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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Fat ass transoms
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Topic Review (Newest First)
12-29-2004 05:15 AM
Denr
Fat ass transoms

I think this comment was way over the top and want you to know that I really enjoyed it!
12-27-2004 11:23 PM
starcresttoo
Fat ass transoms

My girlfriend has a fat ass transom and she has no problem blowing to weather at all
12-20-2004 03:41 AM
ct
Fat ass transoms

Jeff,

I think you are pretty much correct, as always.

In discussing this very subject with a very well known Canadian Ship designer, he pointed out that my 53'' cutter with a flat buttocks aft, would have superior performance on all points of sail, particularly offwind.

Your concern with the bow was also discussed and he seems to agree with you and carefully attends to the bow design to prevent "digging in".
12-19-2004 01:35 PM
windship
Fat ass transoms

Woosh and Jeff,
Thank you for your responses.
So... an aft section that is shaped like a cresent moon is more desirable for performance to weather than an aft section shaped like say, a wide ''U''?

Dennis
12-19-2004 12:08 PM
Jeff_H
Fat ass transoms

Not all broad transomed boats are designed alike. If properly designed, so that there was a minimal increase in drag and so that there was a minimal change in underbody shape when heeled and if sailed comparatively flat, then the additional width aft, combined with moving the longitudinal center of buoyancy aft can result in a finer bow and a more powerful stern section which in turn would result better windward performance.

But if designed so that the hull shape changed rapidly with heel angle, and a change in trim so that the bow was forced down, or was coupled with a full bow and a lot of flare, or was coupled with extreme beam throughout the length of the boat, then a broad transom could really hurt windward performance.

Jeff
12-19-2004 09:03 AM
WHOOSH
Fat ass transoms

A wide transom doesn''t necessarily dictate the underwater hull form but, as the boat heels, it''s probably a reasonable generalization to say that the waterplane of the hull becomes increasingly asymetrical. IOW the intersection of the hull with the water increases at a proportionally greater rate back aft than it does up forward. This is going to generate increasing weather helm...at just about the same time that your sail plan does so, as well.

Jack
12-19-2004 08:05 AM
windship
Fat ass transoms

Do they hurt when going to weather??

 
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