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Old Oct 22, 2011, 04:28 AM
Complete RC Idiot Savant
The Netherlands
Joined Nov 2009
2,617 Posts
Discussion
Glow engine, spark ignition

Hello all,

Just wondering: has anyone experience with a methanol fueled, spark ignited fourstroke in a (scale) helicopter? Just asking since yesterday I built in a RCELX ignition in my OS FS 91 powered Vario Bell 47 G, and I am all new to electronic ignited "glow" engines, and I am thinking that using one of those in a helicopter is not quite the same as running one in a plane with regard to constant RPM/varying load and especially cooling conditions.

Brgds, Bert
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Old Oct 22, 2011, 04:54 PM
Complete RC Idiot Savant
The Netherlands
Joined Nov 2009
2,617 Posts
Well, it seems that I overlooked the fact that a helicopter is built slightly different from a plane, which might have caused some additional problems:

Engine is (as in most helis) fairly close to the rotormast, so the swash servos are fairly close to the sparkplug lead. This seemed to give interference, which I hope to couter with ferrite rings in all the servo-leads....

Did almost cost me the helicopter though, because with a rangecheck (engine on idle) all seemed OK, but after taking off and hoovering, within 20 secs the fail safe kicked in, and that was a hairy moment.

The short time I could fly the chopper, it seemed that the engine is more powerful and it also seems to run a lot cooler on unchanged needle settings.

To be continued....

Brgds, Bert
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Old Oct 23, 2012, 12:41 PM
Complete RC Idiot Savant
The Netherlands
Joined Nov 2009
2,617 Posts
never mind, problem solved

Brgds, Bert
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Last edited by Brutus1967; Oct 24, 2012 at 11:51 PM. Reason: Problem solved
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