Turbojet -- engine most commonly used in high-speed, high-altitude aircraft.
Turboprop engine -- one in which a turbine rotor converts the energy of the expanding gases to
rotational shaft power, to provide power for a propeller.
Turboshaft -- engine in which a turbine rotor converts the energy of the expanding gases to rotational
shaft power, to provide power for a helicopter transmission.
Vapor blasting -- abrasive method used to clean combustor parts.
Not to be used on ceramic,
magnesium, painted, or aluminum surfaces.
Vapor degreasing -- cleaning method used on unpainted metal parts or aluminum-painted steel parts.
Vaporizing tubes -- devices used instead of fuel nozzles in a T53-L-11 engine.
Variable inlet guide vanes -- devices located in front of the first compressor rotor to guide the angle of
incidence of the inlet air to the first compressor rotor.
Velocity -- speed or rate of motion in a given direction, and in a given frame of reference.
Venturi -- short tube with flaring ends connected by a constricted middle section forming a throat. It
depends for operation upon the fact that as the velocity of a fluid increases in the throat, the
pressure decreases. It is used for measuring the quantity of a fluid flowing in connection with
other devices for measuring airspeed and for producing suction, especially for driving aircraft
instruments by means of a branch tube joined at the throat.
Vermatherm element -- device which senses outlet fuel temperature and closes the core valve and opens
the bypass valve.
Vibration -- periodic motion of a body or medium in alternately opposite directions from the position of
equilibrium. Vibration meter--device for measuring vibrations.
Weldment -- unit formed by welding together an assembly of pieces, as in gear housing.