S
ECTION
1: G
ENERAL
C
IRRUS
D
ESIGN
T
HE
A
IRPLANE
SR20
1-10
P/N 11934-005
Table 2:
Meteorological Terminology
V
S 50%
Stalling Speed is minimum steady flight speed at which
the aircraft is controllable with 50% flaps.
V
SO
Stalling Speed is the minimum steady flight speed at
which the aircraft is controllable in the landing
configuration (100% flaps) at the most unfavorable
weight and balance.
V
X
Best Angle of Climb Speed is the speed at which the
airplane will obtain the highest altitude in a given
horizontal distance. The best angle-of-climb speed
normally increases slightly with altitude.
V
Y
Best Rate of Climb Speed is the speed at which the
airplane will obtain the maximum increase in altitude
per unit of time. The best rate-of-climb speed decreases
slightly with altitude.
Meteorological Terminology
Terminology
Definition
IMC
Instrument Meteorological Conditions are
meteorological conditions expressed in terms of
visibility, distance from cloud, and ceiling less than the
minima for visual flight defined in 14 CFR 91.155.
ISA
International Standard Atmosphere (standard day) is an
atmosphere where (1) the air is a dry perfect gas, (2) the
temperature at sea level is 15 °C, (3) the pressure at sea
level is 29.92 in.Hg (1013.2 millibars), and (4) the
temperature gradient from sea level to the altitude at
which the temperature is -56.5 °C is -0.00198 °C per
foot and zero above that altitude.
General Airspeed Terminology (Continued)
Terminology
Definition
Reissue A
