BTW, see the prop on the Decathlon?

It's a 12x5, right? Well, it started life as a 13x5. But when I swapped the OS55AX into that airplane in place of the OS46AX, the engine acted like it needed a bit more blade area to work a 5"pitch and not run too cool. So I made that 12x5 out of a 13x5 and the engine seemed to run smoother. And the airplane benefitted from the lesser pitch on the approach. So with that prop it gets the lesser pitch and the engine gets a slightly better resistance to work against. So it runs warm enough now throught it's envelope. And with the baffle, it was running too cool. hmmmmmmmmmm Should I have pulled the baffle? [sm=wink_smile.gif]