Subject: [baidarka] 'Lofting' and surveying and peripheral subjects
From: Wayne Steffens (wsteffen@skypoint.com)
Date: Wed Mar 27 2002 - 22:43:03 EST
----- Original Message -----
From: "Philip A Jacobs (jaco0253@jaco0253.email.umn.edu)"
<jaco0253@gold.tc.umn.edu>
To: <baidarka@paddlewise.net>
Sent: Monday, March 18, 2002 4:04 PM
Subject: [baidarka] 'Lofting'
> Can anyone recommend a good, clear book on lofting the lines of an
> existing kayak or canoe? I.e. taking measurements from an existing boat
> in order to make either study plans or building forms.
I know nothing about what is "good" or "clear" (or even "lofting"), but
there is some info on kayak surveying in 2 of John Brand's Little Kayak
Books, and a useful blurb in Qajaq on using heavy solder for taking
x-sections. Between the two of them you should have a good start. LKB are
unavailable, but I have them if you need those sections.
I would also like to know more about this, as much as possible, as I intend
to find myself in the presence of an as-yet unsurveyed Inuit kayak or two in
the coming months. If you got any good off-list replies (which is where all
the replies seem to be going these days), please pass them on.
I would like to reverse the question. What is the best way to take lines and
measurements off a piece of paper and put them where they belong, ie back
into a boat? I'm at the critical point where the hull-making begins. I dont
mind the few inconsequential mistakes I've made on the upper frame, but i do
want a hull thats as near to the drawings of the original as possible,
without too much extra work. I want the x-section and rocker to be
reasonably close. I could just eyeball things against the life-size x-sect
drawings I have, I suppose, or i could even make a few forms from them
(though I'd prefer not). Do people actually use offset tables (which I dont
have, but could make from the drawings)? My quest for perfection is over,
but I do want to do the original justice by making a reasonable facsimile.
Jumping back to existing kayaks-does anybody (Harvey? David Z? Wolf?) know
what the current wisdom is on long-term storage of frame kayaks, or kayak
frames? I'm primarily concerned about frame deformation-should kayaks be
supported rightside-up, upside down, with solid supports (how many; where)
or be suspended with straps (how many, where, etc) or...?
Wayne (whose starting to think about kayak No 3 again....)
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