30' plywood sharpie

Can you recommend a reference work for the double diagonal plywood planking? I've never done it, or watched it done.

Not having beams to knock my head against in a low cabin does sound tempting, as does being able to hold a pleasing shape on the deck without resorting to board planking.

 

go ceder and diagonal planking maybe
keep it simple keep it cheep
over a temp foam form ?

just an idea

 

Give yourself a break ,it is a simple sharpie , why add all that extra work and expense . Just slice it up the middle and force it into place , the **** will move more than you think. Take a look at parkers boats , keep it simple . Btw if you want diagonal strip ply ,check Parkers book out " The New Cold Molded Boatbuilding " , it is all there , and more.

committees dont build boats , men do .

 

If I think I can get away with laminating two layers of 1/4' ply, that's what I'll probably do. As you say, it's a sharpie. Every time I get tempted to gussy it up, I pull myself up short with that reminder.

But if I do get fancy anywhere, it'll probably be the deck. So I'll look Par's suggestion over seriously.

One other place I might get fancy: I might build up the cabin trunk of redwood planks. Then finish it bright, and do the rest of the boat in a two-tone job that matches the rose vale and cream colors of the heartwood and sapwood....

Thickness-planing, jointing and edge-fastening solid redwood planks would be a fairly straightforward task for me; I have the tools and the skills.

 

Red wood with tunge oil looks great
I'd use a hardening oil before hand and the right Tunge oil
the boiled stuff you will need to sand in order to re-coat each spring
the pure stuff you can just slather on some more and it soaks right in

stuff also swells and shrinks like a banshee so given its a deck house roof and all you might treat each piece individually and then lay it down over some thin ply cause I just cant see it holding water as simple planks up on the roof

might think of an alkali based stain as a hardener
something light so as not to wreck the redwood

cheers
B

 

Norwalk Islands Sharpies Forum, message #381, Mon Aug 25, 2008:

‘‘ .... The 23 and and 26 now have radiused bottoms, and the 29 is to follow. This has gained head room space, we are fiddiling with the coachroof while keeping the dead elegant look to get effective headroom near the closed copmpanionway area, any way. It's nice to stand up and pull your jocks on! .... ’’

The radiused bottom is easy, double diagonal plywood planking over a first layer of planks that are 90° to the keelson, no stringers.

Ask Robert Ayliffe of NIS boats for the build method of the radiused bottomed NIS 23/26/29. A friend of mine got a sketch from Robert that made it clear. But he got it by private mail, so I don't think it's right to publish it here. Maybe you can use the method for your deck and/or roof as well.

Good luck!

Angel

PS
Ask Robert if you can publish the sketch here.

 

It is easy to add a veneer to cabin sides or transom , then the hole boat can be encapsulated . Although I have had no problem with just glassing the outside of ply hulls , I have also seen a lot of busted glass seams on other boats

 

Sharp cat boat.

8M. Ply.
Full headroom

 

This is a " sharpie talk " thread ....who said anything about catboats...can you promote your boat design elsewhere please..?thanks..

 

I didn't make myself clear, I guess. I was talking about doing the cabin sides in redwood, not the top. I would use 2x4 or 2x6 redwood planks planed to 1 1/8" or 1 1/4", and through-bolt them to a deck carlin.

I wasn't thinking of encapsulating anything, unless it would be the double-diagonal plywood strip deck you suggested.

edit: I just checked on Amazon. Looks like Woodenboat has republished Reuel Parker's book, The New Cold-Molded Boatbuilding: From Lofting to Launching, in paperback. It's only $13.57 plus shipping, but I've already blown my budget for books this week. I'll put it on the list for next payday....

 

sounds like my next book purchase
B

 

She is a sharpie; or she is a sharpie?

 

Nope, not a sharpie. No way; nohow. Way too fat.

Interesting-looking design anyway, though.

 

Light Weight Sharpies

 

I take it those are Lightweight Australian Sharpies? I've never seen them in action before; they look like a lot of fun.

A whole different animal from what I'm working on, of course.