Monocoque cold-molding sailboat

Hello,

I start the construction of a 6.5m sailboat in Epoxy-Yellow Cedar, the web-site is:

www.solalelouna.com (the site is in French)

The construction will be "monocoque" hull and roof in one piece (with continue planking)

Does anybody has experience in such construction or has already heared about it?

Thanks for answers (in simple English please)

David

 

More questions than answers. How thick strip planking? What geometry planking? No fastenings I presume?
I built a 37 ft cedar strip plank boat with 26mm square planking glued and nailed to ribs and together and then epoxy glassed inside and outside.
I had no trouble bending and joining the slightly opened joints as they round the hull. Your tighter radii might be a problem around the deck "joint".

 

Hello Interlude,

Thanks very much for your message
I have given up hope that somebody will made the effort to answer
The planks will be first coat longitudinal +- 5mm to give a strong base and three diagonales of 2mm or 2 diagonal of 3mm
Final thikness should be about 11m
Fastened with stainless staples
For fitting the diagonal planks around the deck joint i will probably bending every plank with hot press before to glue them
I would like to avoid to use fiber glass outside as i'm afraid of "delaminage" (i don't know if it's the right translation from French) after a long period, due to UV radiation and expansion, for example after 20 years...what's your opinion?
It seems nobody has experience with such thing..?

Thanks for answer

 

Hi Jusembo. Your boat looks good. I used Japanese cedar which is very light and the "fibreglass skins" were to strengthen the "composite". Your diagonal planking would be stronger but could still benefit from skins. A fibreglass skin would also ensure a proper barrier to keep worms out and give a stronger surface on deck. Epoxy glassing adheres pretty well to wood as compared to polyester resins, but epoxies must be protected from UV and therefore painted (with a light colour to avoid getting too hot from the sun). Maybe something like 2 diagonal layers of 150 gram twirl instead of the 3rd diagonal wood layer could be considered. Your laminated ribs inside with a glass skin outside would be very strong. Some old epoxy decks I've seen seem to have lasted OK.

 

Thanks for your encouraging

I'm answering on the "Boatbuilding" thread, please follow

http://www.boatdesign.net/forums/showthread.php?p=29927#post29927

David