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.  -59-