SeaCart 26 Sizes Up the Competition

SeaCart 26 OD v.s. Multi 23, Farrier 22R, Corsair 750 Sprint / See large picture in new window

Although the new SeaCart 26 is first and foremost designed as a One Design class it’s interesting to compare this new design with it’s closest counterparts. It’s fair to say that Farrier and Corsair designs have made up the majority of trailable multihull racing fleets around the world since being introduced and becoming popular back in the 80’s. More recently others beginning with the offshore capable SeaCart 30 GP and smaller tris such as the Multi 23 entered the market have gained market share.

Taking a look at the SeaCart 26 (7.64 LOA) compared to three trimarans of similar size, the Multi 23 (6.72m LOA), Farrier 22R (6.96m LOA) and the Corsair 750 Sprint (7.40m LOA). The obvious difference between the SeaCart 26 and these three designs is it’s potential to consistently fly the main hull. The benefit of which is greatly reduced wetted surface/drag resulting in more speed. The other designs limit themselves with floats that lack volume with ‘‘V’’ shaped profiles and fine aft sections and/or floats that are shorter than the main hull in terms of length overall.

Three key design characteristics allow the SeaCart 26 to fly the main hull; a stiff platform; ample volume in the floats; and twin rudders. Having just one rudder on the main hull direct limits hull flying and a known side effect of a single rudder downwind is cavitation at high speed leading to loss of control – potentially hazardous especially in racing situations. Against it’s closest match in terms of overall length, the SeaCart 26 has dramatically more volume (2000kg of displacement) in the floats compared to the Corsair 750 Sprint. In addition to the powerful volume forward, the SeaCart 26 has optional curved foils which are capable of producing up to 400kg of lift.

When comparing the plan views in the drawings above it is also very noticable that the forward beams are set considerably further back on the SeaCart 26. This will reduce the occurance of waves slamming the beam both upwind and down. It can also be seen that the rig is further aft than other designs, this is a trend that has come into modern designs such as the Multi One Design 70, in essence the length of the hulls forward of the rig is greater providing increased stability and providing reserve buoyancy forward. As a result the SeaCart 26 becomes a safer boat and one that is able to be driven harder with reduced risk of burying the leeward bow.

SeaCart 26 OD v.s. SeaCart 30 FCR, SeaCart 30 GP, Ventilo 28 (M2) / See large picture in new window

In our future gallery boat comparison images can be found and drafts of the wing concept.

Added 2011-03-07 at 15:00
Categories: Featured / White Papers, News