Originally Posted by
wrench1
The only engine limiting I recall was via the FCU topping stop. And yes, once that stop was contacted the rotor would droop as the engine(s) were "topped out" power wise. I believe the engine maintained the same the same speed/temp limits but the SB you mentioned allowed 125% max torque vs the previous 100% TQ.
Interesting that it could limit the TOT with any reliability not being computer controlled… I also wonder what the actual TOT limit is at? Is it the 2.5sec OEI limit? The transient limit?
I wish it was more clearly articulated that if things go bad you more than likely will not have the 125% OEI torque available if you’re up at even a bit of altitude and that the engine will protect itself all the way to a smoking hole in the ground. Blackhawks have temp limiting (electronically controlled) and it’s warned all over the flight manual as well as clearly predicted with a torque available chart.