Diagram of AutoProp in use

In forward the propellor rotates to the correct pitch automatically. This results in increased propulsion efficiency which reduces fuel consumption, and extends cruising range.

While under sail the propellor feathers itself to reduce drag by 85% compared to conventional 3-blade propellors.

The Autoprop also self pitches in reverse to give you the same thrust in reverse as you would get in forward. This greatly improves stopping power, backing down, and overall maneuverability.