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4 Answers

Centrifugal Stop Pin / Anti-Feathering Lock | Picture or Diagram?

Asked by: 4112 views General Aviation

I understand what a centrifugal stop pin / anti-feathering lock in a propeller is, and what is does. However, I cannot find a single picture of it anywhere, like what the actual pin looks like. Does anyone have a picture or diagram that shows what this actually looks like?

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4 Answers



  1. KDS on Sep 30, 2020

    Take a look at the AIRPLANE FLYING HANDBOOK (FAA-H-8083-3B), Chapter 12 around Figure 12-3.

    There is also a video here: https://www.youtube.com/watch?v=tIAfmY42siI

    Beyond that, I’ll borrow a phrase from one of the CFI’s at this site; “Google is our friend.”

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  2. Complex Goat on Sep 30, 2020

    ＠KDS

    1) I know what a constant speed propeller is.
    2) Those references do not provide a picture or diagram of a centrifugal stop pin.
    3) I’m asking on here because I can’t find anything on google.

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  3. KDS on Oct 01, 2020

    Sorry I tried to help you. My apologies.

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  4. Jeff Baum on Oct 02, 2020

    Maybe this is more of what you’re looking for…

    http://aircraftspruce.com/catalog/pdf/13-07569.pdf

    Page 2 has a diagram. And starting at the bottom of Page 2 is a short description.

    You can also find Hartzell “Start Locks” (the same thing) on eBay. There are several different styles of centrifugal/Anti-Feather/Start Locks out there.

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