Hi,
That makes it a little trickier. Should we assume that the manufacturer is always referring to 'unloaded' RPM as max? If so, how would one know if you weren't using telemetry? I always knew there was a little bit of unloading in the sky, but I'd have never guessed it would be that much. Frankly, it was a little alarming when I saw the telemetry reading. I don't have any reason to doubt the reading, either, because it's matching the on-board tach and a handheld tach for the ground readings.