Subject: Re: baidarka Baidarka constuction skin & frame
From: James Mitchell (mariner@seanet.com)
Date: Wed Jan 24 2001 - 22:53:26 EST
Can we heat shrink teenagers?
----- Original Message -----
From: "Bill Low" <billow@capecod.net>
To: <baidarka@lists.intelenet.net>
Sent: Wednesday, January 24, 2001 5:39 AM
Subject: baidarka Baidarka constuction skin & frame
> In response to Robert Neuton's questions about skin boat construction.
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> Having built a number of boats using polyester skin I can say that it is
much
> more stable than nylon. It does heat shrink about 1% and is not effected
by
> temperature or humidity. My process is to coat the skin with two coats of
> exterior urethane and then coat the bottom with Gaco Aliphatic Urethane. I
> find this to be a tough puncture resistant combination. It also gives a
> translucent look which I value.
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> There is no doubt that polyester is more difficult to sew. Nylon has a
> wonderful hand. It stretches easily and conforms to the compound curves of
the
> hull better. Polyester does not stretch much but it is very strong and
almost
> impossible to have a thread pullout. There are techniques which reduce all
of
> the negative sewing problems to a manageable level. I use the 13 oz
material
> supplied by George Dyson. I have tried the lighter weight material and
don't
> recommend it.
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> To give you some idea of the weight of the boats using the above
technique.
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> Baidarks hull: 16' - 24# 18' - 29#
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> Greenland 17' - 25#
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> I think that building a complete frame of ask is a bit of overkill. I use
ash
> in the ribs, deckbeams and cockpit where it is appropriate. The
longitudinal
> members are made of laminated spruce. This combination is strong and
light.
> Some of my boats have been built for people up to 300 pounds using this
wood
> combination without any problems.
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> Bob if you are interested is seeing what I build I'm located on Cape Cod.
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> Bill Low
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> billow@capecod.net
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