motorboat 17'

Forum for www.boatplans.dk. Guests welcome to post!
Post Reply
rapala59
Posts: 1
Joined: Wed Nov 01, 2006 12:36 pm

motorboat 17'

Post by rapala59 »

There are no holes in the cockpit for preventing the sea water/rain from getting stuck. How can i solve the issue?
Is it possible to arrange a sort of "double layer" on the cockpit (over the water line) with some holes that can help draining the water?
Can i use instead of the 9mm plywood the 10mm one? (In Italy we have 10mm or 8mm plywood).

Best regards.
hairymick
Design Reviewer
Posts: 1965
Joined: Wed Jan 04, 2006 8:54 am
Type of boat I like: <-- Please read instructions to the left and delete this text. Then, tell us what type boat you like! :-)
Location: Queensland, Australia
Contact:

Post by hairymick »

Hi Rapala 59,

Welcome aboard mate.

For what my opinion is worth, 10mm ply would be fine :D
Regards,
Mick

JEMWATERCRAFT Swampgirl; Wadefish;Touring Pirogue;South Wind; P5 ;
Laker X 2, Sasquatch 16.5 T-V 15 Okwata 15:
Cobia 15 (under construction)
jem
Site Admin
Posts: 4915
Joined: Fri Jun 18, 2004 8:14 pm
Type of boat I like: Wooden
Location: Greensboro, NC
Contact:

Post by jem »

Going a little thicker is generally ok.

Morten will, of course, have the final say.
-Matt. Designer.
Boatplans.dk
Design Reviewer
Posts: 143
Joined: Tue Dec 21, 2004 7:55 am
Type of boat I like: <-- Please read instructions to the left and delete this text. Then, tell us what type boat you like! :-)
Location: Denmark
Contact:

Post by Boatplans.dk »

The design of the cockpit is done with the bottom being used as sole in the cockpit. This is done to keep the boat as simple as possible. There can be said both for and against this solution but if you use that you will have to bale the cockpit manually.

Installing a sole in the cockpit above the waterline will give you the possibility to make drain holes. Another possibility is to make a pumping well where you can install a manual or automatic pump. Either of the solutions will work fine, only thing to have in mind is that if you use drain holes the sole has to be above the waterline no matter how much you load the boat.

I have checked the calculations and you will have to use 10 mm plywood, 8 mm will not be enough for this design.
Morten Olesen - Boatplans.dk
Website: http://www.boatplans.dk/
Blog: http://BoatBuildingArticles.com/

Check out my author page at Amazon and browse for boat building books: http://www.boatplans.dk/news.asp?news=amazon
jem
Site Admin
Posts: 4915
Joined: Fri Jun 18, 2004 8:14 pm
Type of boat I like: Wooden
Location: Greensboro, NC
Contact:

Post by jem »

Will installing a sole have a dramatic effect on the crafts stability?
-Matt. Designer.
Boatplans.dk
Design Reviewer
Posts: 143
Joined: Tue Dec 21, 2004 7:55 am
Type of boat I like: <-- Please read instructions to the left and delete this text. Then, tell us what type boat you like! :-)
Location: Denmark
Contact:

Post by Boatplans.dk »

No not really, this boat has plenty of stability for such small vertical change in the centre of gravity. If you raised the sole to deck level and placed a lot of people there it would be a problem, but raising the sole 300 mm [12"] above the bottom will mean no harm to the stability.
Morten Olesen - Boatplans.dk
Website: http://www.boatplans.dk/
Blog: http://BoatBuildingArticles.com/

Check out my author page at Amazon and browse for boat building books: http://www.boatplans.dk/news.asp?news=amazon
Post Reply