[bolger] Marine ply for weight saving
BO>> I admire June
BO>>Bug, but if I built one I would do it with light marine ply so I could
BO>>cartop it easily, and therefore fancier, to justify the ply, probably
BO>This is a trap!
BO>Don't build the Junebug out of marine ply. It'll just make you spend
BO>more time and more money on it than you ought to.
BO>David Ryan
I'd disagree here: one of the =real= justifications for actual marine
ply for the instant boats is the weight saving, if you use something
like gaboon (okoume) which is much lighter than fir, Pacific
maple/meranti, etc. The cartopping weight is not so much a problem for
the car as for the lifter. THe mangrove wood ply or whatever our nymph
is made from makes the back go popopop every time....
OTOH, when I finally get the brick built, I bet it'll be out of Pacific
maple at 50% more weight and 1/3 the price.
Tim & Flying Tadpole
BO>>Bug, but if I built one I would do it with light marine ply so I could
BO>>cartop it easily, and therefore fancier, to justify the ply, probably
BO>This is a trap!
BO>Don't build the Junebug out of marine ply. It'll just make you spend
BO>more time and more money on it than you ought to.
BO>David Ryan
I'd disagree here: one of the =real= justifications for actual marine
ply for the instant boats is the weight saving, if you use something
like gaboon (okoume) which is much lighter than fir, Pacific
maple/meranti, etc. The cartopping weight is not so much a problem for
the car as for the lifter. THe mangrove wood ply or whatever our nymph
is made from makes the back go popopop every time....
OTOH, when I finally get the brick built, I bet it'll be out of Pacific
maple at 50% more weight and 1/3 the price.
Tim & Flying Tadpole
From: "Rafael, Meyer" <Meyer.Rafael@...>
To: "'bolger@egroups.com'" <bolger@egroups.com>
Date sent: Tue, 15 Feb 2000 09:17:15 +0800
Send reply to:bolger@egroups.com
Subject: [bolger] Re: Marine ply for weight saving
If it is, as it cures it continues to expand over several hours, and
tends to bubble out of the joints, and is extremely hard to clean up.
I only tried it once because of this.
Don
To: "'bolger@egroups.com'" <bolger@egroups.com>
Date sent: Tue, 15 Feb 2000 09:17:15 +0800
Send reply to:bolger@egroups.com
Subject: [bolger] Re: Marine ply for weight saving
>Is that polyurethane based adhesive?
> Does anyone have opinions on using PL adhesive instead of epoxy? This sounds
> like it could remove some time consuming epoxy mixing and save cost.....
> --
> Meyer
If it is, as it cures it continues to expand over several hours, and
tends to bubble out of the joints, and is extremely hard to clean up.
I only tried it once because of this.
Don
PL has been used and reported on by several folks. Fritz Funk has used it
extensively, I believe, in his Sneakeasy (Fritz, care to elaborate?). I've
used it in my Windsprint so far, but sparingly; I didn't really read much
about it until I found the best compromise between epoxy's wonderful quality
(gap filling) and the speed which one part polyurethanes bring to the
table-Fiberglass Coatings Inc.'s (www.fgci.com) prethickened Epoxy Superbond
adhesive. This stuff is actually fairly cheap-about $14 for a two pint kit.
It mixes 1-1 and doesn't seem very sensitive to mix ratio, as long as you
get it well mixed. Has just the perfect consistency to spread on a vertical
gunwale and hold until you get the next course in place. And, better yet,
it has a working time of 45 minutes at 70 degrees.
Do I sound like an ad? Yep-the stuff has saved me tons of time and elbow
power over mixing and thickening my own. Can't see why more of the epoxy
purveyors don't offer the pre-mixed stuff-it makes a lot of sense.
Robert & Amy Lundy
St. Petersburg, fla.
robert@...
amy@...
extensively, I believe, in his Sneakeasy (Fritz, care to elaborate?). I've
used it in my Windsprint so far, but sparingly; I didn't really read much
about it until I found the best compromise between epoxy's wonderful quality
(gap filling) and the speed which one part polyurethanes bring to the
table-Fiberglass Coatings Inc.'s (www.fgci.com) prethickened Epoxy Superbond
adhesive. This stuff is actually fairly cheap-about $14 for a two pint kit.
It mixes 1-1 and doesn't seem very sensitive to mix ratio, as long as you
get it well mixed. Has just the perfect consistency to spread on a vertical
gunwale and hold until you get the next course in place. And, better yet,
it has a working time of 45 minutes at 70 degrees.
Do I sound like an ad? Yep-the stuff has saved me tons of time and elbow
power over mixing and thickening my own. Can't see why more of the epoxy
purveyors don't offer the pre-mixed stuff-it makes a lot of sense.
