CIRRUS DESIGN SR20, Pilot Operating Handbook

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P/N 11934-003 1-9
Cirrus Design Section 1
SR20 General
Meteorological Terminology
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 which results in the
greatest gain of altitude in a given horizontal distance.
V
Y
Best Rate of Climb Speed is the speed which results in the
greatest gain of altitude in a given time.
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 FAR 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.
MSL Mean Sea Level is the average height of the surface of the
sea for all stages of tide. In this Handbook, altitude given as
MSL is the altitude above the mean sea level. It is the
altitude read from the altimeter when the altimeter’s
barometric adjustment has been set to the altimeter setting
obtained from ground meteorological sources.
OAT Outside Air Temperature is the free air static temperature
obtained from inflight temperature indications or from
ground meteorological sources. It is expressed in either
degrees Celsius or degrees Fahrenheit.
• Pressure Altitude is the altitude read from the altimeter
when the altimeter’s barometric adjustment has been set to
29.92 in.Hg (1013 mb) corrected for position and instrument
error. In this Handbook, altimeter instrument errors are
assumed to be zero.
Revision A5