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One key to the success of Farrier trimarans is the easy trailerability made possible by the unique Farrier Folding System™.

The Farrier system is the most structurally sound trimaran folding system available, with no hinges in the beams or the critical beam to float join, while corrosion prone wires are never used in structurally critical areas. Overall beam can be varied in seconds, by just one person, anywhere.

After 33 years of use world wide the Farrier System is well proven, the most successful folding system, and used by more trimarans than anything else. So to be safe, be sure to insist on the genuine twin strut 'Farrier Folding System'™. It is significantly different from all the rest, and the many advantages can be summarized as follows:

  • Folds for road legal trailering in minutes without any heavy assembly being required.
  • The twin strut folding system gives absolute control over movement
  • No need for water to support floats while folding - the twin struts make it easy to fold anywhere
  • The correct folding strut geometry means folding can be done by one person, anywhere.
  • Twin struts mean the float will not fall on the ground if folding out of the water on a trailer
  • Absolutely no weak hinge points in the actual beams, with the highly stressed beam to float join being solid
  • Absolutely no sliding parts that can bind or jam
  • Corrosion prone wires are not used in structurally critical areas where sudden failure could threaten the boat
  • The structurally critical lower struts are solid Aluminum 6061 T6 bar, with absolutely no butt welds.
  • Custom made reinforced acetal (plastic) bushes insulate aluminum struts from stainless steel pivot pins
  • There is no reliance on the rig for structural support should float reverse loading occur
  • Beams are structurally sound no matter how loaded, including even after a capsize
  • Proven track record, with 33 years development, six Atlantic crossings and race records/wins world wide.
  • Now used by over 3000 boats world wide

Farrier Folding System™ Demonstration
(see the folding system working)

The Alternatives:

These consist mainly of the 'swing wing' type where the outer hulls swing horizontally back or forwards, but requires multiple hinges in center hull and floats, while accommodation is lost as shown below. The second, and seldom used system, is telescopic beams, which can have major binding problems should any sand or salt get on the sliding surfaces, while accommodation suffers even more.

How horizontally moving floats reduce interior accommodation:

----------- Telescopic beams will cut across accommodation --- --------- Cabin space outboard of this line is lost

The Farrier system instead makes full use of 'free space' that is not being used

A 'Cheaper' Alternative?

Another alternative that has been promoted over the years is a single strut system where the secondary upper folding strut is omitted. However, the resulting boat is very difficult to fold and it will take several people to manhandle the floats in or out. With such a boat, whenever the designer claims it is easy to fold, ask him to actually demonstrate. The actual cost saving in reality is very small, which is far outweighed by a much lower resale value, while any small time saving in building is far outweighed by the years of inconvenience with the difficult to control folding.


Demountables were popular for a while, until owners found just how much work was involved in assembling and disassembling a trailerable trimaran. It takes hours, and is usually impossible to do single-handed.

A demountable being put on the trailer 12 years ago. There is so much work and so many
pieces that owner is soon saying why did I ever get this thing?

The Ultimate:

The F-22, F-32, F-33 and F-39 have now taken it a step further for maximum convenience, with the beams kept completely on the outside of the center hull, as well as being moved higher above the water.

The beams are now completely external on all later designs, as shown on this F-33. This
gives more room inside, and is much cleaner on the exterior, with no hazardous recesses
(foot traps) into deck. There's also no need for awkward covers, which are in the way when
the boat is folded, and easy to break

Sliding or fixed beams will greatly reduce room and convenience

The real thing - instead of beam ends intruding into the cabin, one can have more room and storage.

Being designed primarily for trailering, the only thing the Farrier Folding System™ does not do better than all the others is docking folded in a marina berth when required. A few days is not a problem, but over a long term the part of the float sides in the water will need regular cleaning. However, this, and even anti-fouling altogether, can be avoided simply by using a modern dock lift of some type, or the boat can be left on the trailer in a mast up storage yard.

Smaller trailerables are so easy to trailer or keep in mast up storage, that it makes little sense to keep them in an expensive marina berth. The savings in docking fees alone can help pay for the boat.

Docking folded is no problem for just a few days - F-27 shown.

While a simple dock lift makes it easy for the long term - no anti-fouling needed - F-31 shown

This F-33 in Punta Gorda even survived 2004's Hurricane Charlie on this very lift.
One occasion where an easy to lower mast was a boat saver.

....or just keep it on the trailer

and launching really is as easy as it looks

Farrier Folding System
is a trademark of Farrier Marine, Inc.