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Now we are getting somewhere
By:David Hanson
Date: 4/26/2002, 11:36 am
In Response To: Re: I would like jump in here (Mike Loriz)

: So is the dacron weakened chemically, or is the skin weakened due to it's
: lessened ability to "give"?

The material is bound by the paint and will not give with the blow. Friedrich Vetterlein did some really good experiments on this subject. Check out his papers published on Nick's site. Section 5. Selecting an adequate covering.

http://www.guillemot-kayaks.com/Building/FlexibleBaidarka/index.htm

: The I beam comparision is questionable on at least one point, IMHO. A typical
: I beam of steel is homogenous, and has the same strength in tension as in
: compression. Wood, on the other hand, is certainly not homogeneous, and is
: substantially stronger in tension than compression. I don't think the core
: of the sandwich (wood) is acting like the web of a steel beam to a great
: degree.

We are talking about two different things here. I meant the kayak stripper is like an I-Beam in that the flanges (glass covering) is supported by the web (wood core) and provide great strength in shear to bending in cantilever or more like the kayak support at each end and bending in the middle such as when we hit a rock. For the material to give, then the shear must relax or the glass must flex with the wood. Otherwise the wood gives and the glass does not so it ruptures or splits. If the glass was not epoxied it would give with the wood, but then how would we hold it to the wood without the epoxy???

Like Andreas says setup the test with like pieces in length but different thickness wood, hardwood vs softwood and checkit out.

By the way, great looking boats, you did a really good job there! I do like the hardwood. My Guillemot S is about 54# with mostly cedar, seat, two hatches, bulkheads. So you did okay on the weight!

Messages In This Thread

Launching: photos?
Mike Loriz -- 4/23/2002, 9:16 pm
Another pic
Mike Loriz -- 4/24/2002, 10:40 am
Newbie contruction review, hardwood difs
Mike Loriz -- 4/24/2002, 2:18 pm
Re: Newbie contruction review, hardwood difs
Sam McFadden -- 4/25/2002, 12:56 am
Re: Newbie contruction review, hardwood difs
Mike Loriz -- 4/25/2002, 9:17 am
Re: Newbie contruction review, hardwood difs
Sam McFadden -- 4/25/2002, 11:27 am
Re: Newbie contruction review, hardwood difs
Andy -- 4/27/2002, 11:09 pm
Re: Newbie contruction review, hardwood difs
Sam McFadden -- 4/28/2002, 9:52 pm
Re: Newbie contruction review, hardwood difs
Mike Loriz -- 4/25/2002, 1:07 pm
Re: Newbie contruction review, hardwood difs
Sam McFadden -- 4/25/2002, 11:39 pm
Re: Newbie contruction review, hardwood difs
Mike Loriz -- 4/26/2002, 10:15 pm
Other species
Sam McFadden -- 4/27/2002, 12:09 pm
Re: Other species
Mike Loriz -- 4/28/2002, 9:10 pm
Re: Other species
Sam McFadden -- 4/28/2002, 9:45 pm
Re: Other species *Pic*
Nick Schade - Guillemot Kayaks -- 4/29/2002, 9:14 am
Re: Other species
Sam McFadden -- 4/29/2002, 5:27 pm
Go with the old wood/canvas canoe model
Paul G. Jacobson -- 4/27/2002, 12:48 am
Re: Go with the old wood/canvas canoe model
Mike Loriz -- 4/28/2002, 8:49 pm
Re: All Wood
Nick Schade - Guillemot Kayaks -- 4/26/2002, 10:06 am
No angels, pins or dancing needed :)
Paul G. Jacobson -- 4/25/2002, 9:10 pm
Re: No angels, pins or dancing needed :)
Mike Loriz -- 4/26/2002, 10:04 pm
Re: No angels, pins or dancing needed :)
Sam McFadden -- 4/25/2002, 11:24 pm
I would like jump in here
David Hanson -- 4/25/2002, 4:51 pm
What about using 1/8" Red Elm for strong strips?
John Monfoe -- 4/26/2002, 7:22 am
Re: What about using 1/8" Red Elm for strong strip
Mike Loriz -- 4/26/2002, 9:42 pm
Re: What about using 1/8" Red Elm for strong strip
John Monfoe -- 4/27/2002, 6:17 am
Re: What about using 1/8" Red Elm for strong strip
David Hanson -- 4/26/2002, 11:44 am
Use both feet :)
Paul G. Jacobson -- 4/25/2002, 9:58 pm
Re: I would like jump in here
Mike Loriz -- 4/25/2002, 9:40 pm
Now we are getting somewhere
David Hanson -- 4/26/2002, 11:36 am
Re: Now we are getting somewhere
Mike Loriz -- 4/26/2002, 9:33 pm
Re: I would like jump in here
Andreas -- 4/26/2002, 10:44 am
Re: I would like jump in here
Mike Loriz -- 4/26/2002, 9:04 pm
Re: The Wood Matters *Pic*
Nick Schade - Guillemot Kayaks -- 4/26/2002, 12:48 pm
Its a bird its a plane its a .....?
!RUSS -- 4/26/2002, 5:34 pm
Re: Its a bird its a plane its a .....? *Pic*
Nick Schade - Guillemot Kayaks -- 4/28/2002, 11:55 am
Re: The Wood Matters - You are right
Andreas -- 4/26/2002, 2:47 pm
Re: Credit *Pic*
Nick Schade - Guillemot Kayaks -- 4/26/2002, 5:16 pm
Re: Credit
Andreas -- 4/26/2002, 6:16 pm
Re: Delamination
Nick Schade - Guillemot Kayaks -- 4/28/2002, 12:41 pm
Re: Delamination
Mike Loriz -- 4/28/2002, 10:43 pm
Re: Delamination
Sam McFadden -- 4/30/2002, 12:08 am
Re: Delamination
Mike Loriz -- 4/30/2002, 12:37 pm
Calculations
Sam McFadden -- 4/26/2002, 12:43 pm
Re: Calculations
Mike Loriz -- 4/26/2002, 9:19 pm
Re: Newbie - Not!
Chip Sandresky -- 4/24/2002, 3:05 pm
Re: Newbie - Not!
Mike Loriz -- 4/24/2002, 7:06 pm
Re: Newbie - Not!
Steve Frederick -- 4/24/2002, 10:22 pm
Re: Newbie - Not!
Mike Loriz -- 4/25/2002, 8:44 am
Re: Launching: photos?
Mike Loriz -- 4/24/2002, 10:35 am
Re: Launching: photos?
Nick Schade - Guillemot Kayaks -- 4/24/2002, 9:35 am
Re: Launching: photos?
Bobby Curtis -- 4/23/2002, 11:14 pm
Re: Launching: photos?
Mike Loriz -- 4/24/2002, 7:00 pm
Doh!!
Sam McFadden -- 4/23/2002, 11:01 pm
Re: Launching: photos?
daren neufeld -- 4/23/2002, 10:29 pm
Great!
Sam McFadden -- 4/23/2002, 10:55 pm
Re: Great!
Mike Loriz -- 4/24/2002, 6:57 pm
Re: Launching: photos?
John Schroeder -- 4/23/2002, 10:17 pm
Re: Launching: photos?
Ronnie -- 4/23/2002, 9:28 pm