At idle, what is the N1 percentage range on the ground?

The N1 percentage range on the ground at idle in the T-6A is indeed correctly identified as spanning 60 to 61 percent. This range is critical for ensuring optimal engine performance during ground operations, where engine parameters must be carefully monitored to maintain an efficient and safe operation.

Idle performance is particularly essential for ground operations, as it indicates the engine's readiness for various maneuvers such as taxiing or pre-flight checks. Staying within this specified range helps prevent engine stalling or other performance issues that may arise from incorrect idle settings. Other ranges listed either exceed or fall below the operational limits established for ground idle, which are not suitable for engine performance under these conditions. Understanding the precise N1 range is crucial for pilots to ensure proper engine functioning during ground operations.