What is the N_1 range on the ground at idle?

The N_1 range on the ground at idle is critical for ensuring proper engine performance and preventing potential damage during operations. The correct range, which is between 60% to 61%, reflects the minimum and maximum N_1 values that should be observed to confirm that the engine is functioning within its optimal parameters while on the ground at idle.

At this idle range, the engine should be stable, and any deviations outside this range can indicate issues such as fuel system malfunctions, control system errors, or other factors that could compromise engine performance. Monitoring N_1 during ground operations is vital for flight safety, as it ensures engine readiness and reliability before takeoff.

Understanding this specific range helps pilots quickly identify abnormal conditions and take appropriate actions as necessary to maintain safety and operational integrity.