Small Boat Build

If you drill them round you can rubber plug them to protect adjacent compartments from water intrusion from a leak in an adjoining compartment.

 

Planning to be able to plane with a tiny motor, is in the realm of fantasy.

 

I'm looking at these at the moment, we used them alot at kayak manufacture I used to work at.
Nylon Captive Bung Unit Coarse Thread 16mm, $3.50 | Whitworths Marine https://www.whitworths.com.au/bung-unit-coarse

 

My fantasy is currently at 10 knots, one up, unloaded, 3hp.

 

That might require Divine Intervention !

 

Just the ticket. Plan on sealing the core before final installation.

In your SOR you wanted positive bouyancy. Almost any foam glued to the interior especially the sole will work. Even strategically placed fenders would work.

 

I’ll just increase the hopes and dreams ratio when I fill up the tank for it’s maiden voyage

 

I was more thinking this for the transom only. Definitely sealing any holes.
At the moment I’ve got 9 areas I can seal up completely to give the buoyancy. Was looking at a couple of coats of epoxy on the inside then sealing them without foam.
My last boat I used expansion foam and it added a considerable amount of weight, I know there is polystyrene but can’t see the need if they are fully sealed and separated all around the boat.

 

Polystyrene foam is a closed cell foam and won't absorb water. Polyurethane foam will because it is open cell which will result in soggy heavier foam. I used both but epoxy sealed the open face of PU foam in bow area.

 

I realize that your not under their jurisdiction, but the US Coast Guard doesn't allow sealed void space as positive bouyancy. They believe that whatever stupidity caused the need for secondary bouyancy is likely to also disrupt the integrity of the bouyancy chamber.

 

what size vessel does this apply to?

a buoyancy chamber say 5' long by 2 feet square gets to be lotsa foam, or chambers 2' deep, in general, are an awful lot of foam; especially on a pos buoyant boat to start!

 

I really love the use of zip ties for the stitch and glue construction.

Lots of great stuff to admire in your photo album. Thanks.

-Will (Dragonfly)

 

Good point, I’ll have another read through our local rules before I seal anything up, they probably have the same ideas.

 

Thanks Will, I enjoy picking ideas from others builds too!

 

Hoytedows photo clearly illustrates the basis of my comment in post #7.
There’s precious little room left for humans in there, so pushing the transom out to the back of the extension would improve interior space, and actually give a bit more bottom to improve chances of getting up on plane.
Heaven forbid that the pictured craft should take on any water, a slew to one side Causing a cargo shift would most definitely take it down.