SECTION 2
CESSNA
LIMITATIONS
MODEL 172RG
AIRSPEED LIMITATIONS
Airspeed limitations and their operational significance are shown in
figure 2-1.
SPEED
KCAS
KIAS
REMARKS
V
NE
Never Exceed Speed
161
164
Do not exceed this speed in
any operation.
V
NO
Maximum Structural
Cruising Speed
1 42
1 45
Do not exceed this speed
except in smooth air, and
then only with caution.
V
A
Maneuvering Speed:
2650 Pounds
2250 Pounds
1 850 Pounds
105
96
87
1 06
98
89
Do not make full or abrupt
control movements above
this speed.
VFE
Maximum Flap Extended
Speed:
To 10° Flaps
10
0
- 30° Flaps
130
101
130
100
Do not exceed these speeds
with the given flap settings.
V
LO
Maximum Landing Gear
Operating Speed
1 38
140
Do not extend or retract
landing gear above this
speed.
V
LE
Maximum Landing Gear
Extended Speed
161
164
Do not exceed this speed
with landing gear extended.
Maximum Window Open
Speed
1 61
164
Do not exceed this speed with
windows open.
Figure 2-1. Airspeed Limitations
AIRSPEED INDICATOR MARKINGS
Airspeed indicator markings and their color code significance are
shown in figure 2-2.
2-4
1 July 1979
CESSNA
SECTION 2
MODEL 172RG
LIMITATIONS
MARKING
KIAS VALUE
OR RANGE
SIGNIFICANCE
White Arc
42 - 100
Full Flap Operating Range. Lower
li mit is maximum weight V
So
in
landing configuration.
Upper limit
is maximum speed permissible with
flaps extended.
Green Arc
50 - 145
Normal Operating Range. Lower limit
is maximum weight V
S
at most forward
C.G. with flaps retracted. Upper limit
is maximum structural cruising speed.
Yellow Arc
145 - 164
Operations must be conducted with
caution and only in smooth air.
Red Line
164
Maximum speed for all operations.
Figure 2-2. Airspeed Indicator Markings
POWER PLANT LIMITATIONS
Engine Manufacturer: Avco Lycoming.
.
Engine Model Number: O-360-F1A6
Engine Operating Limits for Takeoff and Continuous Operations:
Maximum Power: 180 BHP rating.
Maximum Engine Speed: 2700 RPM.
Maximum Cylinder Head Temperature: 500°F (260°C).
Maximum Oil Temperature: 245°F (118°C).
Oil Pressure, Minimum: 25 psi.
Maximum: 100 psi.
Fuel Pressure, Minimum: 0.5 psi.
Maximum: 8.0 psi.
Propeller Manufacturer: McCauley Accessory Division.
Propeller Model Number: B2D34C220/80VHA-3.5
Propeller Diameter, Maximum: 76.5 inches.
Minimum: 75.5 inches.
Propeller Blade Angle at 30 Inch Station, Low: 12.0°.
High: 26.5°.
1 July 1979
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