40' racing trimaran for shorthanded sailing designed by Kurt Hughes

One of my long term projects has been to build a 40' trimaran that is capable of demounting to a high cube container for transport.  Initially I was going to build Kurt's F40 trimaran stock plan but since that time my requirements have evolved somewhat. 

The new design allows for a little more space onboard and has standing room in the main hull.  Displacement at DWL is about 200kgs greater which has necessitated one more inch beam in the main hull and one inch greater depth, worth it we think for the extra payload which is needed to meet the offshore requirements for fuel load and water tankage.  It uses an outboard which is mounted up near the cockpit for easy access.  Length of the main hull has been shortened to 39'4 to allow it to fit into the slightly less stringent Cat 1 requirements for offshore sailing.  All hulls now have reverse bows and the main hull is now going to be foam sandwich rather than cylinder molded to allow for compound curves.  Floats may be cylinder mold or foam sandwich (not settled at the moment).

Rig is going to be a secondhand 18 metre aluminium mast that was salvaged off a Malcolm Tennant Bladerunner 43' catamaran it will be made into a two piece for container transport, sails were salvaged too and are reusable for my trimaran platform.

It's a relatively simple boat overall which should help with it's shorthanded brief.  We have gone with a single deep daggerboard to stay with that theme rather than float lifting foils.  Float rudders are being fitted in addition to the main hull rudder.  A little more complication but helpful if we find ourselves in main hull flying mode.  Float volumes are 200% of displacement so large but not massive. Not shown in the renders is the bow nets and bow rail which are necessary for safety when working the foredeck.

The other concern was budget so we are not going for a full carbon build.  There will however be carbon on the 0 degree axis on the beams which are deflection driven parts and possibly on the 0 degree axis of the floats if we go with cylinder mold construction.  Daggerboard, rudders on the floats and main hull are made to be able to retract for shoal draft and beaching if need be.

Kurt goes into detail on some features of the design in his post on his multihullblog:
http://multihullblog.com/2017/10/40-foot-performance-shorthanded-trimaran-for-owen/

Kurt Hughes, updates to Daysailor 23' trimaran design

From Kurt's Multihull design blog:

http://multihullblog.com/2017/02/23-trimaran-update/

I finally got the first run of modeling the updated 23 daysail trimaran. Version B will have ama rudders and the even hotter version C will have foils. It is a developed plywood/epoxy unit with core vacuum bagged onto the flat surfaces needing that. And carbon fiber where it helps. At around 360 kg lightship weight, it can be built for around $5000 us in construction materials. The connecting beams should be carbon mast sections. The camper version comes next.

Kurt Hughes designed CHS X-19 trimaran, small trimarans blog audio interview with builder John Lange of Charlotte Harbor Sails

From the excellent smalltrimarans blog:

http://smalltrimarans.com/blog/?p=10308

How about an audio interview about the CHS X19 Sport Trimaran — a new sailboat that is about to be built by Charlotte Harbor Sails in Florida? Charlotte Harbor’s proprietor, John Lange, was specifically looking for a boat with its features.
John was able to find just what he was looking for in this model, which is a design by Kurt Hughes. (My short audio interview with John is found below).

http://smalltrimarans.com/blog/?p=10308

 

Kurt Hughes 75' cruising trimaran design

Kurt Hughes still has an interest in designing large trimarans for cruising and the results are certainly impressive.  He has quite a few world cruising trimarans under his belt and the reports from the field on their motion and comfort are very positive.  This is an update from his facebook page on one of his current projects a 75' cruising trimaran.

Kurt Hughes Trikala 19 trimaran design updated and intended to go into production in Asia

Kurt Hughes has released a render of his updated Trikala 19 trimaran that is apparently going to go into production in Asia.

http://multihulldesigns.com/designs_stock/daysail/19_tri.htm

It uses the "monoslip connectives" illustrated on the Trikala 19 page it looks like a good and simple system for a small trimaran. The waterstays come tight as the beam slides out for sailing but you can move the boat around by motor with the floats retracted. The benefits seem to be that you can get the boat narrow for a marina berth without getting growth on or having to antifoul the top of the floats as on a f-boat or occupy extra berth length like a dragonfly. There would be a restriction on overall beam though I imagine due to the length of beam coming through the boat and out the other side when folded but with the width of the main hull deck should not be much of a problem. The diagrams I've seen show just the end of the beam in the tube near the gunnel when deployed at full width as there is not much need for "bury" in the main hull gunwhale thanks to the waterstays taking the bulk of the load.

Here are Kurt's notes on the updated design and the differences to the original. Interesting to see more trimarans under construction in asia the TC627 is the most recent I know of. I'll be curious to see who is taking on the construction of this boat and whether they bought the original molds and decided to give it a bit of a facelift? Good to see more options in the production small trimaran market.

http://multihullblog.com/2013/02/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. It 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."

Kurt Hughes 12' trimaran design

From Kurt Hughes blog

http://multihullblog.com/2012/12/12-tri-available-now/

An interesting 12' sailing trimaran project intended for series production.

you can read more on the design brief here

http://multihulldesigns.com/designs_stock/daysail/dragon12_tri.htm

It was intended for usage at resorts and hotels for beachfront charter.

Kurt Hughes 27' x 27' racing trimaran

Kurt Hughes has been working on a new racing design for "Simmo" in Italy.  It's intended to be a performance focussed design but still have some basic cruising amenities.  It's still under development but looking good so far.

Simmo’s New Boat

We all know simmo from all the amazing videos and stills of sailing his KHSD 24′ tri Muffalo. He has been pushing me to come up with a new, bigger design for a while. Here is is. 27′ x 27′. Demountable carbon beams. Curved lifting foils. Sleeps 2 x 2.