User manual

Page 19

Aircraft Operation Manual

Piper Cheyenne I, IA, II, IIXL

For ight simulation use only

(b) Meteorological Terminology

ISA International Standard Atmosphere in which:

(1) The air is a dry perfect gas;

(2) The temperature at sea level is 15°C (59°F)

(3) The pressure at sea level is 29.92 inches (1013.2 mb).

(4) The temperature gradient from sea level to the altitude

at which the temperature is -56.5°C (-69.7°F) is -0.00198°C

(-0.003564°F) per foot and zero above that altitude.

OAT Outside Air Temperature is the free air static temperature ob-

tained either from in ight temperature indications or ground

meteorological sources, adjusted for instrument error and

compressibility effects.

IPA Indicated Pressure Altitude is the number actually read from

an altimeter when the barometric subscale has been set to

29.92 inches of mercury (1013.2 millibars).

SP Station Pressure is the actual atmospheric pressure at eld ele-

vation.

Wind The wind velocities recorded as variables on the charts of this

manual are to be understood as the headwind or tailwind

components of the reported winds.

Takeoff Power Maximum power permissible during takeoff.

Maximum Con- Maximum power permissible continuously during takeoff,

tinuous Power one engine inoperative and emergency operations only.

Maximum Maximum power permissible during climb (Maximum normal

Climb Power operating power).