Stability in the line of travel, or with the relative wind, so that the machine always tends to head into the wind.
A speed type biplane in which the body entirely fills the gap between the upper and lower wings.
A testing device in which a model wing or body is placed at the end of a revolving arm.
The main supporting surfaces of an aeroplane.
The face of a propeller blade lying next to the slip stream.
Due to skin friction and eddies, a moving aircraft drags a certain amount of the surrounding air with it. This reduces the effective resistance of the hull and increases the effective pitch of a pusher propeller since the latter acts on a forward moving mass of air. This is "Wake gain."
Launching with Catapult from Deck of Battleship
