Torque Meter Calibration (Reading Low)

[Ramsay]

The torque meter appears to read low compared the the calibration chart in ADA125667.

 

 

It seems the gauge in DCS has been calibrated such the 1400 hp = 50 psi while the chart shows the correct figure as 1400 hp =60 psi

 

~1400 hp (1100 ft-lb@6600rpm) output = 60 psi = Military Power with 30 minute limit.

~1100 hp (900 ft-lb@6600rpm) = 50 psi = maximum continuous power

 

 

Example:

Horse Power HP = Torque (ft-lb) * RPM / 5252 = 1100 ft-lb * 6600 rpm / 5252 = 13,820 hp

 

Testing the UH-1H in 1.5.8 (Batumi, 35°C OAT, 500 ft, 7700lb GW)

 

N1 = 96% = ~30 psi

 

while according to the test data in ADA125667

 

96% N1 = ~ 1000 hp = ~800 ft-lb @ 6600 rpm = ~43 psi, the expected max torque from the flight manual, page 280, figure 7.1-2 for the given OAT and altitude.

 

Note: IIRC there was some discussion about the torque meter psi reading when the DCS UH-1H was first released, but I forget the exact details or what resolution (if any) there was.

 

Other Ref:

Gas Producer N1 and Output Power Chart from ADA125667

Torque Meter Readings psi to in-lb, T53-L-13B, TM 55-2840-229-23-1

Edited December 10, 2017 by Ramsay
Add torque meter limits TM 55-2840-229-23-1

[Guest]

Yes, the huey is still very unrealistic in FM and engine model.