Re: [bolger] Cross planked bottoms
In a message dated 22-07-02 1:29:37 AM E. Australia Standard Time,
jmeddock@...writes:
"After the first one or two boats, I was advising builders to us a thick
plywood bottom that could be sheatherd perfectly tight, the cost saving in
the cross-planked bottom not justifying its irritations".
Howard
[Non-text portions of this message have been removed]
jmeddock@...writes:
> Bolger has drawn a few boats with cross planked bottoms of 1.5X1.5 inchIn his discussion on AS29 in BWAOM, PCB says, refering to Jessie Cooper:
> strips (ala Jessie Cooper)
>
"After the first one or two boats, I was advising builders to us a thick
plywood bottom that could be sheatherd perfectly tight, the cost saving in
the cross-planked bottom not justifying its irritations".
Howard
[Non-text portions of this message have been removed]
Some around here might want to see a couple photos of the keel after
removing it from the mold. I started cleaning up the edges a little
to test how the lead works. My 1 1/2" wood chisel works the lead
nicely. I think the keel is perhaps only 1 1/4" thick versus the
specified 1 1/2". Though, I decided that I can thicken it up by
pouring on 10 pounds of lead at a time, melted on a camp stove.
I am also trying to scheme up a way to measure the weight. I am
afraid it is a little to big to weigh on the bathroom scale [even one
end at a time.]
http://www.hallman.org/bolger/micro/hour24/
I could move it easy enough with the Jerry-Rigged wheels and my hand
truck dolly. It is heavy!
The rest of my day will be devoted to cleaning up the mess before my
wife gets home. :)
removing it from the mold. I started cleaning up the edges a little
to test how the lead works. My 1 1/2" wood chisel works the lead
nicely. I think the keel is perhaps only 1 1/4" thick versus the
specified 1 1/2". Though, I decided that I can thicken it up by
pouring on 10 pounds of lead at a time, melted on a camp stove.
I am also trying to scheme up a way to measure the weight. I am
afraid it is a little to big to weigh on the bathroom scale [even one
end at a time.]
http://www.hallman.org/bolger/micro/hour24/
I could move it easy enough with the Jerry-Rigged wheels and my hand
truck dolly. It is heavy!
The rest of my day will be devoted to cleaning up the mess before my
wife gets home. :)
> Why such narrow strips?I think it has to do with the change in dimension of the lumber as it
absorbs water. If the planks are too wide, the the shear pressure on
the fastenings gets high.
Peter (who is illustrating that he is not afraid to offer opinions
about stuff he has read about but doesn't really know)
Bolger has drawn a few boats with cross planked bottoms of 1.5X1.5 inch
strips (ala Jessie Cooper)
Why such narrow strips? There is not much arc in the bottom of the few
designs I have seen. It would seem
wider would be easier, there must be an advantage I am overlooking.
Are the planks intended to be only edge-nailed and glued and not caulked at
the seams?
going outside to build my EEEK! rudder,
Justin
strips (ala Jessie Cooper)
Why such narrow strips? There is not much arc in the bottom of the few
designs I have seen. It would seem
wider would be easier, there must be an advantage I am overlooking.
Are the planks intended to be only edge-nailed and glued and not caulked at
the seams?
going outside to build my EEEK! rudder,
Justin