## OPERATING LIMITS FOR WRIGHT VlliiRLWIND R-975-28 

## K~3 to K-8 Airships 

Minimum Oil Inlet Temperature for Take-Off .•.•.•••••••••••• 104°F. or 40°C. 

Desired Oil Temperature •••••••• 140°F. or 6o 0 c. 

Maximum Inlet Temperature •••••• 190°F. or 88°C. 

Maximum Cylinder Temperature for Take-Off ••••••••••••••••• 500°F. or 260°C. 

Maximum Cylinder Temperature (Cruising) ••••••••••••••••••• 450°F. or 230°C. 

Desired Cylinder Temperature ••• 325°F. or 163°C. 

Minimum. Oil Pressure (Idling) .................... . 10 lbs./sq.in. 

Minimum Oil Pressure (Cruising) ••••••••••••••••••• 50 lbs./sq.in. 

Desired Oil Pressure •••••••.• ~. 60-~0 lbs./sq.in. 

F’uel Press11re ....... .......... . 2.5-3.5 lbs./sq.in. 

