Propeller A device for propelling an aeroplane by its action on the air, comprising two or more blades on an engine-driven shaft producing thrust. Discover more from Canadian Flight Trainers Subscribe to get the latest posts sent to your email. Subscribe Related Articles: Float Rating – Part 2Seaplane Rating | How to Land a Float PlaneTurboprop EngineGlossary: Brake Horsepower (BHP)Glossary: Feathered Propeller