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Re: S&G: untaping butt joints
By:Mike Hanks
Date: 9/28/2002, 9:16 pm
In Response To: Re: S&G: untaping butt joints (Keith Marsh)

: You might be right... Just an opinion. I'm not an engineeer, but I think
: that the two types of joints have different forces on them (longitudal
: versus lateral?). I tried to think this through to the extreme to see if
: it make sense... Let's say there is virtually NO glue holding the stripper
: together (and no glass cloth)... literally a bundle of sticks held
: together only at bow and stern with a couple of bulkheads to hold the
: volume. It would stay together. Now if I cut four to six inch seams down
: the middle of the strips, I think it'd act a little different. On a Pygmy
: Coho, all 8 hull strips have the butt joints aligned in a continuous line
: from shear to shear. I were being pitched from trough to trough in rough
: seas, I think I'd appreciate some tape there. All speculation on my
: part,though. I'm still new at this.

Kieth,

I do understand what you are saying, but the epoxy that fills the joint, and wicks up into the end grain, is stronger than the wood. I think the bigger concern would be landing on a rock right at the joint, but I am not advocating removing the glass tape on the inside, which is where you will want the extra strength. If strength is still a concern, add more glass to the inside at the joint.

As I have said before, my next S&G will probably have spline joints, avoiding the whole problem. I have also used butt blocks (1/8" plywood) on the inside. I have not had flat spots develop from any of these methods.

I am not fond of the light areas at the taped joints. I built it fairly fast (6 weeks) in a basement, away from the windows. I believe the light areas are from not presanding before butt-joining the panels. The sanded plywood may absorb more epoxy causing a darker appearance over the rest of the hull leaving light spots at the tape.

Mike

Messages In This Thread

S&G: Pigmy butt joints
Jeff The Tall -- 9/26/2002, 4:21 pm
Re:Butt splice
Don -- 9/27/2002, 10:06 pm
Re: S&G: Pigmy butt joints
Greg Morse -- 9/26/2002, 11:56 pm
Re: S&G: Pigmy butt joints
Shawn Servoss -- 9/26/2002, 7:48 pm
Re: S&G: Pigmy butt joints
LeeG -- 9/27/2002, 8:10 pm
Re: S&G: Pigmy butt joints
Shawn Servoss -- 9/27/2002, 8:45 pm
Re: S&G: Pigmy butt joints
Jeff H -- 9/26/2002, 7:17 pm
Re: S&G: Pigmy butt joints
Scott Baxter -- 9/26/2002, 7:08 pm
Re: S&G: Pigmy butt joints
Keith Marsh -- 9/27/2002, 5:00 pm
Re: S&G: untaping butt joints
Mike Hanks -- 9/27/2002, 5:47 pm
Re: S&G: untaping butt joints
Keith Marsh -- 9/28/2002, 8:55 pm
Re: S&G: untaping butt joints
Mike Hanks -- 9/28/2002, 9:16 pm
Re: S&G: untaping butt joints
Keith Marsh -- 9/28/2002, 9:30 pm
Re: S&G: No Taping Butt-Joints *Pic*
Rehd -- 9/29/2002, 12:03 am
Re: S&G: Pigmy butt joints
Jeff The Tall -- 9/27/2002, 5:32 pm
Re: S&G: Pigmy butt joints
Keith Marsh -- 9/28/2002, 8:29 pm
Re: S&G: Pigmy butt joints
Jeff The Tall -- 9/26/2002, 8:02 pm
Re: S&G: Pigmy butt joints
Myrl Tanton -- 9/26/2002, 6:43 pm
Re: S&G: Pigmy butt joints
Jeff The Tall -- 9/26/2002, 7:45 pm
Re: S&G: Pigmy butt joints
Mike Hanks -- 9/26/2002, 11:22 pm
Re: S&G: Pigmy butt joints
Shawn Baker -- 9/27/2002, 11:25 am
Re: S&G: Pigmy butt joints
Mike Hanks -- 9/28/2002, 8:04 pm
Re:Good Selling Point
Rehd -- 9/28/2002, 8:35 pm
Re:Blade *Pic*
Mike Hanks -- 9/28/2002, 8:57 pm
Re:Blade
Rehd -- 9/28/2002, 11:31 pm