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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › OS 55 HZ Engine Correct operating temperature
12-01-2017 08:50 PM  12 months agoPost 1
Gary Steward


Senath, Missouri

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I used to know this but I’ve been out of the hobby for awhile. I like to use an Eagletree motor temp setup especially during break-in because I don’t have a good ear about how the motor is running during flight until it’s too late

Gary Steward

12-01-2017 09:39 PM  12 months agoPost 2

rrKey Veteran

Morgan Hill, CA. USA

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Since there is no standard location on our motors to measure temperature, no one publishes that type of data.

You may have your favorite spot, but it may be different from mine.

I used to run a Spektrum TM1000 with the temperature probe wrapped around the cylinder just under the header.
Then I read an old article that stated the guys running control-line speed (using .35 & .45 engines) for their record setting speed runs measured the temperature at the base of the glowplug and tuned for peak temperature.
When I moved the TM1000 sensor to the top, the temperature went up by 50*F.

The CSM "CarbSmart" uses a thermally conductive 2-part epoxy to bond their sensor to the fin closest to the glowplug and stated that was the most sensitive and accurate location
The CarbSmart adjusts the mixture base on the temperature changes from the sensor and is supposed to save fuel and protect the engine from lean conditions.
Mine never worked too well.

I get what you are asking.
But I don't have an answer for you.

The good news is most motors don't require "break in" anymore.
Personally, I will set the needles to the factory recommended settings and add 1/4 turn. Then fly it and lean it a maximum of 3 clicks before flying it again.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

12-02-2017 12:25 AM  12 months agoPost 3


Brandon MS

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I've never had much luck temping heli engines they are not like a RC car you can get to the glow plug easily plus I like to run helis a little fat maybe a click or two on the high side. Like stated very little break-in is required on the new ringed engines.

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12-02-2017 01:36 AM  12 months agoPost 4

rrElite Veteran

Ottawa, Ontario

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The old school method is putting your finger on the back plate. If you can keep it there for 10 seconds your fine.

spending time, paying attention

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