Glass mat and chopped strand are the same thing...CSM. The 34+ was probably a layup of CSM, woven roving, and kevlar in a vinylester matrix with balsa core. E glass is the same basis as woven roving, just a different weave. Cloth is a lighter version of roving. The woven roving in the 34+ and the 121 would both be e-glass, although the later boat would likely have some biaxial or unidirectional glass in places for better engineered strength. For more information, have a look at this...http://www.marinecomposites.com/
Jim Watts Paradigm Shift C&C 35 Mk III Victoria, BC On 1 March 2014 11:27, j...@svpaws.net <j...@svpaws.net> wrote: > I'm but an accountant not an engineer. Help me understand this stuff.. > > So if I use a 1990 34+ as the baseline, the hull was a composite of vinyl > resin, presumably glass matt and chopped strand, balsa core and Kevlar. > > Now fast forward to 2000 and my early 121. The glass Matt has been > replaced by E glass, balsa has been replaced by core cell, glass strand > remains to add bulk and the Kevlar remains. Presumably this provides a > lighter hull as the e glass is stronger than matt, core cell is lighter > than balsa and requires less resin and the Kevlar remains the same. > > Fast forward another 10 years and we have epoxy, reinforced with carbon > which does the job of Kevlar, matt, e glass and strand. The core cell > remains. > > Am I even close? > > John > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com >
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