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Posted (edited)

I know the topic has been discussed dozens of times!

But I can’t seem to find a definitive answer on operating RPM limitation for my particular aircraft 1962 M20C

The POH that came with the aircraft looks brand new and I think it’s a generic POH for multiple years?

It shows no restriction?

Edited by Brian2034
Posted
1 hour ago, Brian2034 said:

The POH that came with the aircraft looks brand new and I think it’s a generic POH for multiple years?

Is it the booklet POH (see pic)?  Mooney produced an ‘Owner’s Manual’ to provide additional information lacking in the POH that came with the aircraft when delivered.  You should have a POH that’s on 8.5 x 11 typing paper.  It will have your serial number on it and factory weight and balance data with as-delivered optional equipment.  At least, that’s what I have for a POH on my ‘63C.

image.png.6e2c0587173f78c8411bec7799f9f3f7.png

Posted

By the way, Pilot's Operating Handbooks did not exist before GAMA issued it's specification 1 in 1975. Earlier documents were operating manuals, operating instructions, owner's manuals or whatever the manufacturer wanted to call them and varied in information content.

  • Like 3
Posted

Also, if you’re airplane has a different prop stc, that could have a different yellow arc restriction.  What prop do you have?

  • Like 4
Posted
7 hours ago, Ragsf15e said:

Also, if you’re airplane has a different prop stc, that could have a different yellow arc restriction.  What prop do you have?

This is relevant. 

Posted
13 hours ago, Ragsf15e said:

Also, if you’re airplane has a different prop stc, that could have a different yellow arc restriction.  What prop do you have?

Indeed and those installations should come with revisions to the limitations section of the operating manual/POH as well as a placard for the tach with a revised yellow/red arc.

Posted
1 hour ago, Shadrach said:

. . . a placard for the tach with a revised yellow/red arch.

I have a small placard, but there's no Yellow for my Hartzell 3-blade.

20240511_085115.jpg

Posted
13 minutes ago, Hank said:

I have a small placard, but there's no Yellow for my Hartzell 3-blade.

20240511_085115.jpg

Nope...I's clearly read just like the one in my plane running  two blade Hartzell on your arc is narrower.

Posted
1 hour ago, Shadrach said:

Nope...I's clearly read just like the one in my plane running  two blade Hartzell on your arc is narrower.

That's likely C vs F engines rather than the props.

My Airspeed Indicator has a yellow stripe from 175-200 mph, though. 

Posted
17 minutes ago, Hank said:

That's likely C vs F engines rather than the props.

My Airspeed Indicator has a yellow stripe from 175-200 mph, though. 

My arc changes if I change props. Some will eliminate the arc all together.

  • Like 2
Posted
On 5/16/2024 at 4:00 PM, Shadrach said:

My arc changes if I change props. Some will eliminate the arc all together.

Okay

The prop  is  a HC-C2YK-1BF two blade on a O-360-A1B

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