Category Archives: Trimarans

Another Sliding Arm Trimaran

I think it was some 20 years ago that I first did my sliding cross tube trimaran design.   Several other people offered suggestions, some of which were included in the design, including the UHMW centerline dropboard.

Many commentators told me that it would never work.  Several have been built since then but nobody has ever filmed one sliding.  If I had any sense I would have built one instead of the Geko.

I did know that some other trimaran designs had started doing sliding tube designs, but I had not seen one.  Finally some video of  a design at

http://www.astusboats.com/   The tube connections to the amas are sketchy and I see no centerline compression resolution method, but.

the video http://www.astusboats.com/transportable-boat/trimaran/astusboats-sailboat.php?id=266&cat=Videos&page=Videos

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and here I go again.  20 years ago or so.

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Video of 37′ Tri

What a nice video, courtesy Jon Reed. I had not seen it before. It is Lance’s 37 tri that I designed back in ’86. Before CADD.  Still looks quite modern and fast to me. Cylinder mold plywood/epoxy.  Lance was professionally building Constant Camber but chose this for his own boat.  Still looks fast for a livaboard cruiser.  And it looks like somebody bought a drone doesn’t it?  https://www.youtube.com/watch?v=nxfZgb5fTEY

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Mystery Trimaran

I got a couple of pictures of what looks like one of my 37′ or even 40′ trimarans, from John who saw it. Located Block Island.

Does anyone know the boat? I first thought it was one of the 37s but it looks a bit bigger overall to me. If it is the 40, there is funny story. It seems that multihull legend Jim Brown went to look at it and its plans while it was being built.  His reported comment was “Hughes is just showing off.”

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“the Making of Sumo” Picture Sequence

I had not before seen this sequence of pictures of the making of Pat LeMehaute’s KHSD 37 trimaran at Islamorada, FL.  The link is only on Face for now so you have to be from there to see it.  Foam/glass.  What an amazing job.

OK I find that none of the Facebook links work.  Will see what I can do to get the sequence here.  Kludge would be to go to Pat’s Face page and find the albumn.1931459_100834349939918_2630693_n

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Andrew’s Tri

While in japan I got to visit Andrew and his KHSD 37 tri. Not many sailors at all in Japan. The locals think he exists for their amusement.  He was hauled out about 15 meters from the sea and maybe 2 meters above it.   When I was there we got word from a fisherman that a typhoon was coming. I see on the news that Kyushu where the boat was got hit square on. Hoping for word and the best for him.  Also found at https://www.flickr.com/photos/96861389@N00/sets/72157626206345542/

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More 32′ Trimaran Runabout

The customer decided on the solid wing version of the trimaran runabout. The solid wing version below.  Microstation stopped being able to do any trim cuts so I can’t put holes in the shell anywhere. I have to get back where I can complain to tech again to find out why the fail.

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32′ Trimaran Runabout

I went rogue on a 32′ power tri runabout design. hope customer likes it. communication difficult on the road here.  Foam/glass.  30 hp gives low 20 knots empty and 45 hp full load.

Tried to make a radical look functional.  Opening doors on each side of cockpit.  Steps are aft to motor.

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