIRC too much advance can lead to a
>nasty bite!

Hehehe. I think it's called the RC finger (red, swollen index on right
hand).

When you tinker with this you do not want the engine to start so dry the
carb out and use a pipette to put just a small amount of fuel (3-4 drops)
on the exhaust ports and work it into the engine with the ignition off,
then make a start attempt. Repeat. High compression 2-stroke engines MUST
move the ignition point to negative advance at start because they will
start backwards otherwise.  (negative a. is beyond TDC in the direction of
moving). Also beyond and not at because at TDC the detonation will produce
no torque and can dent the crank pin (remember the speed is zero and the
crank lever is inline with the piston). If you do this right the engine
will start with the first flick of the prop (unlike normal glowplugs).

Peter

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