Search found 15 matches

by Julkkis
Thu Jul 25, 2013 4:19 am
Forum: Builder's Small Boats
Topic: Cheap Canoe from Urethane sheets
Replies: 14
Views: 3189

Re: Cheap Canoe from Urethane sheets

From reading on the website, the foam is polystyrene. Similar to Styrofoam. Allen Actually, yes it seems to be... We just refer to it as urethane. Don't know why :doh: Looking up, i found these: http://www.diabgroup.com/~/media/Files/Products/Core-material-pdf/H%20July%202013%20rev10%20SI.pdf vs. h...
by Julkkis
Fri Jul 19, 2013 2:07 pm
Forum: Builder's Small Boats
Topic: Cheap Canoe from Urethane sheets
Replies: 14
Views: 3189

Re: Cheap Canoe from Urethane sheets

Don't be scared, it will not sink. It will work fine but after a while, you will feel the skin separating from the foam, like blisters. It will not break but get worse over time. You may have a year or two of fun with it. I donated the prototype that we built (the one with blue insulation foam) to ...
by Julkkis
Fri Jul 19, 2013 1:25 pm
Forum: Builder's Small Boats
Topic: Cheap Canoe from Urethane sheets
Replies: 14
Views: 3189

Re: Cheap Canoe from Urethane sheets

jacquesmm wrote:I hope it has more shear strength than what we used.
I tried to look for this on the forums, i would gladly want to see what happened before i step into mine... But if it is sealed it would not sink straight, right? Now i'm getting scared :-)

Juha
by Julkkis
Fri Jul 19, 2013 1:12 pm
Forum: Builder's Small Boats
Topic: Cheap Canoe from Urethane sheets
Replies: 14
Views: 3189

Re: Cheap Canoe from Urethane sheets

Yes, it is easy but it will not last. Even with epoxy, the skin will separate from the core. It is not the epoxy bond that will fail but the foam will break very close to the skin. This is well know: PU has no shear strength. Search our web site and you will see that we did build a HC16 that way. W...
by Julkkis
Fri Jul 19, 2013 3:01 am
Forum: Builder's Small Boats
Topic: Cheap Canoe from Urethane sheets
Replies: 14
Views: 3189

Re: Cheap Canoe from Urethane sheets

Here some more on the building process: The urethane sheets were 2500mm * 600mm * 20mm. So it took 4 sheets in total. I measured and cut one sheet that i then transferred to rest of the three sheets. I used just a carpet knife for cutting. I preassembled everything to shape and used urethane foam to...
by Julkkis
Fri Jul 19, 2013 2:33 am
Forum: Builder's Small Boats
Topic: Cheap Canoe from Urethane sheets
Replies: 14
Views: 3189

Cheap Canoe from Urethane sheets

Hi everyone! It sure has been a while. I built an FS14 5 or so years back(still running :D ). Since then i have been tackling on building a 21 footer from old seventies plans in stick & glue style. Now as a side project i built a cheap canoe, from construction quality urethane sheets :-D. Sheets are...
by Julkkis
Mon Jul 26, 2010 6:11 am
Forum: Questions before purchasing the plans and announcements..
Topic: Debit card
Replies: 3
Views: 585

Debit card

Hello!

I am thinking on starting my next boat project (FS14 getting to feel too small), and was just wondering; can i pay the plans with a Visa Debit card?
by Julkkis
Sat Aug 22, 2009 11:31 am
Forum: Builder's Small Boats
Topic: My FS14
Replies: 13
Views: 5622

Re: My FS14

Update; Did another trip nearby the island in that photo before last weekend; spent the night there with two other guys camping, and... The wind picked up, bad. 16-20 m/s on the sea and the three of us with all the gear couldn't get the boat up on plane even underway. During the night the anchor rop...
by Julkkis
Sat Aug 01, 2009 3:48 pm
Forum: Builder's Small Boats
Topic: My FS14
Replies: 13
Views: 5622

Re: My FS14

Hello! It certainly has been a while, but she is finally splashed! Great boat it turned out to be, not as fast as i expected but works great. With a 20HP 1975 Evinrude i get 35 KPH with two people and fishing gear... Really stable and planes smoothly. In chop it splashes a bit if not going full thro...
by Julkkis
Wed Sep 03, 2008 3:30 am
Forum: Questions before purchasing the plans and announcements..
Topic: Down East Cruiser 25 photos?
Replies: 6
Views: 1942

REPORT!!!

Moi,

Be sure to report back here on your progress, I am 99% sure that DE25cabin is going to be my next Boat. In west coast Finland, Pori...



Juha 8)