RE: [bolger] Double Bottom on Martha Jane.
Dear Group,
The double bottom discussion was in high gear just as I was about to attempt
to glue 2 1/4" ACX sheets together as the revised Pointy Skiff plans
suggested as an alternative to a 5 ply 3/8" single sheet. After reading
about a dozen comments from all of you I decided to go with the 5 ply 3/8".
Around here the only 5 ply 3/8" is Doug fir marine at $47.00. No matter. It
was butt strapped, cut and glued/screwed before I could say vacuum bag. I
don't know if there is a similiar trade-off on thicker hulled boats, but the
extra time and grief was not worth it to me. I had to buy two sheets, but
now I have a start on the wood for the next Pointy Skiff bottoms.
So much for my $.015 worth. Your collective opinions and experiences have
been really valuable.
Thanks and I Hope to see some of you in Port Townsend this coming week end.
Jim
The double bottom discussion was in high gear just as I was about to attempt
to glue 2 1/4" ACX sheets together as the revised Pointy Skiff plans
suggested as an alternative to a 5 ply 3/8" single sheet. After reading
about a dozen comments from all of you I decided to go with the 5 ply 3/8".
Around here the only 5 ply 3/8" is Doug fir marine at $47.00. No matter. It
was butt strapped, cut and glued/screwed before I could say vacuum bag. I
don't know if there is a similiar trade-off on thicker hulled boats, but the
extra time and grief was not worth it to me. I had to buy two sheets, but
now I have a start on the wood for the next Pointy Skiff bottoms.
So much for my $.015 worth. Your collective opinions and experiences have
been really valuable.
Thanks and I Hope to see some of you in Port Townsend this coming week end.
Jim
> -----Original Message-----
> From:col_mooney@...
> [mailto:col_mooney@...]
> Sent: Monday, September 04, 2000 2:03 AM
> To:bolger@egroups.com
> Subject: [bolger] Double Bottom on Martha Jane.
>
>
>
>
> Just a quick question that has been bugging me about double
> bottoms, on boats such as Micro, Long Micro, Martha Jane etc. In the
> earlier discussion about doubling the bottom ply someone asked "why
> not just one thicker sheet?" I may have missed the reply if there
> was one.
> I'd planned to double sheet my MJ, as I figured the generous
> offcuts would be useable elsewhere on the boat, which I figured was
> one of Phils reasons. Then I thought I'd be clever and save time,
> glue and maybe money by using one layer of inch thick. Should I or
> should I not use 1 inch sheets to make the bottom? The only possible
> drawbacks I can think of, which may or may not be valid, are:
> 1. The 1" solid piece will not curve around to meet the sides,
> 2. Traditional scarf joints are not suitable.(although on my
> 16ft sailing dory with considerable rocker this method was used - 9ml
> bottom - seems fine)
>
> Are there any other drawbacks I may have missed? Any imput to help
> me solve my dilemma would be appreciated.
>
> Regards,
> Col
>
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
I tried Chuck L.'s trick of drilling larger screw holes and then
using
smaller diameter screws to pull the second piece of wood into place
when springing the keel batten into place on Micro. It worked like a
charm. With the 150 (or so) screw holes I drilled and screwed today
with the keel batten and the two skids, I did not notice any voids
in
the double bottom.
For future Micro builders; working inside the boat, upside down for
all of this is very tiring. Find a friend to help hold the pieces on
center while you drill. My "friend" is 30 lbs of lead bars that
interlock. Even with this it was very tedious.
David Jost "just a few more good weeks of building left in the
Northeast"
using
smaller diameter screws to pull the second piece of wood into place
when springing the keel batten into place on Micro. It worked like a
charm. With the 150 (or so) screw holes I drilled and screwed today
with the keel batten and the two skids, I did not notice any voids
in
the double bottom.
For future Micro builders; working inside the boat, upside down for
all of this is very tiring. Find a friend to help hold the pieces on
center while you drill. My "friend" is 30 lbs of lead bars that
interlock. Even with this it was very tedious.
David Jost "just a few more good weeks of building left in the
Northeast"
> > Peter
Friend of mine has built 2 and likes them. I guess they sail well.
That's about all I know.
That's about all I know.
--- Inbolger@egroups.com, "Peter Vanderwaart" <pvanderw@o...> wrote:
> snip
>
> Another of the boats is the Bolger CarTopper, a very worth design
> that doesn't get much play here. I suppose it looks a little
> complicated.
> snip
> Peter
Most re: the earlier thread on vacuum bagging, I was in a bookstore
over the weekend and noticed a WoodenBoat book "10 Wooden Boats You
Can Build", which is a collection of 10 of the "who to build" series
from the magazine. One is about a John Marples constant camber (tm)
boat named "Gull" which is vacuum bagged. I didn't read the article,
but it is a source if info. I don't know how applicable to a Micro
the info would be.
Another of the boats is the Bolger CarTopper, a very worth design
that doesn't get much play here. I suppose it looks a little
complicated.
I had a little trouble getting www.woodenboat.com to tell me about
the book until I put "10 wooden boats" in the search engine.
Peter
over the weekend and noticed a WoodenBoat book "10 Wooden Boats You
Can Build", which is a collection of 10 of the "who to build" series
from the magazine. One is about a John Marples constant camber (tm)
boat named "Gull" which is vacuum bagged. I didn't read the article,
but it is a source if info. I don't know how applicable to a Micro
the info would be.
Another of the boats is the Bolger CarTopper, a very worth design
that doesn't get much play here. I suppose it looks a little
complicated.
I had a little trouble getting www.woodenboat.com to tell me about
the book until I put "10 wooden boats" in the search engine.
Peter
Just a quick question that has been bugging me about double
bottoms, on boats such as Micro, Long Micro, Martha Jane etc. In the
earlier discussion about doubling the bottom ply someone asked "why
not just one thicker sheet?" I may have missed the reply if there
was one.
I'd planned to double sheet my MJ, as I figured the generous
offcuts would be useable elsewhere on the boat, which I figured was
one of Phils reasons. Then I thought I'd be clever and save time,
glue and maybe money by using one layer of inch thick. Should I or
should I not use 1 inch sheets to make the bottom? The only possible
drawbacks I can think of, which may or may not be valid, are:
1. The 1" solid piece will not curve around to meet the sides,
2. Traditional scarf joints are not suitable.(although on my
16ft sailing dory with considerable rocker this method was used - 9ml
bottom - seems fine)
Are there any other drawbacks I may have missed? Any imput to help
me solve my dilemma would be appreciated.
Regards,
Col
bottoms, on boats such as Micro, Long Micro, Martha Jane etc. In the
earlier discussion about doubling the bottom ply someone asked "why
not just one thicker sheet?" I may have missed the reply if there
was one.
I'd planned to double sheet my MJ, as I figured the generous
offcuts would be useable elsewhere on the boat, which I figured was
one of Phils reasons. Then I thought I'd be clever and save time,
glue and maybe money by using one layer of inch thick. Should I or
should I not use 1 inch sheets to make the bottom? The only possible
drawbacks I can think of, which may or may not be valid, are:
1. The 1" solid piece will not curve around to meet the sides,
2. Traditional scarf joints are not suitable.(although on my
16ft sailing dory with considerable rocker this method was used - 9ml
bottom - seems fine)
Are there any other drawbacks I may have missed? Any imput to help
me solve my dilemma would be appreciated.
Regards,
Col