Piper Arrow PA-28R-201 Pilot Operating Handbook page 25

1
SECTION
GENERAL
1.19 SYMBOLS,
(b) Meteorological Terminology
ISA
OAT
Indicated
PressureAltitude
Pressure Altitude
StationPressure
Wind
REPORT: VB-1612
1-8
HB-PQY, Page: 1-8-(0)
ABBREVIATIONS,
International
which:
(I) Theairisadiyperfectgas.
(2) The temperature at sea level is 15° Celsius
Celsius
(3) The pressure atsea levelis29.92 inches
Hg (1013.2mb).
(4) The temperature gradient from sea level
to the altitude at which the temperature
is -56.5°C
(-0.003564°F) per foot and zero above
thataltitude.
Outside Air Temperature is the freeairstatic
temperature, obtained either from inflight
temperature
meteorological
instrument errorand compressibility effects.
The number
altimeterwhen
been set to 29.92 inches of merculy (1013.2
millibars).
Altitude measured from standard sea-level
pressure (29.92 in. Hg) by a pressure or
barometric
pressure altitudecorrected for position and
instrument
altimeter instrument errors are assumed
to be zero.
Actual
elevation.
The wind velocities recorded as variables
on the charts of this handbook
understood
components of the reported winds.
PA-28R-201,
AN]) TERMINOLOGY
StandardAtmosphere
(59° Fahrenheit).
(-69.7°F)
indications
sources, adjusted for instrument
read
actually
the barometric subscale has
altimeter. It is the indicated
error. In this handbook,
atmospheric pressure
as the headwind
ISSUED:
JULY
Issued: JULY 12, 1995
ARROW
(continued)
in
is 0.00198°C
or
ground
from an
at field
are to be
or tailwind
12, 1995
1-8