In a stagnating think-tank of ideas, we’ve create a unique product and addressed the issue of rigidity and adaptability all within the one design concept. Two individual left and right chambers running the full length of the board, segmented by a unique narrow centre hollow void, constrained by an outer compression-band.
Uniquely more rigid than any other inflatable, Twin Air Technology® in this format provides harmonies outlines, ideal volume distribution, rocker lines and unique details within the construction.
In relation to inflatable boards, we consider both static and dynamic loads. When standing motionless on the board, bend or flex is determined purely by load (gravity) acting downwards on the board. This is said to be static load. When paddling, compression downwards from the rider during the act of paddling, particularly at the entry and catch phase of the stroke, exerts a dynamic load which combines both the weight of the rider and the resulting downward force created through paddling. The board therefore flexes and thereafter springs back to assume the static load position during the exit and recovery part of the stroke. By conjoining x 2 narrow chambers, flex is significantly reduced as a consequence of reducing the total surface area of each. Narrow width chambers can be made stiff, whilst wider chambers are harder to make stiff. In tests, a ‘regular’ inflatable with 75kg static load, bends @9cm but only @3cm with Mistral’s Twin Air Technology®.
Mistral’s Twin Air Technology® in using 2 sepa-rate narrow chambers, sealed around the outer rails by a singular compression-band, limits both static and dynamic load affects in relation to flex. Past systems have included, side fitting battens, carbon stringers and turn-buckle assemblies, but have all failed to add true stiffness to accep-table levels of difference. In addition they often required more hardware, more weight and more inconvenience.
Woven drop stitch is an advancement over knit-ted drop stitch and recognised for its improved level of structural integrity, rigidity, reduced weight and use of less material. Increased thread counts per inch of narrow diameter make this possible in addition to the pattern in which they are attached between deck and hull panels. We therefore choose to use this material to improve performance.
Twin Air Technology exceeds safety standards in having a 50/50 split reserve air, so as if one chamber is compromised, 50% remains.These exceeds the standards for example expected by TUV Certification.
Mistral’s Twin Air Technology®, utilises dual, full length, conjoined hull segments, ensuring super rigid construction and new levels of safety, with a 50/50 split of total air volume between two individual and identical halves. A unique central stringer void formed between the segments, permits multi-positional, friction-fit of hardware, such as fins, daggerboard and mast foot
(Windsurfing) without the need for such items as fin box or daggerboard casing. In addition utilisation of the latest, lightest, woven drop stitch fabric, elevates these Mistral boards beyond the ordinary, so as to be truly, uniquely different.