Rob, thank you for jumping in on this...your explanation is very helpful; can
you elaborate on how those design weights and specs affect the normally used
ratios; SA to displacement; displacement to length, and Ball-Displacement? Are
the "design" numbers used or are the boats weighed? Also, not of importance,
but I would love to know, historically, which boats, or lines you considered as
your competition? Lastly, thank you for for the 37 it is as beautiful today as
when it left your factory in 1985....(as was my 25, 29, and 33)...
Richard
s/v Bushmark4: 1985 C&C 37 CB; Ohio River, Mile 596...buried under snow...
Richard N. Bush Law Offices
2950 Breckenridge Lane, Suite Nine
Louisville, Kentucky 40220-1462
502-584-7255
-----Original Message-----
From: Rob Ball via CnC-List <[email protected]>
To: Donald Kern <[email protected]>; Shawn Wright via CnC-List
<[email protected]>
Cc: Rob Ball <[email protected]>
Sent: Tue, Dec 17, 2019 8:59 am
Subject: Re: Stus-List listed weights
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div.yiv7092277699WordSection1 {} #yiv7092277699 When I, or any other designer,
starts out a project, he makes a decision about what weight the design is aimed
at. Then create a hull shape that has that exact volume. Then the rest of the
design follows suit. Meanwhile, if a company wants to sell any of these, some
specs need to be available so they have something to explain. So, the predicted
displacement number gets set. After that the details of the design are
completed, the structure is planned, the number of coats of varnish are
decided, and anywhere along this path you can see that the original predicted
displacement is totally lost . . . but it’s still out there as the published
number . . . When the first boat is launched, we’re now many months away from
that original prediction, and back then – it’s the first indication of what the
boat actually weighs . . . I feel that much of our success at C&C was the
ability to predict a finished weight and have the boat come out close to that
number. Our competitors often went to the latest hot designer, got a nice
design, that was maybe even a lot lighter than we were doing. Aha – should be
a world beater – right ? But . . . . they didn’t build a boat lighter than we
did and more likely a bit heavier. So – we had a C&C relatively heavy for it’s
size and a competitor’s boat which was designed to be light, but actually
wasn’t. The C&C had a sailplan and stability to match it’s weight, but the
other guys had a boat that was considerably overweight and probably
underpowered as a result. As the years went by, I had a more and more
sophisticated ability, and understanding of what we were doing so I could do a
design, see it built, and have the design and actual be closer and closer. I
really felt (feel) that we outsmarted the rest of the world for a long time.
Of course in our computer age, it’s much easier to design a boat now. You can
do the whole design, do a weight study, and then change the hull shape, keel
weight, or sailplan at the very last minute to match the weight. Rob Ball
C&C 34_______________________________________________
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_______________________________________________
Thanks everyone for supporting this list with your contributions. Each and
every one is greatly appreciated. If you want to support the list - use PayPal
to send contribution -- https://www.paypal.me/stumurray
