RPM / Altitude / Power Equation - for Fixed Pitch Prop

[OpenCirrus619]

All,

Thanks for your input on this.

I was hoping to do one 100% power test run and derive power settings at various altitudes.

The aircraft is a PA18-150 - the POH only gives a figure for 75% (and that is a speed to fly, not RPM).

The slide rule looks interesting - I'm going to have a play with that

Thanks again

OC619