Yes indeed.

Take the pitch of the prop, which will give you the ideal distance a prop will move in one revolution (for example a 13-6 will give you six inches of movement in one revolution).

Take that six inches per revolution at 12,000 RPM means 12,000 X 6 = 72,000 inches in one minute or 4,320,000 inches per hour. A statute mile is 5280 feet or 63,360 inches, well, simple math will use 4.320,000 divided by 63,360 = approximately 68 statute miles per hour. And that's ideal, no slippage. So, that's the MAX the plane will go with that prop rotating at 12,000 RPM. A more realistic speed would be somewhat slower.

CGr.