And the Construction Drawings for the 37/40 Series, showing the layup schedule for 1990, and layup details, etc are online here: https://c-c-37-40.blogspot.com/p/blog-page.html
Ken H. On 29 May 2018 at 16:39, Francois Rivard via CnC-List <cnc-list@cnc-list.com > wrote: > Hi Thomas, > > Below is what I know about the layup schedule on the 34 / 37 + boats. I > got this off a forum somewhere (Not this one) a few years ago. > > Topsides (total thickness 1.19") > 1. Gelcoat > 2. 1.5 oz. Chop > 3. 1.5 oz. Mat > 4. C72K/100 Kevlar Fabmat > 5. 1” Balsa Core > 6. C72K/100 Kevlar Fabmat > > Bottom (total thickness 1.23") > 1. Gelcoat > 2. 1.5 oz. Chop > 3. 1.5 oz. Mat > 4. C77K/200 Kevlar Fabmat > 5. 1” Balsa Core > 6. C72K/100 Kevlar Fabmat > > Tuck area at turn of bilge to keel sump two (2) additional layers of > C77K/200 Kevlar Fabmat are added to the interior layer of the bottom > schedule for a total thickness of 1.39" Keel sump has Balsa replaced by > two (2) layers of Compositex. > > DuPont Aramat C72K/200 seems to have been an E-glass/Kevlar hybrid weave. > The following is all I could find out about the stuff on the web: > > Composition of the glass/Kevlar hybrid, DuPont's Aramat 72K/200: > > Component G/SQ.M OZ/SQ.YD Wt. % in Base Fabric Wt. % > inTotal Fabric > Glass Fiber 245.6 7.2 63 > 41.1 > Kevlar 49 144.0 4.2 37 > 24.0 > Mat Backing 200.0 5.9 -- > 33.5 > Stitching Yarn 8.0 0.2 -- > 1.4 > Total 597.6 17.5 > > > Hydrex is a trade name for a product line from Reichhold Chemicals. The > original product was a VE/DCPD blend resin that offered the blister > resistance of VE resin, but with the tensile elongation or 2.4 which is > comparable to a good GP. The added DCPD allowed the resin to be promoted at > the manufacturer rather than the shop floor. It was a very good resin, but > not one which would have been ideal for an aramid laminate. > > Hydrex 100 is a full VE resin with tensile elongation of 3.4%. Many VE > resins have an unstable gel time and need to be promoted at the shop to > insure that it does not drift out of range. Reichhold improved the > stability of the resin so that they could still promote at the manufacturer > and get stable gel times and cure rates. They now offer lower styrene > versions as well. > > There is some description of the layup on the 34+ here as well: > http://www.cncphotoalbum.com/reviews/review34-36.htm > > I hope this helps. > > Jean-Francois Rivard > 1990 34+ "Take Five" > Lake Lanier, GA > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > >
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