Utility Helicopter 60M (UH-60M) Exam 2 Practice

When a rotorcraft is dealing with a transient demand on a single engine, the engine can surge beyond its steady, continuous limit for a short time. For the UH-60M, that short-term window is a 10-second transient, and the single-engine torque is allowed to be in the range of 135 to 144 percent. This higher range exists because the drivetrain and engine can tolerate a brief overload while responses stabilize, especially in engine-out or rapid power-change situations. The idea is to permit a temporary boost without risking damage, but you must not hold above 144 percent or exceed that envelope for longer than ten seconds, and afterward you return to the normal continuous limit for a single engine.