Rpm and top speed loss after changing reeds?

[Destroyer]

Originally Posted by jvitiel

Interesting. I never considered the cup. Thanks for the insight!

There's a lot of things that determine prop slip. Pitch, Cupping, Rake, Material, Diameter, Number of blades, Leading edge, Trailing edge, Blade tip, Blade root just to name a few.

A good quick way to determine what is your prop slip is to use this calculator from Mercury Racing. While it may not be accurate for a racing enthusiast, it's more than sufficient for the average Joe.

http://www.mercuryracing.com/prop-slip-calculator/