1) Aircraft propulsion component 2) Airplane propeller 3) An airplane propeller 4) Plane propeller 5) Prop 6) Propeller 7) Propellor 8) Spitfire propeller 
aircraft propeller
All. types of screws with helical blades designed to rotate in air and more particularly power-driven screws designed to produce thrust by rotation. Synonymous with the term 'propeller'. Airscrew slip is the ratio of the actual advance per revolution of an airscrew to the theoretical r advance per revolution. Airscrew efficiency is an expression of...
an airplane propeller.