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Old 23-10-2014, 14:58   #106
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Join Date: Oct 2010
Location: The boat - New Bern, NC, USA; Us - Kingsport, TN, USA
Boat: 1988 Pacific Seacraft 34
Posts: 694
Re: Chesapeake Bay Anchor Holding Power Test

Quote:
Originally Posted by estarzinger View Post
I did my bollard pull using 25' of dyneema to a piling exactly because I wanted to measure the steady state force and not get a bunch of dynamic noise (and it does look like this scales very roughly linearity).
Three articles on sailboat zero velocity thrusts are:

http://www.propelspecialisten.dk/dow..._test_2008.pdf
Cruising World - Google Books
http://www.flexofold.com/upload_dir/...onthly_low.pdf

(No expert here, just Google and a little time.)

It is interesting how much difference props, transmission ratios, and engines make.

As an aside, I especially liked the measurement of side thrust. Real measured data after listening to a lot of claims about changes in prop walk with changes in props.
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Old 23-10-2014, 16:57   #107
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Re: Chesapeake Bay Anchor Holding Power Test

FYI - A link to PassageMaker's magazine story about the testing:

https://www.dropbox.com/s/lcypucilvz...EAMAN.pdf?dl=0
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