ORIGINAL: j.duncker
Just to throw a grenade over the parapet.
What would be wrong with fitting a smaller prop. Say a 9x4 then regulating the rpm with the THROTTLE. LESS FUEL TO ACHIEVE THE SAME RPM SHOULD RESULT IN A LOWER HEAT INPUT FROM THE FUEL BURN.
I was told to do this sort of thing by Mr Super Tigre, Senor Garofoli, himself many many moons ago.
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This makes sense with a ringed engine (conventional rings), but does not make sense with an ABX system where the engine is allegedly perfectly fit from the factory as far as piston/liner fit are concerned.
When breaking-in ABX engines, we are concerned with breaking-in the lower end and wrist pin areas, NOT the piston/liner. Yes, I know there are those that will disagree. However, I'm not saying that this is a universal truth. Life isn't like that. The only universal truth is that there are no universal truths.
Ed Cregger