variable-pitch propeller

non-uniform pitch propeller

adjustable-pitch propeller

effective pitch of propeller

geometric(al) pitch of propeller

controllable-pitch propeller

fixed-pitch propeller

continuously variable slope delta (CVSD)

variable

variable housing allowance (VHA)

variable-time fuse / VT fuse (VT, also fuze)

variable time (VT)

variable operating and safety level

variable safety level

constant-horsepower variable-torque output

variable charges

variable-area nozzle

variable-area plotting

variable-area record section

variable-area recording (VAR)

variable-displacement pump

variable-lift cam

variable-speed with speed control

variable-sweep wing

infinitely variable

variable restrictor

variable sweep delta wing

variable sweep wing

variable-area propelling nozzle

variable-delivery piston pump

variable geometry (VG)

variable dihedral airplane

fundamental equation of flow through the conduit of variable cross-section area