are produced from symmetrical, CNC machined aluminium moulds
whose surfaces are heated to 280oC. Fibres pre-impregnated
with epoxy resin are laid out in the mould and compressed
under hydraulically applied pressure. The use of prepreg fibres
reduces micro-voids in the composite for the optimized strength,
fatigue resistance and flex response. Prepreg technology also
allows for an accurate cut and positioning of each individual
layer which in turn allows designers to achieve a very specific
flex pattern without compromising the shape of the fin. Prepreg
is the ultimate and most accurate construction for fins over
40cm where any other method would result in blade that is
too thick, too thin, or too soft.
The materials used are a combination of carbon weave, biaxial
carbon, glass weave and 3 dimensional GTX fibres (Glass tri-axial).
The GTX fibre’s thick compressible nature allows the mould
surfaces to close fully and ensure a blade whose shape is
true to the original. Each prepreg fin is individually custom
finished by hand, with a minimal paint and gelcoat finish
to meet tighter tolerances.