Temp Limiting - Torque limited
Just a couple of points. The T56/HS prop combo is essentially a Constant Speed installation. The temp limiting mentioned will always (0-90 degrees throttle angle) be active whenever the Temperature Datum Control is not in the Null position. This allows the TD Valve to "take" fuel to limit TIT (Turbine Inlet Temperature). Above Cross-over (above 65 degrees of throttle angle) the TD system can "take" or "put" fuel to Control TIT to that selected by throttle position. As for the propeller blade angle, it will change to maintain 98-102% RPM in the flight range. When Take off thrust is set, blade angle increases to absorb the power and maintain RPM within the limits 98-102%. As the aircraft accelerates the blade angle will increase as required to maintain RPM (This is evidenced by the increase in torque as the aircraft speed increases) Some where it was stated "unless it is a cold day, you may be torque limited". Maybe it is just the way it was written, but the colder the day the more likely to reach the Max permissable torque of 19600 " lbs. I am presuming that what was meant was that, unless it is a cold day, the Max torque may well not be able to be achieved. PS. TCF, you certainly are correct, those big dials are much easier to read and monitor.