Thanks to all about the tach, etc. I never used a tach in the past, and now is a good time to get one. Question: If the engine tachs 11000 on a 11 X 7.5, on the ground, then airborne, it unloads to 12000, can I put on a 11 X 9 or 11 X 10, get maybe 1500 RPM less, but have more torque ? Is RPM's necessarily the answer, if the long stroke SF's can do the job at less RPM ? I see the term, "Pattern Props", for the 11X10, and other sizes like this. Where are these props being used ?

Hope I am making sense. I have many TF 11 X 7.75 and 11 X 7.50 Super M Power Props.

Thanks,

Vince