Re: [Paddlewise] Rollability Hypothosis

From: Bill Hansen <bhansen2_at_twcny.rr.com>
Date: Tue, 4 Jul 2000 16:24:17 -0400
Having been away from the list for a week and not having had time to read
all of the 169 e-mails which arrived during that time, this may not
contribute much to the discussion, but FWIW:

The CLC Cape Charles 17 (17' X 23") I built for my wife a few years ago is
the most
difficult boats I've rolled. A CLC Patuxent 17.5 (17.5' X 21") I built a
year later is moderately easier to roll, but still not easy. Both boats are
hard-chined with lots of flare to
the sides. The Cape Charles has a great deal of initial stability and
excellent secondary stability. The Patuxent has relatively little of either
sort of stability.

A hard-chine Seguin (17' 10" X 22") I built has moderate initial and
secondary stability, is much easier to roll, but still a lot more difficult
than the boats in the next paragraph. I'd class all of these boats as having
relatively deep keel-to-coaming dimensions.

None of these is as easy to roll as a Romany (either length), a VCP Skerray,
which are both round-chine, or a VCP Anas Acuta (hard chine)or Pintail
(round chine). Romanys have very good stability, but are also very easy to
roll.

A hard-chine S&G boat I've just completed, 17' 6" X 22", with
keel-to-coaming depth of 8.5", is almost as easy to roll as the Romanys are.

My very non-scientific impressions: I think cross-sectional profile,
shape(rounded vs hard-chine), width, and depth of the boat contribute a lot
to ease or difficulty orf rolling. Logs are easy to roll. Wide flat planks,
especially big ones, roll
with difficulty. Low-volume boats roll a bit more easily. For those of us
who enjoy doing layback rolls, shallow depth helps.


Bill Hansen
Ithaca NY


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Received on Tue Jul 04 2000 - 14:02:12 PDT

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