Port Isabel Butthead Scow Sloop
I got involved with some friends who want to recreate the historic
scows of the Texas Gulf Coast. I have no intention of building one
of these, I just want to put the data out there in case anyone has
What I have done is scale the original plans down to a boat less
than 14' long (you don't have to register sailboats shorter than
14' in Texas - here in Oregon, the minimum length is 12'.) I took
the resulting drawing and put the data into the Hull
Designer program by Carlson Designs (freeware.) I then took
the results of Hull Designer and put that into a drawing program
to get the cut plan and offsets.
Here's the PIS_2 .HUL file I created. Feel
free to play with it as much as you like.
If you use this cutplan, you will chop up (4) sheets of plywood
and end up with a bare hull, no bulkheads, no seats, no nothing
but bits of the boat that touch the water. The rest is up to you.
I have included (2) sail plans, one a direct scaling from the original
drawing, the other a more sensible plan for a boat that size that
is used for recreation, not commercial activity. Placement of the
sails is up to you - where you put them affects where you put your
lee/center/daggerboard. Read this essay on
Sail Area Math by Jim Michalak, understand it, do the math,
and place your foils appropriately.
These drawings and cutplan are offered for information use only
- I have no idea if it will actually work. Use at your own risk,
and if you have any doubts, don't use them at all.
Offsets in Imperial and Metric, a suggested cut plan, (2) suggested
sail plans (5 sheets, letter sized, PDF format) Butthead
G. Dierking's original line drawing of the Full
Sized Port Isabel Butthead Sloop (~48 x 18, PDF format)
G. Dierking's original line drawing of the
Sail Plan for the PI Butthead Sloop (~48x18, PDF format)
Please remember, something like this is a non-trivial activity.
If you like what you see, please consider making a tax deductible
donation to the Toledo Community Boathouse, c/o Port of Toledo,
PO Box 428, Toledo, OR 97391