Robert & Amy Lundy
St. Petersburg, fla.
robert@...
amy@...
> -----Original Message-----
> From: Rafael, Meyer [mailto:Meyer.Rafael@...]
> Sent: February 14, 2000 8:17 PM
> To: 'bolger@egroups.com'
> Subject: [bolger] Re: Marine ply for weight saving
>
>
> List;
> Aim for weight distribution control....
> Boat plans often the specify number of sheets of plywood required for the
> boat with the assumption that less is better. When I was bulding my
> Windsprint I was advised by a well-wisher to ignore the plans and use
> heavier plywood on the bottom panel.
> For my next boat I (!) I am planning to use lightweight gaboon ply on the
> sides and some heavy fir type ply on the bottom planks. The bottom stuff
> will be fibre glassed for abrasion resistance etc.
>
> JB looks like a boat that would benefit from this approach. I note that JB
> is shown as the tender for Ataraxia in BWAOM. This is significant
> praise for
> the simple JB.
>
> Does anyone have opinions on using PL adhesive instead of epoxy?
> This sounds
> like it could remove some time consuming epoxy mixing and save cost.....
> --
> Meyer
>
> [in comment to the following..]
> BO>> I admire June Bug, but if I built one I would do it with light marine
> ply
> BO>Don't build the Junebug out of marine ply. It'll just make you spend
> I'd disagree here: one of the =real= justifications for actual marine
>
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>
>
List;
Aim for weight distribution control....
Boat plans often the specify number of sheets of plywood required for the
boat with the assumption that less is better. When I was bulding my
Windsprint I was advised by a well-wisher to ignore the plans and use
heavier plywood on the bottom panel.
For my next boat I (!) I am planning to use lightweight gaboon ply on the
sides and some heavy fir type ply on the bottom planks. The bottom stuff
will be fibre glassed for abrasion resistance etc.
JB looks like a boat that would benefit from this approach. I note that JB
is shown as the tender for Ataraxia in BWAOM. This is significant praise for
the simple JB.
Does anyone have opinions on using PL adhesive instead of epoxy? This sounds
like it could remove some time consuming epoxy mixing and save cost.....
--
Meyer
[in comment to the following..]
BO>> I admire June Bug, but if I built one I would do it with light marine
ply
BO>Don't build the Junebug out of marine ply. It'll just make you spend
I'd disagree here: one of the =real= justifications for actual marine
Aim for weight distribution control....
Boat plans often the specify number of sheets of plywood required for the
boat with the assumption that less is better. When I was bulding my
Windsprint I was advised by a well-wisher to ignore the plans and use
heavier plywood on the bottom panel.
For my next boat I (!) I am planning to use lightweight gaboon ply on the
sides and some heavy fir type ply on the bottom planks. The bottom stuff
will be fibre glassed for abrasion resistance etc.
JB looks like a boat that would benefit from this approach. I note that JB
is shown as the tender for Ataraxia in BWAOM. This is significant praise for
the simple JB.
Does anyone have opinions on using PL adhesive instead of epoxy? This sounds
like it could remove some time consuming epoxy mixing and save cost.....
--
Meyer
[in comment to the following..]
BO>> I admire June Bug, but if I built one I would do it with light marine
ply
BO>Don't build the Junebug out of marine ply. It'll just make you spend
I'd disagree here: one of the =real= justifications for actual marine
>BO>> I admire JuneIf it was only 3 times as expensive! Out here Marine ply is about
>BO>>Bug, but if I built one I would do it with light marine ply so I could
>BO>>cartop it easily, and therefore fancier, to justify the ply, probably
>
>BO>This is a trap!
>BO>Don't build the Junebug out of marine ply. It'll just make you spend
>BO>more time and more money on it than you ought to.
>
>BO>David Ryan
>
>I'd disagree here: one of the =real= justifications for actual marine
>ply for the instant boats is the weight saving, if you use something
>like gaboon (okoume) which is much lighter than fir, Pacific
>maple/meranti, etc. The cartopping weight is not so much a problem for
>the car as for the lifter. THe mangrove wood ply or whatever our nymph
>is made from makes the back go popopop every time....
>
>OTOH, when I finally get the brick built, I bet it'll be out of Pacific
>maple at 50% more weight and 1/3 the price.
$157,000/sheet, maybe more. AC from home despot, $15!
BTW: Beuhler's got a lot of money saving ideas in his book. Probably
worth the price just on potential saving in a small project.
YIBB,
David Ryan
Minister of Information and Culture
Crumbling Empire Productions
(212) 247-0296