Propeller Shaft—A piece of wire which is run through the hub of the propeller and tubing in mounting the propeller.
Pylon—Correctly, a structure housing a falling weight used for starting an aëroplane, commonly a turning point in aëroplane flights.
Pusher—An aëroplane with the propeller or propellers situated in back of the main supporting surfaces.
Q
Quadruplane—An aëroplane with four wings superposed.
R
Rudder—A plane or group of planes used to steer an aëroplane.
Runner—Strip beneath an aëroplane used for a skid.
Running Gear or Landing Gear—That portion of the chassis consisting of the axle, wheels and shock absorber.
Rib—Curved brace fastened to the entering and trailing edges of a wing.