Limiting MTOW
Barit1, I probably did not articulate my point as well as I might. All I was trying to convey was that the 19600"/lbs limiting torque was often not achievable before reaching the Max permissable Turbine Inlet Temperature, especially on the T56A-11 which from memory was limited to 971 degrees C at Take-off power and 927 degrees C Max Continuous. The T56A-15 however with a higher T.I.T limit could readily reach Max Torque below the limiting T.I.T of 1083 degrees C for Take-off. Of course, achievable Torque for the given ambient conditions and Runway length available, surface type etc all are considered to determine Max Take-off weight allowed. Hope this is clearer.