I was sent a nice picture of my 63′ cruising tri. Foam/glass hulls with carbon beams and mast.
Category Archives: Trimarans
Trikala 19 Trimaran 2013 in “in-position”
I finally got
time to model the Trikala 19 trimaran in the “in-position”. It is less than 8′ wide (2.44m) in that position. And it expands back out in seconds. Building soon in Asia.
Trikala 19 Trimaran Update
The Trikala
19 trimaran has been updated. The original design had a main hull and deck as 2 pieces. The update is a single piece, (well 2 halves) and looks more rounded. It also has X bows to increase speed in waves. I will be built in Asia. It can be made ready to trailer in a few minutes. It can stay on the water in the “in position” indefinitely. I’m sure it will cost less than the same size folder.
Early 37′ Tri
I might have
had a pic or two of this before but I was sent a site that has a lot of them. Would have been ’89 or ’90.
CM construction. It looks good. http://www.flickr.com/photos/96861389@N00/sets/72157626206345542/
12′ Tri Available Now
I just got permission to release this composite 12′ trimaran design to the public. It was designed to go into production in China. Plug on the project got pulled. It has an unstayed mast. Diameter in the model looks a bit large. It could also be roto-molded.
Palmer Johnson Trimaran
I see that Palmer Johnson has a new trimaran mega-yacht. It is 48 meters long. The 1% must be doing very well; it’s all carbon fiber. The design looks very post modern multihull: like Mike Schacht work, to the third power. The amas are just vestiges though; they could not support anything. However, as the guys from NAVSEA once reminded me, those amas could diffuse the thermal signature, protecting it from heat seeking missiles. It really is just a typical portly mega-yacht, albeit in carbon, with amas pasted on.
http://www.boatinternational.com/yacht-features/palmer-johnson-super-sport-48m/
New Passenger Trimaran Design
Ok Ok, this is why I have been kind of underground for a few days. Was rush deadline for the Singapore Asian Cruise Conference. 49 passenger, traditionalesque trimaran for Palawan. Foam/glass construction. Aeroesque rigs for easy handling. 65′ long
, not counting the styling prod and tail.
Another Run at the 17′ Trimaran
The extrusion available to the 17′ beach tri changed so the entire design had to be shifted slightly. I got to meet Thomas in Lavorno, Italy this spring.
The market is to be beachfront hotels.
-at-the-17-trimaran/117tri9psp8g/” rel=”attachment wp-att-1478″>
Pat’s Tri
A nice pic of Pat LeMehaute’s KHSD 37 tri.
It was featured on the weather channel a few years back. Foam/glass.
New Rowing Trimaran
You might recall that my Formula 40 catamaran hull lines held the world record for fastest rowing across the Atlantic last year. For a day. I did not know about the rest of the design, and a lot was wrong. I insisted on being fully involved with the next boat. Crew of 9. Here it is.
Rower 60 Trimaran
Features:
Main hull has L/B of 21:1. Displacement of 4848 lbs. Hull speed is 11 knots. At hull speed it takes under 6 hp to move at that speed. At that speed there is 265 lbs of form drag and 125 lbs of friction drag. Draft is only 12” so change in depth over the trip should not change much, keeping waterline long.
X bow allows less hull area, reduced windage and significantly less wave pitching. See video at http://www.militaryphotos.net/forums/showthread.php?152989-Xbow-Sea-Axe-A-future-in-the-Military-Design.
Next year everybody will have these bows. Flare is high enough above waterline that it should not increase pitching.
Total main hull max height is 6.5’. I say that the governing load will be a wave on each end and the middle in the air. The flare also helps restrain buckling.
Curved openings are much stronger. Upwind I would cover openings with Eisenglass or thin acrylic like man-powered craft record holders do.
Top will have solar panels and flush hatches as needed.
Amas are just under 17’ long and 1000 lbs displacement reserve. I see greatest load being pushed sideways 20’ by a wave. Location aft helps minimize pitching again as it spreads out the centers of buoyancy.
I assume beam should be completely rigid, like in bicycle racing where flexing frame is seen to absorb power.
I see this as having every possible thing done right. I don’t know if 5’ tall above waterline is too much. It does give more beam depth.
—–Original Message—–