Two, Three, Four, Five, and Six Blade Ultra-Prop Composite Propellers for Ultralight Aircraft and Air-Drives Since 1983


Propeller Protractor

NEW! Our Digital Propeller Protractor is now available. A low cost, accurate, and easy to use digital propeller protractor to check, set, or change propeller pitch.

Introducing Ultra-Prop II

We are now shipping the Ultra-Prop II with a newly designed blade having optimum twist and fabricated with a new engineering thermoplastic resin with carbon fiber reinforcement.

Airboat Propellers

Small airboats are just plain lots of fun! The Ultra-Prop is a popular choice with bow fishing and Flounder enthusiasts. It’s also tough and impervious to water, and therefore ideal for this application.



The Ultra-Prop: Ultimate Props for Ultralights, Trikes, PPG’s, Gyrocopters, Air-Drives, Airboats, and Hovercraft

Competition Aircraft is the home of the Ultra-Prop I and II, high performance composite propellers designed for use on ultralight aircraft including ultralight trikesgyrocopters, and powered parachutes. The Ultra-Prop is also compatible with airboatshovercraft, and air-drives for Flounder gigging and bow fishing. 

The Ultra-Prop Propellers and propeller components we feature are manufactured for easy assembly and long life. Choose from 2, 3, 4, 5 and 6 blade propellers and select the ideal pitch and optimum diameter to suit your craft (up to 66" on 2, 3, and 4 blade propellers, 67" on 5-blade propellers, and 67 1/2" on 6-blade propellers). You will hear and feel the remarkable difference an Ultra-Prop makes on your first run-up.

  • Lowest cost adjustable pitch prop in the world - 36 years in production — over 18,000 sold — satisfaction guaranteed!

  • Unique pitch block system holds blades at exact angle — no protractor required.

  • All Ultra-Prop blades are identical and interchangeable — featuring perfect balance and exceptionally smooth performance with tough, glass or carbon reinforced nylon or PPA thermoplastic making them ideal for water or rough field operation.

  • Prices start at a low $300 for a 2-blade Ultra-Prop I standard kit.

  • New spinner kit including mounting bracket and hardware for Ultra-Prop and Brolga tractor and pusher applications (not available for 5 and 6 blade propellers).

  • Check out our Propeller Recommendations for recommended Ultra-Prop combinations.

  • Assembly Instructions: Download in PDF format.

Last autumn, I purchased the 66-inch 3-blade Ultra-Prop II from Competition Aircraft. I remember my delight on that first flight with the new propeller… how smooth it was, and much more noticeable thrust! I’ve now flown 30 hours with the Ultra-Prop II and I continue to have the feeling that I’m flying a new airplane.
— Clair Pecinovsky, Cresco, Iowa