
MD 500
(Models 369HE/HS/HM)
ROTORCRAFT FLIGHT MANUAL
CSP
−
HE/HS
−
1
FAA Approved
Revision 5
2
−
9
2
−
8. POWER PLANT LIMITS
−
ALLISON 250
−
C18
Engine torque limits:
Maximum takeoff (5 minute): 80.3 psi torque.
Maximum continuous: 70 psi torque.
Transient torque limits:
80.4 to 90.0 psi torque for 10 seconds at 104 percent N
2
.
90.1 to 100.0 psi torque for 3 seconds at 104 percent N
2
.
Turbine outlet temperature limits:
Maximum takeoff (5 minute): 749
°
C
Maximum continuous: 693
°
C
Maximum for starting (lightoff): 150
°
C
Transient limits:
During start and shutdown: 749
°
C to 927
°
C for up to 10 seconds with a
momentary peak temperature of 927
°
C for not more than 1 second.
During power changes in flight: 749
°
C to 843
°
C for 6 seconds.
Gas producer (N
1
) speed limits:
Maximum continuous: 104%.
Ground idle speed 62 − 67%.
NOTE
:
During autorotative flight, the N
2
governor may reduce N
1
below 62 percent.
Transient limits: 105% for 15 seconds.
N
2
limits:
Normal Power On operation: 103% to 104% N
2
.
Transient over speed limit (15 seconds maximum): 110% (red dot on N
2
scale) at idle power varying linearly to 106% at 80.3 psi torque.
Engine oil system limits:
Flight operation temperature limits:
0
°
C to 107
°
C provided engine oil pressure is within limits.
NOTE
:
These engine oil temperature limits pertain to all gauge configurations. 0°C is
when the needle is at the bottom of the yellow/green arc.
Flight operation pressure limits:
97 percent N
1
and above:
110 − 130 psig
78 to 97 percent N
1
speed:
90 − 130 psig
78 percent N
1
and below:
50 psig min.
Содержание MILVIZ MD530F
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