All posts by kurt

Intervention

Back on Kauai again in May.  I didn’t get a chance to do an intervention. Keep in mind Buckminster Fuller’s concept of getting the most performances out of a certain amount of materials.  An imaginary blob of foam, glass and epoxy could go many ways.

I don’t know who designed this unit, but the owners could have had a far better daycharter cat, like the Alii Nui. I was told it has the same or more weight than my 65, and carries the same number of passengers. The deep draft, overhanging bow  and heavy rocker tells me that it will pitch like a dog, and require huge engines to move at any speed. And being so narrow and tall, it will roll like crazy in beam on waves. If I could have only made an intervention.

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More of the Other Foiling

I got to visit Jim Betts boatyard last Friday, and also find out the foil story. Richard was right in an earlier note. After they strip plank the plug, instead of spreading resin on the strip and sanding it, they foil it. The foil is squeegied down like laminate would be, then mold release is added.
At first I thought this part was one of the Perry monohulls. Joel had to explain to me that it was the topsides and deck of the stretched 37 that I designed for him. With the reverse bows.  Notice the foiled lower part of the hull in the lowest picture, to the right.

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RIP Ed Dubois

I just read of his passing in Pro Boat. Am I the only person who didn’t know?
I met him at one of the multihull design conferences held in Southampton back in the early 90s. He was a monohull designer who did his first trimaran, a Formula 40 tri, that was faster than any of its competition. I remember him as light hearted and unassuming. Godspeed.

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Mission Statement

Guys, make sure you believe and follow your mission statement before you build the hulls. Once again, the hulls were built before the mission statement was final. This 39′ power cat ferry is now required to have 36 seats and a perfectly flat floor. 3 years ago it was designed on almost no budget for far fewer passengers and no comment on the floor.  It needs 5′ more length to carry the weight.  Two studies on locating the cabin.MODEL7LONG2PSP2G

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Boeing 787

Piece of a 787 hull at Future of Flight. Visited with the kids Saturday. All carbon fiber. Compared to the thousands of rivets on the metal hull, I wondered what took them so long.
Probably if I had taken the Boeing tour I would know, but the stringers looked small compared to the hull thickness.
The hull is too large to co-cure, so the stringers probably help joining the sections. And help with global loads. I doubt if they help much with the pressure vessel.
This is interesting as my builders are facing rapidly increasing core costs, and decreasing shear strength. Stringers and frames are looking more attractive. Is interesting to see what unlimited funds for structure analysis came up with. My builder Terry Neilson uses glass over a pvc pipe half round.

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Different kind of foiling

I just got this picture of Joel’s stretched 37 cruising cat being built up at Betts’ shop.  The plug is covered with aluminum foil prior to applying mold release and laminating inner face. I have not seen this before.  Layups should start in a week or so.  I want to see this.bettshullfoilg

44 Powercat Gets Closer

It looks like my 44 powercat design in Estonia might actually get launched this summer. I see from the wheeled luggage note that it was 6 years ago when I was last there.  Foam/glass.  Steyr hybrid engines.  I will get more reports from the guys.

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