Anyone know the RPM range of a Magnum 45 Pro?

I am thinking it is in the range of 12-13,000 rpm, comparable size OS engines spec as high as 16-17,000 rpm.

Any help is appreciated.

Steve

The rpm numbers that're published with engines are just numbers. Ignore them.

The recommended propellers, on the other hand, are worth considering. It's the appropriate prop you want to find, not a magic rpm. And there will be a number of candidates that might work for your engine on whatever it's bolted to.

You don't mention what airplane. That'd be important to know in order to suggest a prop. That is what this is all about, isn't it?

Ignor the rpm unless your aiming for pylon racing, in general try a few props and see what works best.