propellor wing screw engine airplane thrust blade prop vane propulsion rotor piston turboprop rudder turbine undercarriage fuselage outboard crankshaft blades nozzle paddlewheel canoe archimedes axle aerofoil winglet rotational ship hub turbofan turbojet propellers sculling gondola irrigation submarine pusher egyptians shaft rotors cylinder turtle camshaft wheel engined radial shafts pedal cylinders powered vertical elevator stationary horizontal engines water brake axles turret fitted tail tractor loading wheeled camshafts loads chassis hydraulic overhead clutch valve rails throttle rear load configuration rudders bogies helical handlebars towing locomotive helix colliding propellant steering unpowered compartment spinning valves tremolo crank reciprocating brakes pulley ramp hydraulically starboard piloting