Boat Building Forum

Find advice on all aspects of building your own kayak, canoe or any lightweight boats

Re: Skin-on-Frame: How long should ribs be
By:Bill Hamm
Date: 12/9/2008, 1:03 am
In Response To: Skin-on-Frame: How long should ribs be (Peter B)

: I am building a SOF using Morris's book. I measured and cut the ribs to
: length using the method he describes in the book. I found however that
: some ribs were just too long and would push the keel stringer up and/or
: would create a tumblehome shape. I trimmed them down so that they fit
: properly. In his book he mentions that I should stick to using the rule
: then adjust the lengths near the ends of the boat to make a smooth
: transition. I concerned that my trimming the ribs by eye may have a
: detrimental effect on the end result and would be prepared to start this
: step over again if I thought it was going to cause me problems. (although
: I don't look forward to doing this). Maybe my initial measuring was off
: (although I did check it twice). At this point they all seem to look
: pretty good and I know that when they are all tied into the keelson and
: stringers it should pull all into line. Should I go back to the drawing
: board on these ribs or continue on?
: Maybe I'm just worrying too much, like a new parent.

Good advice, as per usual, from Mike. I'd suggest also using a couple long battens on the outside of the frames to judge the final shape. These will mimic the stringers which will give the final shape, but they aren't attached just sit on the frames and show you which are unfair and if the shape is what you want.

I also like the Qajaq USA forum for SOF's, specially traditional ones.

Bill H.

Messages In This Thread

Skin-on-Frame: How long should ribs be
Peter B -- 12/8/2008, 2:46 pm
Re: Skin-on-Frame: How long should ribs be
Bill Hamm -- 12/9/2008, 1:03 am
Re: Skin-on-Frame: How long should ribs be
Joy -- 12/11/2008, 8:28 am
Re: Skin-on-Frame: How long should ribs be
Mike Bielski -- 12/8/2008, 5:52 pm
Re: Skin-on-Frame: How long should ribs be
Brian Nystrom -- 12/9/2008, 2:48 pm
Re: Skin-on-Frame: How long should ribs be
Mike Bielski -- 12/10/2008, 1:20 pm
Re: Skin-on-Frame: How long should ribs be
Bill Hamm -- 12/10/2008, 4:15 pm
Re: Skin-on-Frame: How long should ribs be
Peter B -- 12/11/2008, 3:02 pm