Captive.—A balloon restrained from free flight by means of a cable attaching it to the earth.
Kite.—An elongated form of captive balloon, fitted with tail appendages to keep it headed into the wind, and deriving increased lift due to its axis being inclined to the wind.
Pilot.—A small spherical balloon sent up to show the direction of the wind.
Sounding.—A small spherical balloon sent aloft without passengers but with registering meteorological instruments.
Balloon bed: A mooring place on the ground for a captive balloon.
Balloon cloth: The cloth, usually cotton, of which balloon fabrics are made.
Balloon fabric: The finished material, usually rubberized, of which balloon envelopes are made.
Bank: To incline an airplane laterally—i.e., to roll it about the longitudinal axis. Right bank is to incline the airplane with the right wing down. Also used as a noun to describe the position of an airplane when its lateral axis is inclined to the horizontal.
Bank, angle of: The angle through which an aircraft must be rotated about its longitudinal axis in order to bring its lateral axis into the horizontal plane.
Barograph: An instrument used to record variations in barometric pressure. In aeronautics the charts on which the records are made indicate altitudes directly instead of barometric pressures.