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Re: Catmaran kayak? I have one --- almost *Pic*
By:Carl Delo
Date: 5/27/2008, 11:55 pm
In Response To: Re: Catmaran kayak? I have one --- almost (Bill Hamm)

: Oh yeah, couple of construction things. If you use an epoxy filet at the
: intersection of the stringers and frames you can eliminate the diagonals,
: makes the hull extremely rigid and still very light. Did that one my
: single hull Yost kayak and it's as rigid (sans skin) as any glass boat.

: I was going to make the insides of the hulls completely flat, the two hulls
: are so close together that you'll end up with standing waves that cause
: drag if there is much if any curve in that area of the individual hulls. I
: think you'll still have that problem at a certain speed, only time will
: tell how fast that speed is. If it's fast enough won't matter.

: I was going to make the insides of the two hulls from a piece of think
: plywood, with no curve (or very little) in the hull the fabric cover won't
: have anything to be stretched over to keep it taunt. Still needs covered
: in fabric to keep everything watertight, but then it can be glued to that
: internal ply skin to keep it in place.

: I was going to use only 3 fairly large cross members to hold the hulls
: together. With your sliding seat you'll need more, I was going to put them
: in front of the foot support, behind the seat and under the raised front
: of the seat. I've got some clear sitka spruce that's quite strong for it's
: weight that I'd use for that. Perhaps a light box beam would work there to
: save a little weight (aka airplane spars).

: Bill H.

Bill - we seem to be on the same page about a lot of things. I plan to use full-length plywood on the insides of the hulls, covered with fabric, with lightening holes in the ply (not present on the model). The ply will be straight bow to stern, but with a slight camber in the vertical plane to help tension the fabric and keep the ply straight. I hope the epoxy fillet method works, it will help with the weight. And I do expect to use three beams to connect the hulls, perhaps with a aluminum core if needed - box beams in front and behind the sliding seat, with the dive foil acting as a cross beam at the bow. I'm going to mount the beams above the hulls, not through them as shown below.

Messages In This Thread

Seeking: catmaran kayak?
Bill Hamm -- 5/18/2008, 1:26 am
Re: Seeking: catmaran kayak?
Bill Hamm -- 5/21/2008, 1:43 am
Re: Seeking: catmaran kayak?
Mike Savage -- 5/21/2008, 6:35 am
Re: Seeking: catmaran kayak?
Bill Hamm -- 5/22/2008, 1:25 am
Catmaran kayak? I have one --- almost *LINK*
Carl Delo -- 5/27/2008, 1:30 am
Re: Catmaran kayak? I have one --- almost
Chris Ostlind -- 5/29/2008, 9:11 am
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 5/30/2008, 1:18 pm
Re: Catmaran kayak? I have one --- almost
Carl Delo -- 5/30/2008, 10:23 pm
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 6/1/2008, 2:54 pm
Re: Catmaran kayak? I have one --- almost
Carl Delo -- 6/1/2008, 11:41 pm
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 6/2/2008, 1:53 am
Re: Catmaran kayak? I have one --- almost *LINK*
Carl Delo -- 6/2/2008, 9:36 am
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 6/2/2008, 3:26 pm
Re: Catmaran kayak? I have one --- almost
Carl Delo -- 6/2/2008, 5:43 pm
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 6/2/2008, 5:54 pm
Re: Catmaran kayak? I have one --- almost
Mike Savage -- 6/3/2008, 3:26 pm
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 6/3/2008, 5:55 pm
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 6/3/2008, 3:51 pm
Re: Catmaran kayak? I have one --- almost
Carl Delo -- 6/2/2008, 6:43 pm
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 6/3/2008, 1:58 am
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 6/2/2008, 1:45 am
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 5/30/2008, 11:08 pm
Re: Catmaran kayak? I have one --- almost
Carl Delo -- 5/30/2008, 11:23 am
Re: Catmaran kayak? I have one --- almost------Web
Dan Caouette (CSFW)------WebKitFormBoundaryqtsCtZA -- 5/30/2008, 11:57 am
Re: Catmaran kayak? Floatation
Carl Delo -- 5/30/2008, 10:28 pm
Re: Catmaran kayak? I have one --- almost------Web
Bill Hamm -- 5/30/2008, 1:21 pm
Re: Catmaran kayak? I have one --- almost *LINK*
Dan Caouette (CSFW) -- 5/29/2008, 1:55 pm
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 5/30/2008, 12:02 am
Just Curious.
John Monroe -- 5/29/2008, 4:38 am
Re: Just Curious.
Bill Hamm -- 5/30/2008, 10:46 am
Re: Just Curious.
Carl Delo -- 5/30/2008, 11:32 am
Re: Just Curious.
Bill Hamm -- 5/30/2008, 1:24 pm
Re: Just Curious.
Bill Hamm -- 5/30/2008, 1:08 pm
Re: Just Curious.
Carl Delo -- 5/30/2008, 10:48 pm
Re: Just Curious.
Bill Hamm -- 5/30/2008, 11:06 pm
Re: Just Curious.
Carl Delo -- 5/30/2008, 11:45 pm
Re: Just Curious.
Bill Hamm -- 5/31/2008, 9:24 am
Re: Just Curious.
Mike Savage -- 5/29/2008, 7:09 am
Re: Just Curious.
Bill Hamm -- 5/30/2008, 10:37 am
Re: Just Curious.
Mike Savage -- 5/30/2008, 2:53 pm
Re: Just Curious.
John Monroe -- 5/30/2008, 5:26 am
Re: Just Curious.
Mike Savage -- 5/30/2008, 6:37 am
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 5/28/2008, 1:43 am
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 5/27/2008, 5:37 pm
Re: Catmaran kayak? I have one --- almost *Pic*
Carl Delo -- 5/27/2008, 11:55 pm
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 5/28/2008, 1:43 pm
Re: Catmaran kayak? I have one --- almost
Carl Delo -- 5/29/2008, 12:28 am
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 5/28/2008, 1:51 am
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 5/27/2008, 5:27 pm
Re: Catmaran kayak? I have one --- almost
Carl Delo -- 5/27/2008, 6:15 pm
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 5/28/2008, 1:47 am
Re: Catmaran kayak? I have one --- almost
Bill Hamm -- 5/27/2008, 6:32 pm
Re: Catmaran kayak? I have one --- almost
Mike Savage -- 5/27/2008, 7:04 am
Re: Catmaran kayak? I have one --- almost
Carl Delo -- 5/27/2008, 12:03 pm
Re: Seeking: catmaran kayak?
Scott Shurlow -- 5/20/2008, 6:36 am
Re: Seeking: catmaran kayak?
Bill Hamm -- 5/21/2008, 1:22 am
Re: Seeking: catmaran kayak? *Pic*
Tom Yost -- 5/18/2008, 8:05 pm
Re: Seeking: catmaran kayak?
Bill Hamm -- 5/19/2008, 1:28 am
Re: Seeking: catmaran kayak? *Pic*
Tom Yost -- 5/19/2008, 2:02 am
Re: Seeking: catmaran kayak?
Bill Hamm -- 5/20/2008, 1:21 am
Re: Seeking: catmaran kayak? *Pic*
Tom Yost -- 5/20/2008, 2:35 pm
Re: Seeking: catmaran kayak?
Randy Ricchi -- 5/19/2008, 9:34 pm
Re: Seeking: catmaran kayak?
Tom Yost -- 5/20/2008, 2:26 pm
Re: Seeking: catmaran kayak? *Pic*
John Monroe -- 5/18/2008, 4:46 am
Re: Seeking: catmaran kayak?
Bill Hamm -- 5/19/2008, 1:26 am