Corsair Trimaran Folding System

Corsair Trimaran Folding System

Folding and unfolding a Corsair trimaran takes only a few minutes.

With only 4 bolts to remove, it is easily managed by one or two persons and is normally done while afloat. Simply raise (to fold) or press down (to unfold) the inboard end of one cross beam. Only a little force is needed due to the folding system’s carefully balanced geometry and the movement of the float being mostly horizontal.

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STEP 1: Remove Beam Bolts

Remove all four beam bolts, using a spanner or the provided speed wrench. As these are installed firm but not overly tight, this is a simple task requiring minimal physical effort.

STEP 2: Loosen Shroud Tension

If required, ease out some length on the cap shroud. This is made easy by the use of Dyneema shrouds and synthetic lashing. NOTE: smaller models such as the Corsair 760 do not require this step as tension is maintained in both folded and unfolded positions.

STEP 3: Fold

By pulling up on the inboard beam straps the beam will begin to lift as the floats gradually make their way inboard. As the floats are supported, there is very little weight on the beam allowing this process to be easily performed by one or two people.

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The folding system on a Corsair trimaran takes only minutes

The folding system on a Corsair trimaran is easy.
With just 4 bolts to remove, it is easily managed by one person and is normally done while afloat. Simply raise (to fold) or press down (to unfold) the inboard end of one cross beam - meaning it can be done from the safety of the cockpit. Only a little force is needed due to the folding system’s carefully balanced geometry and the movement of the float being mostly horizontal.

The solid aluminum folding struts have absolute control over the motion and prevent flexing or racking. A stainless steel bolt on the inboard end of each beam secures the floats for sailing. Crucially, wingnets remain attached during the folding process - their frictionless fixing tension themselves appropriately. Folding can be done even while motoring.

Folding system on a Corsair trimaran 1

Folding system on a Corsair trimaran 1

Folding system on a Corsair trimaran 2

Folding system on a Corsair trimaran 2

Folding system on a Corsair trimaran 3

Folding system on a Corsair trimaran 3

Folding system on a Corsair trimaran 4

Folding system on a Corsair trimaran 4

Folds in minutes, just 4 bolts to remove.
Solid lower struts provide unparallelled safety and stiffness.

Corsair trimaran expert from 180 Marine Richard Allen training in San Francisco Bay

Corsair trimaran expert from 180 Marine Richard Allen training in San Francisco Bay


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