Some of us have all the luck.. eh --- Will Moore <[EMAIL PROTECTED]> wrote:
> > Sounds like you may have it covered then. As I've > never seen the 1 mm > face sheet panels, I can't really comment on them > much, but just from > the thickness I can imagine they're pretty durable, > strong stuff. And > adding in the additional epoxy seems like even more > "insurance" > against unseen damage. > > I'm still working on how the transition from > astrophysics to sail boat > manufacturer occurred ;). Don't get me wrong, I'm a > mechanical/aerospace engineer myself and love to > sail, but I'm also > not able to talk my employer into letting me build a > 60 ft cat in the > back yard of the plant... > > > On Wed, 1 Dec 2004 22:09:09 -0800 (PST), Dhananjay > Anand > <[EMAIL PROTECTED]> wrote: > > > > That was a concern, that we had early on. > Aerospace > > honeycomb panels, have very thin face sheets, > ranging > > from 100 microns up. We use 1mm alloy face sheets > on > > most panels and some "cosmetic" panels have a 0.5 > mm > > face sheet. Also, the aviation and space grade > panels > > are, bonded using a film adhesive, we lob on epoxy > > resin. So there is literally another 1.7 mm epoxy > > layer below the face sheet. Albeit, your point is > > definetly valid, only time will tell I guess. > > > > P.S. I have dropped a ball peen hammer on one of > the > > panels from 10 feet above. No, visible damage. > > > > > > > > --- Will Moore <[EMAIL PROTECTED]> wrote: > > > > > > > > > It is GRP with marine ply bulkheads and carbon > > > fiber > > > > cross beams and mast.(I will attach those pics > to > > > the > > > > album in a few hours) > > > > The deck panels that you see are all aluminum > > > > honeycomb sandwiches. (Fantastic stuff!) > > > > > > I'm not normally one to chime in much, but with > a > > > background in > > > aerospace, I've seen a lot of use of the > aluminum > > > honeycomb. The > > > stuff is great! It's lite, strong, stiff, > > > everything you could want. > > > > > > Until you get a puncture of the face sheets. > There > > > are tremendous > > > problems with very small (almost invisible to > the > > > naked eye) holes > > > letting in water and other elements which then > lead > > > to severe core > > > delams and corrosion issues inside that are > never > > > seen from the > > > outside. This happens VERY frequently and > thorough, > > > routine > > > inspections are required to ensure structural > > > integrity. You drop a > > > wrench, screwdriver, whatever, suddenly you > could > > > have a large problem > > > forming of which you're not even aware and can't > > > see. I've seen > > > 30-40% of entire aircraft fleets grounded for > > > problems like these > > > pending repairs. > > > > > > Anyway, just my 2 cents worth, and that's about > all > > > it's worth. > > > > > > Will > > > > > > > > > Group Home > > > http://www.TheBeachcats.com > > > > > > > > > Yahoo! Groups Links > > > > > > > > > [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > > > > > __________________________________ > > Do you Yahoo!? > > The all-new My Yahoo! - Get yours free! > > http://my.yahoo.com > > > > > > > > > > Group Home > > http://www.TheBeachcats.com > > > > Yahoo! Groups Links > > > > > > > > > > > > > Group Home > http://www.TheBeachcats.com > > > Yahoo! Groups Links > > > [EMAIL PROTECTED] > > > > > > __________________________________ Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. http://promotions.yahoo.com/new_mail Group Home http://www.TheBeachcats.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/beachcats/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
