Steve Sampson
Well Known Member
I have never noticed / thought about this before.
As I join the circuit at low power, and push the prop contol forward, the rpm goes typically from 2050 to 2650. At the same time the EGT jump from their typical temps of 1320 to 1340 up to 1450 to 1460, much higher than they would be in normal cruise, or any other phase of flight. The MP naturally drops with the accelerating engine, today to 13".
I dont find it intuitive as to why there is such a sharp EGT rise out of the normal range. Can anyone enlighten me? True it is a very lean mixture at this point, but the engine isnt really working. It is being driven to some extent by the prop.
Its a P-mag carburated roller tappet 160hp o-320 from Superior.
As I join the circuit at low power, and push the prop contol forward, the rpm goes typically from 2050 to 2650. At the same time the EGT jump from their typical temps of 1320 to 1340 up to 1450 to 1460, much higher than they would be in normal cruise, or any other phase of flight. The MP naturally drops with the accelerating engine, today to 13".
I dont find it intuitive as to why there is such a sharp EGT rise out of the normal range. Can anyone enlighten me? True it is a very lean mixture at this point, but the engine isnt really working. It is being driven to some extent by the prop.
Its a P-mag carburated roller tappet 160hp o-320 from Superior.