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From: Jim Fuller (no email)
Date: Fri Oct 08 2004 - 18:24:46 EDT
Hi Peter & list,
Larry Zeitlin posted a great note on 9/15 providing some good quantitative
info on this subject. This was in response to a list query from Bob Rapasky
also on 9/15. I can forward a copy if you can't find it in the archives.
As I read your post and theirs it occurred to me how to figure the load
surface area for any angle on our particular boats...
Take a picture of the boat at the angle(s) of interest print each out at,
say, 8.5 x 11 in., overlay a sheet of graph paper and count the number of
squares that are filled by the image of the boat. Be sure to include a yard
stick in the pic so that scaling is easy to do...
total # of squares / # of square per sq foot = surface area
...that will give you the square footage of the surface area the force of
the wind loads against. It should be good for a first order of magnitude
calculation. If you don't have a light table handy take a suitable size
picture frame apart, put the picture and graph paper in it and prop it up on
a table with a flash light in back. The really sneaky thing to do would be
print it out on the graph paper... ha!
Capt. Jim Fuller
-----Original Message-----
From:
[mailto:] On Behalf Of
Peter Pisciotta
Sent: Friday, October 08, 2004 6:12 AM
To:
Subject: T&T: Wind force on boat at anchor
Does anyone have a source for determining wind load on
various types/sizes of boats at anchor given various
wind velocities?
Thanks in advance -
Peter
=====
Peter P. Pisciotta
www.SeaSkills.com
1-877-SEA-SKILLS
415-902-8439 (C) _______________________________________________
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