SeaCart 26 one design sails

New one design, folding version of the 30 now available

Thursday June 23rd 2011, Author: James Boyd, Location: Thailand

The SeaCart 26 one design, little brother to Oceanlake Marine's SeaCart 30, has had its first test sail.

Once again designed by Marc Lombard, but this time built by Composite Marine International in Thailand, the 26 aims to be a day racer suitable for both inshore and coastal racing. Calle Hennix's Swedish company Oceanlake Marine are intending on the new tri becoming a one design class.

The SeaCart 26 features the latest thinking in trimaran design from wave-piercing bows, spray rails, retractable curved foils and an ergonomic cockpit. Construction is in epoxy/E-glass with carbon reinforcement, making the hulls light and strong, enabling the SeaCart 26 to fly two hulls like her larger sybling.

The rig features a high-aspect square-top mainsail and carbon wing mast, furling jib and gennaker in One Design configuration, although a Code 0 and larger genniker can be added to this. The one design rule allows sail makers to come up with their own wardrobes.

The SeaCart 26 floats have a case built in for optional curved foils. Blind cases that are finished flush to the underside of the float shape are standard equipment. The additional curved foils will boost speed above 12–16 knots of TWS and work as a safety feature when extra lift is required to help prevent the leeward bow from burying. They also reduce the amount of pitching in choppy seas  sailing upwind. These features help make the SeaCart 26 behave like a larger boat. The curved foils may be integrated in the One Design rule, depending on take-up.

The Seacart 26 is also a 'folding' trimaran allowing for both cheaper berthing in harbours, but also for trailerability with minimum fuss.

CMI are fully geared up for production building the Seacart 26 with female tooling made over CNC machined masters. Hull are moulded using machine impregnated epoxy/glass with carbon reinforcement and vacuum bagged in a single ‘hit’ process. PVC core is heat formed in one piece to ensure light/controlled core bond. Techniques used for high load structures include full carbon/epoxy matrix with infusion or vacuum wet preg, and high temp, pre-preg systems, with the most appropriate technique being chosen to obtain maximum strength and minimum weight.

According to Calle Hennix during their first sea trials "one aspect that surprised the entire team was how the curved foils on the floats felt beneficial in conditions below the expected wind range. Upwind the boat became very steady due to the foil greatly reducing pitching through a rather choppy sea state. The advantage was also very noticable downwind under gennaker. Instead of continually being driven into and through the backs of the waves the leeward bow was lifted so it was able to glide above and slice through some without resistance."

SeaCart 26 OD vital statistics

Length incl. rudder 7.92 m / 26’
Beam 5.60 m / 18’4”
Beam Folded 2.33 m / 7’8”
Draft C/board down 1.49 m / 4’11”
Weight Empty less than 700 kg / <1543 lb
Mast Length 11.9 m / 39’1”
Design Marc Lombard
Builder Composite Marine Int.

One Design Sails:
Mainsail Area 26.3 m2 / 283 sq ft
Jib Area 11.2 m2 / 121 sq ft
Gennaker Area 43.7 m2 / 470 sq ft

Rating Sails:
Code 0 27.4 m2 / 295 sq ft
Large Gennaker 57.5 m2 / 619 sq ft



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