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shaft with blades which, together with
the engine, moves an aircraft through
the air
propeller blade propeller blade /prə|pelə bled/
noun one of the elements of a propeller
which generate lift when the unit is
turning
181 provide
propeller pitch propeller pitch /prə|pelə ptʃ/ noun
the distance a propeller would advance
in one rotation if there was no slip
propeller tip propeller tip /prə|pelə tp/ noun the
part of the blade of a propeller furthest
from the central hub
propelling nozzle propelling nozzle /prə|pelŋ
nɒz(ə)l/ noun the extreme rear part of
the jet engine where the jet exhaust
enters the atmosphere
properly properly /prɒpəli/ adverb correctly

When the chart is properly orientated, it
is easier to compare distance between
landmarks.
The pinpoint is a very positive
means of establishing position, as
long as the feature is properly identified.
property property /prɒpəti/ noun 1. a characteristic
or quality
Mass is a basic
property of matter.
One of the properties
of mercury is that it is liquid at
room temperature. 2. the things that
somebody owns, possessions  personal
property things belonging to a
particular person
propjet propjet /prɒpd"et/ noun same as turboprop
proportion proportion /prə|pɔʃ(ə)n/ noun 1.
part of the whole compared with
another part
Only a small proportion
of passengers absorb the pre-departure
safety information. 2.  in proportion
to directly related to
The force
required to move the control column is
in proportion to the force being exerted
by the control surface.
proportional proportional /prə|pɔʃ(ə)n(ə)l/
adjective 1. comparable 2. related 
(directly) proportional directly related

The wind blows along contours with
low values on the left, and the speed is
directly proportional to the contour
gradient.  inversely proportional so
that as one thing increases and another
decreases by the same amount
Temperature
is inversely proportional to
altitude.
The magnitude of the pressure
gradient force is inversely proportional
to the distance apart from the isobars.
propulsion propulsion /prə|plʃən/ noun an act
or instance of pushing or driving forwards
(NOTE: The verb is to propel.)
propulsive propulsive /prə|plsv/ adjective
pushing or driving
The propeller is a
means of converting engine power into
a propulsive force called thrust. (NOTE:
The verb is to propel.)
propulsive power propulsive power /prə|plsv
paυə/ noun the power needed to produce
thrust
protect protect /prə|tekt/ verb to keep from
harm, injury or damage
Gloves are
worn to protect the hands in the event of
a fire.
protection protection /prə|tekʃən/ noun the act
of keeping something from harm, injury
or damage  fire protection action or
measures taken to prevent fire
protective protective /prə|tektv/ adjective
referring to something which keeps
something else from harm, injury or
damage
Busbars are insulated from
the main structure and are normally
provided with some form of protective
covering.
protrude protrude /prə|trud/ verb to extend
above a surface
Prominent mountains
frequently protrude above low-lying
cloud and mist.
protrusion protrusion /prə|tru"(ə)n/ noun
something which protrudes or extends
above a surface
When it has been necessary
to physically remove a layer of
snow, all protrusions and vents should
be examined for signs of damage.
prove prove /pruv/ verb 1. to show that
something is true
The pilot proved
that she was not at fault. 2. to be found
to be, to be discovered to be (NOTE:
proving – proved – has proved or has
proven)  to prove useful to be discovered
as useful by experience  dry
chemical extinguishers are used primarily
for electrical fires and have
also proved effective on liquid fires it
was discovered that, although these
extinguishers were designed for electrical
fires, they were good at putting out
liquid fires such as petrol fires
provide provide /prə|vad/ verb to supply or
to give
Radio altimeters provide a
continuous indication of height above
the surface immediately below the aircraft
up to a maximum of 5,000 feet.

　
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