Catana Catamarans

The sandwich construction


CATANA boats are built entirely of sandwich construction under vacuum. For a catamaran where each hull sails over different waves, its strength and long life depend on the rigidity and consistency of the boat’s structure. The core of the hulls and bulkheads is made from PVC foam, with a density of 75 kg/m3 and a minimum thickness of 20 mm. The core of the decks, platform and coach-roof is made with foam up to 40 mm thick).
Sample of the stem : (Fig. 13). A - two coats antifouling ; B – thick gelcoat (8/10 th) ; C - uni-directional, high-resistant, tri-axial glass fiber ; D - core of PVC foam ; E - uni-directional, tri-axial Twaron® materials.

The structure integrity

21 structural bulkheads assure the rigidity and therefore long life of a CATANA (Fig.13). The bulkheads are all of sandwich construction and reinforced with carbon fiber on both sides, fully laminated to the hulls, the deck, the coach-roof, the cockpit, and all the surrounding structures. The hul1/deck joint is glued and completely laminated with several bi-axial materials.  
The hull and deck of a CATANA are as solid as though they were cast in one piece. A CATANA will keep its shape with exceptional rigidity, not only because it is totally of sandwich construction, but also because it is reinforced by a uni-directional material which bears all the strain of bending and twisting (Fig.14). This method of construction guarantees an outstanding strength and lifespan.

Exclusive Twaron® Impact Process

Twaron® Impact is a construction process which mixes rigidity, lightness and mechanical resistance, owing to a top-of-the-line, high resistant fiber. Twaron® is used in the manufacture of military helmets, bullet-proof vests and the aviation industry. It is several times more resistant than glass fiber and is particularly resistant to breaking under tension, scratching and collision.  
 
Impact resistance and weight saving  
The hulls are reinforced with Twaron®. Because of the weight saved by using this fiber; a cruising boat can carry more water, fuel and equipment without affecting its handling or comfort in heavy seas: its performance is optimized. This aramid fibre used throughout the interior skin of the sandwich is 10 times more resistant to puncturing and 3 times to tension than classic glass fibre. Even in the case of hitting a floating object violently, you will be able to continue your trip... more especially as the absorption by the foam of the shock wave increases your safety.  
 
Vinylester resin  

Our exclusive Twaron® Impact construction process uses Vinylester resin having the same mechanical properties as epoxy, but without its disadvantages in application or further repair. The boat’s total unsinkability and the enormous strength of the Twaron® Impact structure, mean that a CATANA can face the most difficult seas in greater safety than any other boat available today, whether a monohull or classic catamaran.  
 
Longevity of your CATANA  

That construction, combining several top-of-the-line technologies, guarantees an unrivalled long life for your CATANA, and an excellent re-sale value.