Engine Roughness/Loss of Power

[DeeCee]

Can't recall that I noticed anything else amiss, although it may have been that I was fixated on the temperature. This was about fifteen years ago.

[Big Pistons Forever]

Originally Posted by DeeCee

Can't recall that I noticed anything else amiss, although it may have been that I was fixated on the temperature. This was about fifteen years ago.

I would suggest that the oil pressure was probably lower then normal reflecting the loss of viscosity of the very hot oil and confirming that it was not an oil temp gauge problem, but reflected a real overheating situation.

I think this scenario is an example of the utility of a static RPM check on the takeoff roll. As soon as the throttle is fully in at the start of the takeoff roll if the engine RPM gauge is showing within the static RPM range then you have some assurance the engine is developing full power. If the carb heat is on most aircraft will not generate full static RPM.

(Note what I am taking about is not the redline on the RPM gauge it is the RPM the engine will show when at full power and the aircraft is stopped or moving slowly. It will always be less then the redline RPM and its value can be found in most POH's)