the Aviation Dictionary

azimuth, TACAN azimuth, and TACAN distance
measuring equipment (DME) at one site)
vibrating-reed frequency meter - An electronic meter
that uses a series of reeds to indicate the tuned
frequency. The display has several reeds that are each
tuned to vibrate at a specified and marked frequency.
When a particular frequency is in tune, the associated
reed vibrates and appears as a wider band, thus
indicating the frequency.
vibrating-type voltage regulator - A voltage regulator
for direct current generators or alternators. Uses
vibrating points to sense the voltage and provide a
varying resistance for the generator field current.
vibration - A quivering or trembling motion. The
motion of the particles of an elastic body or medium is
in alternately opposite directions from the position of
equilibrium when that equilibrium has been disturbed.
vibrating-reed frequency meter Vise-grip pliers
broadcasting. This bandwidth must range from 5 Hz to
in excess of 5 MHz.
video map - An electronically displayed map on the
radar display that can depict data such as airports,
heliports, runway centerline extensions, hospital
emergency landing areas, NAVAIDs and fixes,
reporting points, airwaylroute centerlines, boundaries,
handoff points, special use tracks, obstructions,
prominent geographic features, map alignment
indicators, range accuracy marks, minimum vectoring
altitudes.
view limiting device - A device used to limit the
viewing field of a pilot. This is typically used during
instrument training in order to allow the pilot to view
only the instruments directly in front of him or her,
entirely blocking references outside the aircraft.
Common view limiting devices include plastic hoods
and frosted goggles.
vibration insulator - A resilient support that helps
virga - Water or ice particles falling from a cloud,
isolate a system from steady state vibrations.
usually in wisps or streaks, and evaporating before
vibration isolator - A flexible, shock-mount support reaching the ground.
installed between a component and the structure.
virtual reality (VR)- A computer-based technology
Vibration isolators reduce damage to electronic units
that creates a sensory experience that allows a
by keeping heavy vibrations in the structure from being
participant to believe and barely distinguish a virtual
transmitted into the unit.
experience from a real one. VR uses graphics with
vibration meter - In turbine engines, a meter that animation systems, sounds, and images to reproduce
senses vibration, measured in MILS (thousandths of an electronic versions of real life experience.
inch) or in./sec. (inches per second) occurring at the
viscosimeter - An instrument used to measure the
engine outer casings. Typical limit: 3 to 5 MILS.
viscosity of a fluid.
vibration pickup - A small electrical generator that
viscosity - The resistance to flow. In composites, resins
transmits a turbine engine's vibration signal to a
have a viscosity rating that corresponds to how thick
vibration meter either in the aircraft or in a test cell.
they are.
vibrator - A relay that makes and breaks the flow of
viscosity index - The measure of a fluid's change in
direct current to produce pulsating DC, which can be
viscosity due to a change in temperature.
passed through an induction coil to change its voltage.
viscous - Having a thick, glutinous consistency, and a
vibrator ignition system - An older turbine engine
relatively high resistance to flow.
ignition system that uses no storage capacitors.
- -
viscous damping - Diminishing the amount of vibration
vibratory torque control - The special patented
by use of a fluid that turns some of the vibration energy
coupling between the crankshaft and propeller shaft of
into heat by pushing fluid through an orifice. A fluid
a Continental Tiara engine. It incorporates a quill shaft
viscous damper also dissipates energy by redirecting
to absorb torsional vibrations and a centrifugally
the force, producing a damping pressure that creates a
actuated mechanism to lock out the quill shaft for
force that is 90 degrees out of phase with the vibration.
operation when a solid shaft would be more
advantageous.
vise - An adjustable tool that holds work and has two
jaws that open and close by means of a screw, lever, or
Victor Airway - An airway system based on the use of
cam..
VOR facilities. The north-south airways have odd
numbers (Victor ll), and the east-west airways have Vise-grip pliers - A brand
even numbers (Victor 14).
name of locking pliers.
Locking is accomplished
video - The electronic circuit components controlling or
by an over-center locking
producing the visual signals displayed on a CRT.
device. The - grip - width of
video amplifier - An electronic component that can the pliers is variable
amplify signals over a bandwidth sufficient to cover through an adjusting screw in the handle.
the requirements of color video recording and
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