MD Helicopters MILVIZ MD530F, Руководство по летной эксплуатации вертолетов, Страница: 188 / 326

FAA Approved
Revision 5
5
−
30
CSP
−
HE/HS
−
1
Performance Data
MD 500
(Models 369HE/HS/HM) ROTORCRAFT FLIGHT MANUAL
Use Of Chart:
The primary use of the chart is illustrated by the example below and by the
sample arrows shown on the chart. To determine power check values, it is nec-
essary to read and record engine TORQUE PRESSURE, TURBINE OUTLET
TEMPERATURE, PRESSURE ALTITUDE, and OAT while the helicopter is
flown in level flight at 103 percent N
2
.
Example:
Wanted: Check engine performance
Data obtained during flight:
Torque = 52.0 psig
TOT
= 600
°
C
PA = 2000 feet
OAT = 10 ° C
Method: Enter the at 52.0 psi torque. Move right along the 52.0 psig torque
line to the 2000 foot pressure altitude curve, move up to the 10
°
C
OAT curve; now move left and read specification TOT of 610 ° C.
Compare the specification TOT of 610
°
C with the TOT observed
during flight (600
°
C for this example). The TOT that was observed
is lower than the specification TOT. If the TOT observed had been
higher than the specification TOT read from the chart, some power
deterioration will have occurred and the performance data given in
this manual may not be obtained.
When trend check procedures indicate engine power deterioration,
refer to the Allison Operation and maintenance Manual for correc-
tive action.
NOTE
Data obtained during engine operation with the bed valve not fully closed will
result in incorrect comparisons of actual versus specification TOT.
Actual engine horsepower any be obtained by entering the chart at the ob-
served engine torque pressure, moving horizontally along the torque line to
the horsepower curve, and then moving down to read the engine shaft
horsepower.