Aircralt Publ~cntions
Piper Commchc
250
(Early
Model)
Section
-
1
General
SYMBOLS, ABBREVIATIONS AND TERMINOLOGY (Cont.)
VMC Visual Evleteorological Conditions
-
Meteorological conditions expressed in terms
of
visibility, distance from clouds, and ceilings equal to or greater than specified minima.
Wastegate
A
controllable butterfly valve in the exhaust system used to direct exhaust gasses to
adjust the speed of the turbocharger and thereby determine manifold pressure of the engine.
3.)
V Speeds:
V, Design Maneuvering Speed, and Turbulent Air Penetration Speed
-
The maximum airspeed at
which application of full available aerodynamic control will not over-stress the aircraft.
Equal to the square root of the limit load factor times Vsl.
VApp Final Approach To Landing Speed
-
The airspeed recommended for touchdown. Typically
equal to 1.3 times Vso.
V, Design Speed For Maximum Gust Intensity
-
Maximum airspeed at which a specified gust
(e.g, plus or minus
30
feet per second) can be withstood without airframe damage.
Vc Design Cruising Speed
-
Speed used to establish structural strength,
VD Demonstrated Diving Speed
-
The highest airspeed which was actually demonstrated during
certification tests of the aircraft. Equal to
1.4
times
Vc.
VFE Maximum Flap Extension Speed
-
The highest airspeed permissible with the wing flaps in a
prescribed (extended) position. (Top of white
arc.)
VE Maximum Operating Speed
-
The highest airspeed obtainable with maximum continuous
power in level flight.
VIMD Minimum Drag Speed and Maximum Endurance Speed
-
The airspeed that results in the
greatest time aloft.
VIMR Maximum Range Speed
-
The airspeed that results in the least amount of he1 consumed for
distance traveled.
VLE Landing-Gear Extended Speed
-
The highest airspeed at which the aircraft can be operated
with the landing gear extended.
VLO Landing-Gear Operation Speed
-
The highest airspeed at which the landing gear can be
extended or retracted.
VLop Lift-off Speed
-
The speed at which a plane becomes airborne
Copyright:
1993
Page
1-19
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