ORIGINAL: av8tor1977
Addendum, a glow engine that drops rpms with the glow power off usually needs either a hotter plug, or more nitro, (or more compression).
I would second that. With old beaten up glow plug I got drop rpm by about 500 when cutting off the power. However with the new OS plug the engine run smooth without battery connected.
I would like to see if I can get a better power with some nitro added. Is it safe? How much? How nitro would act on the ignition timing?
RysiuM