Cessna 172P - Engine Power Terminology; And Flight Planning Terminology

CEggNA
MODEL
172P
Standard
Tempera-
ture
Pressure
Altitude
BHP
R,PM
Static
RPM
Demon-
strated
Crosswind
Velocity
Usable FueI
Unusable
Fuel
GPH
NMPG
ú
Þ
It is expressed
in either degrees Celsius
or degrees
Fah-
renheit.
Stand¡rd
Temperature
is
15oC a,t sea,
level
pressure
alti-
tude and decreases by ZoC for each
1000 feet
of
altitude.
SECTION
1
GENERAL
Bral¡e
lloreepower
is the
power
developed
by the engine,
Revolutlons Per
Mlnute
ís engine speed.
Static
RPM is engine
speed attained during a
full-throttle
engine runup
when the airplane is on the
ground
and
stationary.
Demonstrated
Croesrrind
Velocit¡r
is the velocity
of the
crosswind
oomponent for which
adequate
control
of the
airplane
during
takeoff and landing was actually
demon-
strated during
certification
tests. The value shown
is not
considered
to be limiting.
Usable Fuel
is the
fuel available for flight
planning.
Unusable
Fuel is the
quantifV
of fuet that can
not
be
safely
used in
flight.
Gallone
Per
Hour is
the amount of fuel
(in
gallons)
consumed
per
hour.
Nautical
Miles
Per
Gallon is the
distance
(in
nautical
miles)
which
can
bo expected
per gallon
of fuet cousumed
at a specific
engine power
setting
and/or
flight configura-
tion.
P¡es¡u¡e Ntltude is the
attitude
read from an
altimeter
when the altimeter's barometric
scale
has been set
to 29.92
inches
of mercury
(1018
mb).
ENGINE POWER
TERMINOLOGY
)
AIRPLANE
PERFORMANCE
AND FLIGHT PI.ANNING
TERM¡NOLOGY
30
May 1980
g
is
acceleration
due to
gravity
1-7