Airspeed Indicator Markings; Engine Instrument Markings; Fuel Quantity Indicators - Cessna 172 1969 Owner's Manual

AIRSPEED LIMITATIONS (CAS)
The following is a list of the certificated calibrated airspeed
(CAS) limitations for the airplane.
Never Exceed Speed (glide or dive, smooth air)........... 174 MPH
Maximum Structural Cruising Speed .............. .............. 140 MPH
Maximum Speed, Flaps Extended .................... .............. 100 MPH
*Maximum Maneuvering Speed ........................ .............. 122 MPH
*The maximum speed at which abrupt control travel
can be used without exceeding the design load factor.

AIRSPEED INDICATOR MARKINGS

The following is a list of the certificated calibrated airspeed
markings (CAS) for the airplane.
Never Exceed (glide or dive, smooth air)...... 174 MPH (red line)
Caution Range........................................140-174 MPH (yellow arc)
Normal Operating Range ........................ 49-140 MPH (green arc)
Flap Operating Range .............................. 52-100 MPH (white arc)
ENGINE OPERATION LIMITATIONS
Power and Speed ......................................... 150 BHP at 2700 RPM

ENGINE INSTRUMENT MARKINGS

OIL TEMPERATURE GAGE
Normal Operating Range ....................................................Green Arc
Maximum Allowable.................................................245
OIL PRESSURE GAGE
Minimum Idling.........................................................25 psi (red line)
Normal Operating Range ............................... 60-90 psi (green arc)
Maximum ................................................................ 100 psi (red line)

FUEL QUANTITY INDICATORS

Empty (2.0 gallons unusable each tank)...................... E (red line)
F (red line)
O
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