HERING PROPELLER SLIP CALCULATOR PROPELLER PITCH: GEAR RATIO: ENGINE RPM: ACTUAL SPEED (mph): PROPELLER SLIP: % Home  |   About  |   Propellers  |   Guide  |   Accessories  |   Prop Slip  |   Tech Info  |   Contact   Copyright © 2007 - Hering Propellers - All Rights Reserved - Website by OCwebs