Couple of interesting posts that bought a wry smile to my face.....
It will be the sender on the instument
Thats usually #2 on the engineer 'quick response' to a snag. #1 is 'oh, they all do that........'
where 80% was indicated and aircraft was doing 100%
If ever there was a sign that a pilot skill set has been lost with the takeover of Bell 47's and to a lessor extent 300's, that was it. Whatever happened to using your 'ears' to hear the RPM?
I really cant believe someone could not tell the difference in RPM in that case.
