Last summer I discussed with several forummembers my adapted design and making of my homebuilt prindle-15.
We discussed extensively my strong deviated solutions. So here finally I can show you all in a video what drived me to this particular design:
http://www.youtube.com/watch?v=R9dcmhmlk4E
or search for ronaldreeder in youtube
or search for sea 3 helmetcamera

hope to hear from you

Very cool boat! I bet that boat has alot of hours in labor. Looks good!

thanks, About one year hard labour; but now my ageborder for beachcattting is shifted again some years further. So it is worth it!

northsea junkie, what type of foam did you use to core your hulls?

Hi seeker,

I'm sorry for my late answer.

I used PS-25; which is polystyreen foam with a density of 25 gram/liter. In reality it weighs however 22 or 23 gram pro liter. This density delivers with a skin of about 1,5 mm epoxy laminate just a strong enough and stiff enough result.

Per hull there is about 450 liter content which gives about 10 kg foam per hull. Mind you, this is exclusive the wooden inserts (abachi and redcedar) for the points where f.i. bolts had to be fixed etc.

I made onforehand two cutting templates from plywood for cutting the foamblocks in the two directions with a hotwire in the desired shape. The rest was handshaping. Don't forget that the actual asymmetrical hullform was in the three dimensions rather complicated (and in mirror of the other).
In fact there was three months between the building of them and they are not 100% exactly each other mirrorimage. I can feel the difference with sailing.

It stays handwork!

Seeker,

I like to add that the foam I used is socalled expanded polystyreen and not, repeat not the blue or green socalled extruded foam.
The last type has a 100% closed cell structure which is unsuitable for boatconstruction. It sucks no resin when laminating, so the connection between laminate and foam is questionary. Great risk on delamination. (though there tricks to avoid this).
Expanded foam is not 100% closed cell (little balls inflated and sticking together) and therefor sucks some resin when laminating (always give it a wetlayer of resin right before laminating).