V Speeds Flashcards
V1
Takeoff decision speed. Below this speed you abort. Above you accelerate to VR and after rotation you accelerate to V2.
V2
Takeoff safety speed. Best climb gradient speed (best altitude increase per mile with the most critical engine inop.
V2MIN
Minimum takeoff safety speed. Usually 1.2 x VSO.
VA
Maneuvering speed. The highest safe airspeed for abrupt control deflection or turbulence. Decreases as weight decreases.
VABE
Max air brake extension
VABO
Max air brake operation
VAC
Missed approach climb speed for flap configuration with critical engine inop.
VAP
Approach target speed. VREF + configuration & wind factor.
VB
Design speed for maximum gust intensity. Turbulent air penetration speed.
VC
Design cruise speed.
VD
Design diving speed. Free of flutter, control reversal and buffeting.
VDEC
Accelerate / Stop DECision speed for multi engine piston and light multi engine turboprop.
VDF / VMDF
Demonstrated Flight Diving speed
VEF
Speed at which during testing the critical engine is assumed to fail at.
VENR
ENRoute climb speed with critical engine inop
VF
Design Flap speed
VFC / MFC
Maximum speed for undesirable Flight Characteristics (VNE)
VFE
Maximum Flap Extended speed (top of white arc)
VFR
Flap Retract speed (minimum)
VFS
Final Segment speed with critical engine inop
VFTO
Final TakeOff speed (en route configuration)
VH
Maximum speed in level flight with maximum continuous power
VLE
Maximum Landing gear Extended speed
VLLE
Maximum Landing Light Extended speed
VLO
Maximum Landing gear Operating speed
VLOF
Lift OFf speed (back pressure at VR)
VMCA or VMC
Minimum Control speed with critical engine inoperative out of ground effect in the Air (Red Line).
VMCG
Minimum speed to maintain directional Control following an engine failure on the Ground.
VMO / MMO
Maximum Operating limit speed (barber poll).
VMU
Minimum Unstick speed. Slowest speed at which an aircraft can become airborne.
VNE
Never exceed speed- “Red line”- Applies only to piston-powered airplanes. Any turbulence can easily overstress an aircraft at this speed.
VNO
NO go there. Maximum structural cruising speed–Beginning of the yellow arc- or caution range.
VR
Rotation speed. Start applying back-pressure on the yoke.
VREF
REFerence speed for final approach. 1.3 times VSO.
VS
Stall speed. Usuall does not correspond to a specific airspeed.
VS1
Stall speed in a specific configuration. Normally regarded as the “clean”-gear and flaps up-stall speed.
VSO
Stall speed in landing configuration–Lower limit of white arc.
VSSE
Minimum Safe Single Engine speed (multi).
VTOSS
Takeoff safety speed for category A rotorcraft.
VWWO
Maximum Windshield Wiper Operating speed.
VX
Best angle of climb speed. Vx increases with altitude and usually decreases with a reduction of weight.
VXSE
Best Single-Engine angle of climb speed (multiengine 12,500 Lbs or less).
VY
Best rate of climb speed- Greatest gain in altitude in the shortest possible time. Decreases as weight is reduced and also decreases with altitude. Best glide speed or maximum-endurance speed.
VYSE
Best Single-Engine rate of climb speed-“Blue line”.
