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RPM for 1 to 1 Tach Time


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Yes. :D

Too new with plane to have settled in.

But, as installed, there is some RPM that the Tach time equals the actual time.   With mechanical tachs there are standard numbers.  Some of which are not normal cruising RPMS, like 2333. 

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1 hour ago, Pinecone said:

Yes. :D

Too new with plane to have settled in.

But, as installed, there is some RPM that the Tach time equals the actual time.   With mechanical tachs there are standard numbers.  Some of which are not normal cruising RPMS, like 2333. 

The mechanical tachs are limited by the available gear ratios inside. There is no such limitation with electronic tachs.

If I had to guess I would set it to 2400.

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I think the honest thing to do is to set it to the rpm Mooney originally.

I would contact Frank Crawford (Manager Technical Resources at Mooney) fcrawford@mooney.com (830) 792-2920 and he can probably look it up. I’ve found Frank very helpful in the past for documentation questions.

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I already checked there, to try to figure out how the hour meter in the plane worked to record time.

It is driven off the tach at a rate proportional to the RPM.    But even that was hard to find.  The actual RPM for 1 hour tach = 1 hour actual is not in my POH

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