## 1765Re: Problem in the Lofting

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• Feb 2, 2008
All boat plans that I have ever seen or worked with are dimensioned
in: Feet, Inches, and Eights. That's The Rule !

The last number is ALWAYS in eights of an inch (a 6 would really mean
3/4")

A dimension on the plan such as 8-7-4 would mean the dimension is 8
feet, 7 inches, and 4 eights of an inch long (or 8 feet 7 1/2")

An indication of + after the dimension indicates that the dimension
is 1/16 of an inch longer than indicated. An indication of - after
the dimension indicates that the actual dimension is 1/16 shorter
than indicated.

A dimension on the plan of 8-7-4+ would mean that the actual
dimension is 8 feet, 7 and 9/16 inches long. Conversely a dimension
of 8-7-4- would indicate that the actual dimension is 8 feet, 7 and
7/16 inches long.

I have never seen a boat plan dimensioned in tenths of an inch such
as 3.10 I do not know how much of an addition or a subtration the +
or the - would make in this case.

The builder always has to use a little leeway, common sense, and his
eye. Make everything fair, fit properly, look correct and you should
have a fine craft. The most valuable tool, equipment, or commodity
any boat builder can have at his disposal is experience. That is why
most people recommend that your first building project should be
something small where you can gain both experience and confidence,
such as a dinghy.

I hope this helps.

Duke Wellington

--- In AtkinBoats@yahoogroups.com, Chris Kottaridis <chriskot@...>
wrote:
>
>
> On Thu, 2008-01-31 at 21:38 -0500, Ron Butterfield wrote:
>
> > > with the signal of subtraction (-) for example 2.10Â¹/Â²- or
3.10Â³/Â²+,
>
> the 3/2 seems odd, wouldn't that show up as 3.11 1/2+ ???
>
> Chris Kottaridis (chriskot@...)
>
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