Piper PA-24-250 COMANCHE Pilot Operating Handbook page 27

Aircrafi Publications
Pipcr
Commchc
250 (Early Model)
Section
-
1
General
SYMBOLS, ABBREVWTIONS AND TERMINOLOGY (Cont.)
ICAO International Civil Aviation Organization - An agency of the United Nations with
headquarters in Montreal, Quebec, Canada. Formed in 1947 with the objective of
developing principals and techniques of international air navigation and the establishment of
standards for international civil air transport.
ICS International Comanche Society
-
An organization formed in 1972 as a nonprofit
corporation by pilots and others interested in Piper Comanche airplanes to exchange
experiences and foster sate and economical flying.
JFR Instrument Flight Rules - Rules governing the procedures for conducting an instrument
flight plan under instrument meteorological conditions.
I M C Instrument Meteorological Conditions
-
Meteorological conditions expressed in terms of
visibility, distance from clouds, and ceilings less than the minima for VFR flight.
Indicated Altitude The uncorrected altitude read directly from the altimeter after it is set to the
current local barometric pressure.
Intercooler A Radiator used to extract heat from the air discharged from the compressor of a
turbocharger before it enters the he1 metering system of a reciprocating engine.
ISA International Standard Atmosphere
-
Reference: Standard Atmosphere. Equal to 15 degrees
Celsius (59 degrees Fahrenheit) at sea level pressure of 29.92 inches Hg (1013.2 millibars or
101.3 Wa) and decreases at a lapse rate of approximately 2 degrees Celsius (5 degrees
Fahrenheit) for each
1000
foot increase in altitude.
Laminar Flow Airfoil A type of airfoil design that is shaped so that its thickest section is fixther
afi than a standard airfoil. Air passes over the forward portion of the wing in a smooth
bounda~y layer. The purpose of this design is to reduce drag by delaying the onset of
turbulence for as long as possible. Laminar flow airfoils are used on various high-
performance airplanes.
Licensed Empty Weight Obsolete term used prior to 1976 to indicate that the airplane was
painted and ready for delivery. This figure typically included hydraulic fluid and unusable
fuel, but no engine oil.
Manifold Pressure The induction system pressure measured downstream from the engine
throttle valve. (See: MAP)
MAP Manifold Air Pressure
- Reference: Manifold Pressure
( I d ? ' )
the air pressure within the
induction system of the engine. Used as an indirect means to determine power developed by
the engine, and traditionally measured in inches of mercury.
Maximum Landing Weight The maximum weight approved for the aircraft for the landing
touchdown.
Copyright: 1993
Page
1-15