Re: Illinois: 450 sheets?
> Is this 5.5" bottom a massive plywood lamination?As I recall from studying blow ups of the diagrams in MAIB, the 5
1/2" thickness dimension is the thickness of a full length "shoe"
stiffener extending only partial width along the center of the
bottom, kind of like the shoe/cutwater in Clam Skiff. Inside of the
boat the curve of the bottom is faired out level with athwartship
stringers with a plywood floor. I presume insulation would go
between these stringers.
David Ryan wrote:
Probably on the upper works, doorskin foam doorskin laminate. Seth
Macinko has talked to him about it, and if he is staying current on the
group, he might add more.
HJ
Probably on the upper works, doorskin foam doorskin laminate. Seth
Macinko has talked to him about it, and if he is staying current on the
group, he might add more.
HJ
> FBBB --
>
> I am entertaining escape fantasies and to help fuel them, rereading
> the Illinois write up.
>
> In it Bolger says " If constructed all solid ply as proposed, vs.
> ply-foam-ply laminate in places, she needs on the order of 450 4x8
> sheets of 1/2" plywood."
>
> Where in this beat would ply-foam-ply laminate be used, and to what end?
>
> YIBB,
>
> David
>
> C.E.P.
> 134 West 26th St. 12th Floor
> New York, New York 10001
>http://www.crumblingempire.com
> (212) 247-0296
>
> -
The ply/foam/ply sandwich, if properly constructed, could be almost as
strong in some ways as the equivalent plywood laminate. However, it
would not do as well with local impact loads, and I wonder if it would
waterlog. This says to me places above the waterline that will not be
run into things like docks and rocks. Sounds like deck and house to
me. (I'm not familiar with the design.) Generally, on a structural
member acting as a beam, the material on the outside does most of the
work, though you do have to have some material for shear loads. Hence
I beams and ply/foam/ply sandwich.
strong in some ways as the equivalent plywood laminate. However, it
would not do as well with local impact loads, and I wonder if it would
waterlog. This says to me places above the waterline that will not be
run into things like docks and rocks. Sounds like deck and house to
me. (I'm not familiar with the design.) Generally, on a structural
member acting as a beam, the material on the outside does most of the
work, though you do have to have some material for shear loads. Hence
I beams and ply/foam/ply sandwich.
--- In bolger@y..., David Ryan <david@c...> wrote:
> >> Where in this beat would ply-foam-ply laminate be used, and to
what
> >
> >My guess is that it would be used on exterior skin surfaces, for
> >thermal insulation reasons. But not on the bottom, which is
doubled
> >already with stringers and floor sheathing and presumably would
> >receive some kind of interstitial insulation.
>
snip
>> Where in this beat would ply-foam-ply laminate be used, and to whatI was under the impression that the bottom is considerably more than
>
>My guess is that it would be used on exterior skin surfaces, for
>thermal insulation reasons. But not on the bottom, which is doubled
>already with stringers and floor sheathing and presumably would
>receive some kind of interstitial insulation.
doubled (5 1/2" thick!)
Is this 5.5" bottom a massive plywood lamination?
YIBB,
David
C.E.P.
134 West 26th St. 12th Floor
New York, New York 10001
http://www.crumblingempire.com
(212) 247-0296
> Where in this beat would ply-foam-ply laminate be used, and to whatMy guess is that it would be used on exterior skin surfaces, for
thermal insulation reasons. But not on the bottom, which is doubled
already with stringers and floor sheathing and presumably would
receive some kind of interstitial insulation.
FBBB --
I am entertaining escape fantasies and to help fuel them, rereading
the Illinois write up.
In it Bolger says " If constructed all solid ply as proposed, vs.
ply-foam-ply laminate in places, she needs on the order of 450 4x8
sheets of 1/2" plywood."
Where in this beat would ply-foam-ply laminate be used, and to what end?
YIBB,
David
C.E.P.
134 West 26th St. 12th Floor
New York, New York 10001
http://www.crumblingempire.com
(212) 247-0296
I am entertaining escape fantasies and to help fuel them, rereading
the Illinois write up.
In it Bolger says " If constructed all solid ply as proposed, vs.
ply-foam-ply laminate in places, she needs on the order of 450 4x8
sheets of 1/2" plywood."
Where in this beat would ply-foam-ply laminate be used, and to what end?
YIBB,
David
C.E.P.
134 West 26th St. 12th Floor
New York, New York 10001
http://www.crumblingempire.com
(212) 247-0296