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High Temps Under Reduced Power Settings

by Greg Tabe in 912 / 914 Technical Questions 5 years ago

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Re: High Temps Under Reduced Power Settings

by Greg Tabe » 5 years ago

Greg Tabe

1 5 2

Engine/propeller is in the tractor configuration.

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Re: High Temps Under Reduced Power Settings

by Bill Hertzel » 5 years ago

Bill Hertzel

13 1.95k 7.96k

Looking back at your first post...

...EGT increase(s) rapidly when the throttle is reduced for descent and entry into the circuit...

You may be on to something there!!!
Backing off the throttle and reducing power should lower the EGT almost instantly followed by the CHT slowly reducing.

A cooling issue would be a slower response due to the thermal mass of the engine.
The increase in EGT means the exhaust gasses are now hotter.

Watch closely the next time this happens.
What happens first?
Does the EGT rise quickly followed by the CHT?
Or does the CHT lead the EGT?

Which heat source is in control?

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

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