Topend Free

The premiere marine propeller calculation application for your android device. Input your boat and propeller specs to gauge your estimated top speed, propeller slip, rpm, gear ratio, propeller pitch, and hull drag. Put it to the test by running a sea trial/trial run and collecting your speed information, distance, and time. Save your trial runs and review statistics at any time. A must have for any power boat enthusiast.

**PRO version is available with all features unlocked and no ads.**

Current version tested on Droid1, Droid2, DroidX, and Thunderbolt.

Features include:

- Calculate up to 6 variables with basic and advanced mode
- GPS trial run tracking and stat collection (Available in Pro version)

keywords: marine, boat, power boat, race, racing, ship, offshore, propeller, prop, calculator, top speed, max, mph, pitch, rpm, slip, gear ratio, sea trial, test run, trial run, hull drag.

Tags: propeller calculator, propeller slip, propeller calculation, android drag racing gear ratio calculator, drag racing gear ratio calculator.