hi gardner,    my experience with sidecar which has lost its antifouling on the bottom from scraping across sand too much, but the glass and undercoat are fine. only the bows need heaps more than present, i noticed rob said 3 layers recently for harriette, where i only put one layer on sidecar - hence lot of easily damageablt points. i woulod have said the broad flattish bottom would not need reinforcing, just watch the antifouling, but the sharp bows, and also i have damaged quite deeply into my rudder blades on the bottom front tip - so kevlar, nylex ? and solid dense bog at the rudder tip.   doug   so decided how big a boat? remembered interest in sidecar while ago. --- On Fri, 24/4/09, Gardner Pomper <gardner@networknow.org> wrote: From: Gardner Pomper <gardner@networknow.org> Subject: [harryproa] Bottom construction for beaching? To: harryproa@yahoogroups.com.au Date: Friday, 24 April, 2009, 10:52 PM Hi, I was wondering how to make the keel of a harry tough enough to be able to beach it, for letting it dry out or working on it after the tide goes out. I figure just sitting there isn't too much of a problem, so long as it isn't an obsidian beach, but the boats always bounce a bit as the tide goes in and out. I was planning on 15mm Airex core, with 18oz biaxial fiberglass on either side. Think I am ok with that, or should I add a 2nd layer of fiberglass? If I just do it below the waterline, I am only talking about a strip 12" wide or so (maybe 50 sq ft total), so the extra weight or expense isn't huge. I could even get some 12oz carbon twill for about $7/sq ft. Opinions? - Gardner

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