4-3
ENGINE LIMITATIONS
6.
The following engine limitations are applicable:
Engine Horsepower
Maximum (5 minutes
– takeoff)
300 BHP
Maximum Continuous
285 BHP
Recommended Max Cruise (75%)
215 BHP
RPM
Maximum (takeoff - 5 minutes)
2850 RPM
Maximum Continuous
2700 RPM
Normal operating range
– all regimes
2250-2700 RPM
Normal operating range - Cruise
2250-2550 RPM
Manifold Pressure
(MAP)
Maximum Continuous
28.8”
Normal operating range
15-
25”
CAUTION
Do not exceed 20” MAP below 2250 RPM.
Starter
Maximum Duty Cycle / Cooling Period
30 secs / 3 mins
Oil Pressure
Minimum (at idle)
10 psi
Normal operating range
30-60 psi
Maximum (cold oil)
100 psi
Oil Temperature
Minimum for run-up
75º F
Minimum for takeoff
75º F
Normal operating range
100- 240º F
Maximum
240º F
Fuel Pressure
Minimum
3.5 psi
Maximum
19.5 psi
Fuel Flow Rate
Normal Operating Range
7
– 17 GPH
Maximum
25.2 GPH
Cylinder Head
Temp (CHT)
Minimum for run-up
200º F
Minimum for take-off
200º F
Maximum (do not exceed)
460ºF
Normal operating range
200- 400º F
CAUTION
Do not permit CHTs to drop below 300ºF > 5 minutes
Exhaust Gas Temp
Normal operating range
1100-1500ºF
Suction
Minimum
4.5” Hg
Maximum
5.5” Hg
Figure 4-3 Engine Operating Limitations
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