Need formula for calculating speed for specifi prop

[lensrc]

OK, guru's I know this is well known, but I have never needed to do it before, so how do I calculate the proposed speed from rpms and prop pitch?

[Dick Huang]

lensrc,
Pitch"*RPM*0.00094697=pitch speed in MPH.
for example 10"pitch prop turning at 6000 RPM; Pitch speed=10*6000*0.00094697=56.82 MPH
Dick Huang:)

[lensrc]

Thanks,Dick

[vintage1]

Beware tho, that doesn't tell you how fast your plane will fly.

[lensrc]

Vintage, I'm aware, just wanted to be able to make comparisons with different power systems for a single airplane.