TM 1-1510-224-MTF
6.
POWER levers - Full forward (do not exceed TGT and/or N1
Maximum N1 is 104%. Maximum TGT is 840C.
*SPEED PERFORMANCE AT MAXIMUM CRUISE POWER
NOTE
A new or rebuilt engine operated at the torque value
presented in the Maximum Cruise Speed and Power
chart (figure 4) will show a TGT margin below the
maximum cruise limit for the torque value presented
in the table. With ice vanes retracted, cruise torque
settings shown on the Maximum Cruise Speed and
Power chart (figure 4) shall be obtained without
exceeding TGT limits.
Speed-power runs shall be made in smooth air to determine
consistency with performance figures. Determine torque settings, fuel
flow, and airspeed to be achieved by referencing Maximum Cruise
Speed and Power Chart (figure 4).
1.
Record the following:
*(a) Engine serial number.
*(b) Engine hours since new.
*(c) Engine hours since overhaul.
2.
Altitude - 25, 000 feet pressure altitude.
3.
Propeller RPM - 1700 RPM.
4.
Ice vanes - Retracted.
5.
FAT - Determine and record.
6.
Power setting - Read torque for the recorded FAT from figure 4.
7.
Set torque on left and right engines to the torque from figure 4.
8.
Verify that pilot’s and copilot’s airspeed indicators agree within
4 KIAS, and that neither indicator reads more than 3 KIAS less
than the chart value.
4-4
