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Ed Cregger -> RE: Welcome to Club SAITO ! (7/28/2008 12:33:25 AM)
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quote:
ORIGINAL: Michaelh
In all reality if you just tuned your engine up you shouldnt even know how many turns out it is [:D] Every setup is different .
I have to tune my one plane in at half tank and force it to idle at startup till it starts to lean out then only run it down 5/8ths. The beauty of a regulator is I will not have to worry about this anymore.
Actually, if you treat your engine correctly and do not settle for "just getting away with it", you should check your engine's high speed needle setting before every day's flying session begins, even with a Cline Regulator.
Why?
Because instead of having fixed timing, as you would with a spark plug and ignition unit, your glow engine's timing is affected by ambient temperature, humidity, barometric pressure and probably the phase of the Moon (joking on the latter). The high speed needle is used to not only adjust the fuel mixture to the correct ratio, but also to adjust the timing of your glow engine.
Yes, I know that you'll hear people talking about not having adjusted their engine for two or three years. Those who started out richer than need be will probably not have had any problems, but those pilots that need every last erg of power and who tuned the engine right up to the edge of being too lean are going to experience mysterious deadsticks, backfiring with lost props and a not pleasant sounding engine when the weather changes sufficiently.
I don't mean to offend anyone, but when you hear someone implying that you do not need to adjust that needle valve daily, make a mental note that that person doesn't know squat about glow engines.
Ed Cregger
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