Chassis (Carriage)—The part on which the main body of an aëroplane or model aëroplane is supported on land or water.
Chord—The distance between the entering and trailing edges of a wing.
D
Deck—The main surface of a biplane or multiplane.
Directional Control—The ability to determine the direction of the flight of an aëroplane.
Dirigible—A balloon driven by power.
Dope—A coating for wings.
Down Wind—With the wind.
Drift—The resistance of the wing to the forward movement.
Dihedral Angle—The inclination of the wings to each other usually bent up from the center in the form of a flat V.