Re: Hot Bulb Engine

Posted by G Taylor on November 16, 2000 at 17:23:56 from (129.37.161.132):

In Reply to: Hot Bulb Engine posted by Russ Hubert on June 24, 2000 at 18:03:59:

The two stroke model airplane engines that burn castor oil,methyl alchohol and nitromethane mix often use a "glowplug". A version of the hot bulb design. Now many four strokes and recently larger two strokes often use a spark ignition. Initialy heated electricaly red hot,the engine started, warmed leaned out, electricity disconnected and the element stays red hot from combustion heat.
No prize for efficiency but cheap,rugged & reliable. Just don't idle it too slow or the element will cool and engine will stall. Takes a careful balance of element material, mass and wire thickness.Element placement and compression ratio are vital as well.

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