 |
CLICK HERE
TO ENTER
|
|
Aviation Glossary of Terms
Please select a letter from below.
You will then be presented with a list of aviation terminology beginning
with that letter.
A B
C D
E F
G H
I J
K L
M N
O P
Q R
S T
U V
W X
Y Z
V speeds - designations
for certain velocities relating to aircraft operation, thus:
-
V1 - decision speed, up to
which it should be possible to abort a take-off and
stop safely within the remaining runway length. After reaching V1 the
take-off
must be continued.
-
Va - design manoeuvring speed.
The speed below which abrupt and extreme
control movements are possible (though not advised) without exceeding
the
airframe's limiting load factors.
-
Vfe - maximum flap extension
speed (top of white arc on ASI).
-
Vmca - minimum control speed
(air). The minimum speed at which control of a
twin-engined aircraft can be maintained after failure of one engine.
-
Vmo - maximum operating speed.
Also Mmo, Mach limit maximum operating speed.
-
Vne - never-exceed speed,
'redline speed' denoted by a red radial on an ASI.
-
Vno - normal operating speed.
The maximum structural cruising speed allowable f
or normal operating conditions (top of green arc on ASI).
-
Vr - rotation speed, at which
to raise the nose for take-off. Vso stalling speed
at MTWA, in landing configuration with flaps and landing gear down, at
sea level,
-
Vx - best angle of climb speed
on all engines.
-
Vxse - best engine-out angle
of climb speed.
-
Vy - best rate of climb speed
on all engines.
-
Vyse - best engine-out rate of
climb speed, 'blueline speed' (blue radial on ASIs of light twins)
VAL - design manoeuvring
speed. The speed below which abrupt and extreme
control movements are possible (though not advised) without exceeding
the airframe's limiting load factors.
VAL - visual approach and landing chart.
var - variation (magnetic)
VASIS - visual approach slope indicator system. A coloured light
system providing
visual guidance to the glidepath of a runway.
VDF - very-high frequency direction-finding, whereby an
aircraft's bearing from a
ground receiving station may be determined from its RT transmissions.
vdu - visual display unit.
VFR - Visual Flight Rules. Prescribed for the operation of
aircraft in visual meteorological
conditions (VMC).VMC is generally defined as five miles visibility or
more and 1,000 feet
vertical and one nautical mile horizontal clearance from cloud, but
variations apply to
aircraft operating below 3,000 feet amsl. Special VFR (SVFR) clearances
are granted at
the discretion of ATC for VFR flight through some controlled airspace
where IFR usually apply.
Also CVFR, Controlled VFR Flight.
VHF - very high frequency. Radio frequencies in the 30-300 MHz
band, used for most civil
air-to-ground communication.
vis - visibility.
VLF - very low frequency. Radio frequencies in the 3-30 kHz band
VLF/Omega - worldwide system of long-range navigation using VLF
radio transmission.
VMC - Visual Meterorological Conditions. See VFR, above.
Vnav - vertical navigation.
Volmet - continuous recorded broadcasts of weather conditions at
selected airfields.
VOR - very high frequency omnidirectional range. A radio
navigation aid operating in
the 108-118 MHz band. A VOR ground station transmits a two-phase
directional signal
through 360ø. the aircraft's VOR receiver enables a pilot to identify
his radial or bearing
from/to the ground station. VOR is the most commonly used radio
navigation aid in private
flying. Increased accuracy is available in Doppler VORs (DVOR) which
have replaced
some VOR is the UK system. Also VORTAC, combined VOR and TACAN, and VOT,
VOR test facility.
VP - variable-pitch (propeller), whose blade angle can be altered
in flight either automatically
or manually.
VRP - visual reference point. (In the UK) Landmarks used for
position reporting by aircraft
operating VFR.
VSI - vertical speed indicator. One of the primary flight
instruments showing rate of climb or
descent. Also IVSI, instantaneous VSI.
|
|
|
|
|
|
|
|
|
|
|
|
|
Keep up to date with
what's going on at PPL Mania...
We have lots of new
articles and features planned in the near furture. Register your details with
us and we will contact you as and when the new features appear.
|
|
PPL Mania ensures that all
information provided to us will be treated in the strictest confidence
and will not be distributed or sold to any third party. |
|
|
