----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----
Is that from 43.13? There must be overall unit limits however as shaving a 10th of the material off the front of the spar cap would be somewhat excessive (no really). With respect to fatigue cycles, there is no requirement for a fatigue index to be calculated for coupes. IMHO the center-section front spar is as near to over-built bullet proof as you can get, while the rear is just along for the ride AS LONG AS IT MAINTAINS IT'S INTEGRITY. The loads on the main are trivial compared with it's strength and I would expect the outer panel to break up long before the center section reaches its limits. With little or no outboard weight and the gear underslung the likelyhood of bending fatigue is remote. Corrosion however is a different, but more easily diagnosed, problem. Jim Read Warren Hampton wrote: > And to add to Jim and Jims notes. Add you can only go a 10th of > the metals depth. > > -----Original Message----- > From: Jim McLean [mailto:[EMAIL PROTECTED] > Sent: Tuesday, April 17, 2001 9:37 AM > To: Coupers Tech > Subject: Re: [COUPERS-TECH] Confusion and main spars > > ----[Please read http://ercoupers.com/disclaimer.htm before following > any > advice in this forum.]---- > Hi Jim, > What you describe does sound like exfoliation corrosion. It has a > peeling > appearance like an onion skin. Usually you can grasp a piece with > needle-nose pliers and just peel it right off the surface. I found the > same > corrosion in my center section on the inside spar cap face just above > the > main gear attachment bolts. I believe it is due to dissimilar metals. > I > have heard of people taking the exfoliation off down to clean shiny > metal > and > repairing just as you have done. Would still require inspection and > sign-off > by an IA, I believe. > Jim > --------------------------------- > to unsubscribe send mailto:[EMAIL PROTECTED] > 415-C #4019 Rebuild Area 49, Van Nuys (VNY) --------------------------------- to unsubscribe send mailto:[EMAIL PROTECTED] ==^================================================================ EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Sid.bAhN69 Or send an email To: [EMAIL PROTECTED] This email was sent to: [EMAIL PROTECTED] T O P I C A -- Learn More. Surf Less. Newsletters, Tips and Discussions on Topics You Choose. http://www.topica.com/partner/tag01 ==^================================================================
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