BALLAST
Ballast weight mounted on the aircraft to maintain the center of gravity in the permitted range.
BALL NUT
NUT with balls sliding spherical nut that moves by the rotation of the lifting screw to move the flaps and stabilizer.
BAR OUT OF VIEW
PLANK out of sight, the signal is used to remove the command trims flight director.
BAROMETRIC PRESSURE
Barometric pressure, air pressure above zero, measured in inches of mercury (Hg) or in millibars (mV).
BASE METAL
Parent metal under the metal coating in which the added chemicals or other metals.
BATTERY
BATTERY (galvanic cell), an electrical device to convert stored chemical energy into direct current.
BATTERY BUS
BATTERY BUS, an electrical conductor, which is supplied with a constant electric current from a battery or a transformer-rectifier for supplying electric power to the operating elements.
BATTERY CHARGER
Battery charger, electrical device, to which an alternating current is applied, and which produces the output direct current to charge the battery on the plane.
BAY
Niche compartments, the design of the aircraft.