Category Archives: Trimarans

52′ Tri Hound

I was shown this 52 Mcconaghy trimaran with an interesting hound arrangement. Composite rigging guru John Fanta advises against any hidden composite rigging arrangements.

It also had an oddly large masthead plate and an oddly small and badly chewed up exit for something there in the picture foreground.

Sailing 32 Trimaran

I was just about to splash the 12 foot tri when I got a call from Lloyd Fogg, one of my builders who was at Shilshoe Marina that evening.
They just got sails that day and were  going north with the tide in the morning. One of my 32 foot cruising trimarans.
Could I check everything out? Sure.
A few revisions, but it sails great. Fully instrumented. We were faster than true many times.
Great evening.

40 Foot Performance Shorthanded Trimaran for Owen

Use program:
Shorthanded sailing for both racing and cruising.
Demountable and able to fit into a tallboy container.
This design is the latest update to a design that I did several years ago for Phil Steggall.

It also has several features that I developed while sailing my own F40 Geko. First of these is the addition of an actual cabin from main hull flare. Any time a few people come aboard for a sail, their gear has to go somewhere, The 7 foot wide cabin also allows a canopy to hide under in bad weather. On the much narrower Geko, that space was taken up by winches.
The outboard is mounted beside the cockpit instead of back on the transom. When shorthanding having the motor right there without leaving the cockpit is important. On the Geko an 8 hp outboard would push it to 7 knots in chop and once did 11 knots on flat water.
It has a single board in the main hull. Vertical and aft of the mast a bit. In Marchaj we find that a vertical board has the most even stall characteristics and also less deflection for the span. Fully down, the board is a couple of feet below the cabin top. Downwind the boom can be lifted a couple of feet to reduce board draft. I don’t understand the trimarans that suffer the inefficiency of swept boards.
Board down, the draft is something like 10 feet.
As usual it has 200% buoyancy amas.
Presently the design has ama rudders.

Foils were not chosen as they work best with larger crews.

Construction is strip foam and unidirectional e-glass for the main hull. The amas could be the same or even a combination of developed plywood and carbon fiber.
Beams are core with carbon fiber.
Geometry is virtually square with the width almost a much as the length overall.  Doesn’t that make it wider than a Rapido 60?

37 Trimaran Picture

I just got this picture of one of my 37′ trimaran designs from the old days. It must have been the third or fourth design I ever did. August 1986. Hand drawing days. I’m struck by how good it looks to me at the first telling glance. Cylinder molded plywood epoxy.  I hear that it also may be for sale soon.

Racing 1981

I am doing more scans from the old photos. This is Smoholla the Shaman racing, probably in summer 1981. It would have had the board instead of the keel, but with the old amas still.
Its interesting that we are behind Seafire, a Brown 40, as we won every race that year. Except a second against Limelight at Hoggshead. The mug is the diabolically brilliant Bob Dean.  I’m not sure who the speedy cat on the left is.  Maybe it is Limelight.  This was a scan of an ancient Xerox.  You use what you got; goes for photos and sail wardrobes.