GRUMMAN AMERICAN
FOR TRAINING USE ONLY – SECTION 2
MODEL GA‐7/COUGAR
LIMITATIONS
2‐5
Issued: April 10, 1978
POWER PLANT LIMITATIONS
Limitations of the power plant are provided in the following data:
Engine Manufacturer:
Avco Lycoming
Engine Model Number:
O‐320‐D1D
Engine Operating Limits for Takeoff and Continuous Operations:
Maximum Power:
160 BHP
Maximum Engine Speed:
2700 RPM
Maximum Cylinder Head Temperature:
500° F (260° C)
Maximum Oil Temperature:
245° F (118° C)
Oil Pressure (Normal Operating):
Idling:
25 PSI
Minimum:
60 PSI
Maximum:
90 PSI
Oil Pressure (Start and Warm‐up):
Maximum:
100 PSI
Fuel Pressure (Inlet to Carburetor):
Minimum:
0.5 PSI
Maximum:
8.0 PSI
Refer to Section 8 for fuel and oil specifications.
PROPELLERS
Number of Propellers:
2
Manufacturer:
Hartzell
Model Number:
HC‐F2YL‐2UF/FC7663D‐3
Spinner Assembly:
7SCF022
Number of Blades:
2
Diameter:
Not over 73 inches
Not under 72 inches (No Further Reduction Permitted)
Blade Range at 30 Inch Station:
Low Pitch – 11.5° ± 0.1°
Feather Angle – 81° ± 1°
Operating Limits:
2700 RPM (Maximum Speed)
Constant Speed
