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TRIM AND RIGGING - TM-1-1510-223-MTF0128
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TM-1-1510-223-MTF Maintenance Test Flight Manual Army Model RC-12
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ENGINE PERFORMANCE AT MAXIMUM CONTINUOUS POWER
TM 1-1510-223-MTF
6.  POWER levers Full forward (do not exceed TGT and/or No.
Maximum N. is 104%. Maximum TGT is 840C.
* D. 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 Maxi- mum 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.
9.
Allow conditions to stabilize for one minute, then record the
following for each engine being tested.
4-4

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