Originally Posted by
TwinHueyMan
Reading through the B2 RFM, under limitations (sn 7253-sub or post SB 60-113 which I believe is the 125% gearbox) there is a note:
NOTE The engine is protected against over-TOT and over-torque by a STOP.
I can’t find any other reference to this, don’t believe it’s the collective pitch stop - does this imply that at TOT limits the engine will stop producing additional power (TOT limiting)? If so, does this mean in an OEI situation you can only expect TOT limits for power and nothing more should the situation be dire?
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.