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The
Van Munster 505
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Since the World Championships in Portugal
there have been several adjustments made to our tooling system.These modifications have
been made in consultation with Current World Champion Holger Jess and 5 times World
Champion Krister Bergstrom. We have designed and manufactured a series of inserts to our
tooling system that allows owners to semi customise their boat setup and layout by the
combination of our standard mouldings with the new inserts to achieve a personalised boat
layout.
Modification includes the option of a new longer centercase trunk.
Two mast step heights.
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Longer mast gate and low mast step allows
rig to be stepped at class max aft.
Another photo here.
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A customised female moulded carbon fiber
bar can now be retro fitted for helmsman that want to use an adjustable mainsheet bridal
system for mid boom sheeting. The bar is wide enough to allow small cam-cleats to be
mounted on the bar.
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A custom made jib turning block can also
be fitted to the bow to allow the forestay adjustment to run through a mandril spun carbon
tube in the fordeck section into the cockpit.
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A carbon fiber recess can now be
laminated into console to allow jib cleat to be mounted flush with the thwart further
cleaning up the cockpit while making the cleat less obtrusive to the forward hand in light
winds.
For more information
Contact Brett Van Munster
vanmun@coastal.net.au
Van Munster Boatbuilding
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March 16, 2002
The following is some information on our
latest little project which may be of some interest.
Hopefully we should have some more comprhensive information and pictures within the next
couple of weeks.
As mentioned we are very excited about
the new prepreg carbon/nomex boats.
So far the constructed components are lighter and stronger than any of our previous boats.
As always it has taken some time to get the pre-preg up and running as their has been many
technical issues to overcome due to the processing temperatures of the pre preg and the
complexity of the 505 mouldings .
We have chosen to go with SP systems.Their pre pregs have been specifically developed for
high tech grand prix boat building such as Americas cup/ Volvo. Due to their involvement
in these types of projects they have established the best product, technical support and
knowledge of this of pre-preg boat construction. SP systems Aus have been fantastic in
this respect and have helped us with everything from laminate schedules, structural
analysis down to "hands on" laminating the first deck which is for Chris
Nicholson.
The hull and deck components are laminated with SP systems SE 84 prepreg. We are using
plies of 150 (HEC) uni carbon laminated either side of a 8mm phenolic coated aramid base
honeycomb core. Two plies of uni carbon are typically laminated in 0/90 direction through
out the hull and deck components to give a 300gm/sqm skin thickness. Areas of high stress
and impact such as the floor area along the centercase, mast step. The mast gate and top
of the tanks also have additional plies of uni carbon that significantly build the skin
thickness, strength and stiffness into the components. The bulkheads, spinnaker chutes,
centercase console are all wet laminated out of Sp systems latest generation Ampreg 22
resin with a combination of uni directional carbon/ twill weave carbon/ cotech +/- 45
double bias cloths. Divinycell closed cell foam is used in the bulkheads and console.
As you can see, only the best materials available are being used in the construction of
these boats. The combination of the best materials and the associated processing
technology of the epoxy prepreg produces components that are extremely light, stiff and
strong.
Calculations suggest that the expected bare hull weight to be around 65kgs (this is
actually a conservative estimate as the first deck weighed in 5kgs less than the original
calculations upon release from the deck mould).
The major weight savings of the pre preg construction over conventional wet laminate boats
are made in:
higher fibre/resin ratio, core and corebond adhesive and gelcoat.
Because we have not yet finalised bill of materials, costs of spray painting or labour
content of the prepreg construction it is difficult to give an exact quotation on the
final price.
I will endeavour to keep you updated on the progress of the new boats and send some
pictures of construction and get a price finalised ASAP.
Regards
Brett
Ph /fax +61.2.43253902
Ph +61.4.12505483
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