positions.
turbofan engine    A gas turbine that uses a fan of greater
    diameter than the engine attached to the forward end of
    the compressor.  The fan accelerates a large quantity of
    air rearward, bypassing the entire basic engine and
    providing a large increase in thrust.
turn and bank   A gyroscopic flight instrument which
    indicates rate of change of heading, calibrated in "needle
    widths."
TWS   Threat Warning System -- An electronic device that
    displays air and ground radars.

V/STOL   Vertical/Short Takeoff and Landing.
vane    A flat or curved surface exposed to a flow of air,
    so as to be impelled to move or to rotate about an axis to
    redirect the flow (as in a turbine) or itself to be the
    impeller.
vectored thrust   See  thrust vectoring.
vertical velocity   The sink or climb rate of an aircraft.
vulture's row   Slang for the observation deck on an
    aircraft carrier's island, from which flight operations