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Old 20th Oct 2011, 07:25
  #72 (permalink)  
ashfaq.ghori
 
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Target Torque

Hi,

I just want to know what is Target Torque; and how to apply in real world.

As per RFM 412
TARGET TORQUE: Available 2½ minute OEl torque of minimum specification engine, assured by satisfactory completion of power assurance check.

As per Charts at sea level 23 degree C target torque is 73% for PT6T-3D/DE/DF

Now just a case that during takeoff Mast Torque used is between 75-81 or ever more as Twin Engine Operation. To be most unlucky OEI occur, so other engine take over. So Eng Torque will be same as Mast Torque (say at that time mast torque is 80), So Eng Torque = 80.

Now Torque is past the 73% that mean Target Torque limit (OEI) are crossed.

In real world 412 will never come to hover with max allowed weight at 73%

So I think I am missing something. Pls correct and help me in building better understanding.

Regards
Ashfaq
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