The investment in a sophisticated carbon
filament winding machine and autoclave enabled Selden to produce a new
generation of carbon spars.
The following steps ensure that Seldén can
manufacture the best performing and most consistent spars on the market:
In-house specialist design team
Seldén has the design expertise and software
to create a mast to meet exacting performance requirements. During the
design process the position and alignment of each fibre is precisely
calculated so as to meet the required bend characteristics. This
detailed design is then used to program and control the filament winding
equipment. The combination of meticulous care, long experience, and
exact specifications enable Selden to achieve optimum performance for
Computer controlled laminate lay-up
Carbon filaments are wound around a mandrel
(male mould), under controlled tension, via a designated winding program
supplied by the design team.
Filament winding, a computer-controlled
process (CNC), guarantees consistent and accurate filament fibre
orientation from spar to spar. Carbon filaments can be laid from 0°
(uni-directional) to leave 89° (hoops) and at all angles between to
produce a wide range of bend characteristic requirements. This accurate
alignment of composite filaments is vital to the performance
characteristics of a carbon spar. Fibres are laid under tension, which
means that Selden can make the most efficient material choice and supply
the lightest spars on the market. This process gives a Seldén spar a
level of tube consistency unattainable via any other composite
manufacturing technique. Hence, the mast you buy will perform as well
for you as it will for a world champion sailor!
Use of pre-preg carbon
Only the highest grade pre-preg tows of T700
or TZ carbon fibre are used to give sailors the best stiffnessto-weight
spar. This, in combination with the filament winding process, enables
the highest fibre-to-resin content pre-preg to be used.
The aerospace grade pre-preg has a UV
stabiliser in the resin system to give the spars a guaranteed long life,
even in the sunniest of climates. More fibres and less resin, mean
lighter, stiffer masts.
The consolidation of the material to form a
ready-to assemble carbon tube is completed in Selden's in-house 20-metre
long autoclave. The combination of heat and pressure to cure the resin
and consolidate the pre-preg material ensures a strong and consistent
Profiled teardrop section.
Custom-designed PVC track.
Carbon track - A carbon sail track can be
specified as an option on some masts.