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Old 05-08-2011, 12:42   #1
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Bob Perry Design Question

My wife and I are looking at double enders or Bob Perry designs. On vacation this summer we met a couple with a Tayana 37 and we were watching their boat on anchor and noticed that it seems to have more movement then our own. With a rounded stern it seemed like the boat was hobby horsing alot. With a flat stern I would assume that helps to stop the boat in that perticular motion. What do others think?


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Old 05-08-2011, 12:46   #2
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Re: Bob Perry design question

I've never heard that suggested before. I've read that some folks like them because you take on less water when pooped but that otherwise it doesn't make any difference.

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Old 05-08-2011, 12:55   #3
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Re: Bob Perry design question

A double ender IS supposed to be more buoyant in the stern ftom what I've read about them. So it would make some sense.

I may be wrong, I'm no naval engineer.
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Old 05-08-2011, 13:00   #4
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Re: Bob Perry design question

I don't think the shape of the stern would make any difference while at anchor.

Rather the shape of the hull, the type of keel, the amount of scope, the weight of the boat/displacement, and whatever the current/tide conditions were should be considered.

Jf the conditions were rolly then a heavy displacement full keel would ride calmer than a 8,000 lb Bennie.

If there was a strong current running then the full keel would cause more boat movement than a flatter bottom. l
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Old 05-08-2011, 13:09   #5
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Re: Bob Perry design question

ddsailor25, you can read Bob Perry's own words on this forum if you do a search. For example, here's an interesting thread in which he discusses transom shapes and how they derive from the projection of the hull lines well aft to insure a fair hull:

Transom !

There's plenty more like that in the vast CF database. If you'd like some search help, just ask.

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