the Aviation Dictionary

V1 -maximum speed in the
takeoff at which the pilot must
take the first action (e.g., apply
brakes, reduce thrust, deploy
speed brakes) to stop the airplane
within the accelerate-stop
distance. V1 also means the
minimum speed in the takeoff,
following a failure of the critical
engine at V,,, at which the pilot
can continue the takeoff and
achieve the required height
above the takeoff surface within
the takeoff distance.
V1- Pulse jet powered flying
bomb.
V2 - Liquid fuel rocket
V1 -takeoff safety speed
V2 MIN - minimum takeoff safety
speed
VA - design maneuvering speed
VAC - volts of alternating
current
VAPTAD - volcanic ash
transport and dispersion chart
VAPC - variable absolute
pressure controller
VAR - volcanic activity
reporting
VAR - volt-ampere reactive
VASI - visual approach slope
indicator
VB - design speed for maximum
gust intensity
VBV - variable blade vane
Vc - design cruising speed
VCOA - visual climb over the
airport
VD - design diving speed
VDA - vertical descent angle
VDC - volts of direct current
VDF/MDF - demonstrated flight
diving speed
VDME - VOR with distance
measuring equipment
VDP - visual descent point
VEF - speed at which the critical
engine is assumed to fail during
takeoff
VF - design flap speed
VF -voice frequency
VFC/MFC - maximum speed for
stability characteristics
VFE - maximum flap extended
speed
VFO - variable-frequency
oscillator
VFR - visual flight rules
VmO - final takeoff speed
VGSI - visual glide slope
indicator
VH - maximum speed in level
flight with maximum continuous
power
VHF - very high frequency
VHF/DF - VHF direction finder
VIP - very important person
(dignitary)
VIP - video integrator and
processor (thunderstorm
intensity standard)
VLE - maximum landing gear
extended speed
VLF - very low frequency
VLO - maximum landing gear
operating speed
VLoF - lift-off speed
VLV - valve
VMc - minimum control speed
with the critical engine
inoperative
VMC - visual meteorological
conditions
VMC - visual meteorological
conditions
Vmini - minimum speed -
VM&lMo - maximum operating
limit speed
VMU - minimum unstick speed
VNAV - vertical navigation
VNAV -visual navigational aids
VNE - never-exceed speed
VNO - maximum structural
cruising speed
Aircraft Technical Book Company
P.O. Box 270
Tabernash, CO 80478
http:llw.ACTechbooks.com
VNTSC - Volpe National
Transportation System Center
VON - virtual on net
VOR - very high frequency omni
directional range
VORIDME - collocated VOR
and DME navaids
VORTAC - collocated VOR and
TACAN
VOT - VOR test facility
VR - rotation speed
VR - VFR military training route
VREF - reference landing speed
VRS - voice recording system
Vs - stalling speed or the
minimum steady flight speed at
which the airplane is controllable
Vso - stalling speed or the
minimum steady flight speed in
the landing configuration
Vsl - stalling speed or the
minimum steady flight speed
obtained in a specific
configuration
VSCS - voice switching and
control system
VSI - vertical speed indicator
VSR - reference stall speed
VsRl -reference stall speed in a
specific configuration
Vs~o - reference stall speed in
the landing configuration
VSTOL - vertical or short
takeoff and landing
VSV - variable stator vane
Vsw - speed at which onset of
natural or artificial stall warning
occurs
VSWR - voltage standing-wave
ratio
VTA - vertex time of arrival
VTAC - VOR collocated with
TACAN
VTOL - vertical takeoff and
landing
VToss - takeoff safety speed for
Category A rotorcraft