RCU Forums - View Single Post - Midrange issue

12-21-2010 | 12:40 AM

#34

DarZeelon

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From: Rosh-HaAyin, ISRAEL

RE: Midrange issue - glow plug?

Quote:

ORIGINAL: Cpt Crash

...I've got an OS #8 standing by for the warmer weather.

Crash,

Your engine has a 1.20 cid displacement!

Virtually all medium-heat glow-plugs are too hot for an engine of this size.
The engine needs a cold glow-plug.

Also, the OS #8 is too short for this engine (and also for mid-large OS engines...) and is recessed in the chamber.

Some good cold glow-plugs are the Rossi R5/R6, the Enya #5/#6, but there are many others.

Using a plug which is too hot for an engine, requires that you retard the ignition by running a richer than necessary mixture setting (the needle is your ignition timing control).
This curtails your flight time and unnecessarily wastes your fuel.

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