TM 55-1510-221-MTF
NOTE
Aircraft performance is based on obtaining
at least chart torque. Any engine must be
able to meet the chart torque value without
exceeding the TGT of 730°C
6.
Allow conditions to stabilize for one minute then record the
following for each engine being tested.
*a.
Airspeed
*b.
Pressure altitude
*c.
Free air temperature
*d.
Propeller RPM
*e.
Torque
*f.
N1
*g.
TGT
7.
Repeat for opposite engine.
*E.
ENGINE ACCEPTANCE AT MAXIMUM CONTINUOUS
POWER.
NOTE
A new or rebuilt engine operated at the
torque value presented in the cruise power
charts will show a TGT margin below the
maximum cruise limit for the torque value
presented in the charts With ice vanes re-
tracted, cruise torque settings shown on the
cruise power charts should be obtained with-
out exceeding TGT limits
Speed-power runs shall be made in smooth air to determine
consistency with performance figures. Torque settings, fuel flow, and
airspeed to be achieved will be determined by reference to maximum
cruise speed/engine acceptance charts (figure 6). Cruise torque must
be attainable without exceeding the 730°C TGT limit to be acceptable
Indicated fuel flow must be
4-5
