5. Stream-line Body.—The shape of a body or part which permits a regular flow of air around and along it with the least resistance, in other words with minimum, obstruction and eddying.
6. Fairing.—Building up a member or part of the plane with a false piece that it may have a stream-line body.
7. Wings, Planes, Panels.—The main supporting surfaces of an airplane are called wings, although the terms planes and panels are probably as frequently used and even preferred by many. The term panel refers properly to a section of the wings with the included struts and wires. The small panel directly above the body is called the engine section panel or the center panel, while the panels to the right and left of the body or fuselage are called the main panels. The main panels are the right and left panels as seen from the seat. Each main panel may be subdivided into the inner wing bay, the outer wing bay, and the overhang.
8. Landing Gear, Chassis or Undercarriage.—The wheels and the struts and wires by which they are attached to the fuselage.
9. Horizontal Stabilizer or Horizontal Fin.—The horizontal fixed tail plane.
10. Vertical Stabilizer or Vertical Fin.—The small vertical fixed plane in front of the rudder.
11. Rudder.—The hinged surface used to control the direction of the aircraft in the horizontal plane. As with a boat, for steering or “yawing” or changing its direction of travel.
12. Elevator or Flap; Flippers.—A hinged horizontal surface for controlling the airplane up and down, usually attached to the fixed tail plane; for pitching the machine or “nosing up” and “nosing down.”
13. Tail or “Empennages.”—A general name sometimes applied to the tail surfaces of a machine.
14. Mast or Cabane.—The small vertical strut on top of the upper plane used for bracing the overhang.