I actually had an idea along these lines, as a solution to this problem... If I were to stack enough washers under the axle-attach bracket to bring the gear into alignment, coat the attach-bolts & bracket with grease as a release-agent, and seal the bottom 3 sides with tape....
I could then pour a suitable 'structural filler' (Hysol 960F, or (if we're going to be redneck about it) JBWeld should work) in from the top and create composite shims with a perfect clamping-surface... That said, Mark L & everyone else seemed to be using fabricated metal, so I thought I'd investigate that option first... On Mon, Mar 23, 2015 at 3:03 PM, Jeff Scott via KRnet <krnet at list.krnet.org> wrote: > You guys are supposed to be airplane builders with skills to build > composite parts. Fabricate a small box with the appropriate slant to it > for the shims you need, then lay up a shim with the dimensions you need. If > it's not quite right, you can grind, file or cut to suit yourself. Do a > test fit to see if it's right, then when you install it, bed it in a thin > slurry of milled fibers for a no slip perfect fit. If you have to go a bit > oversized on the holes through the gear leg to get a proper fit (and keep > the bolts straight), grease your bolts up with wax (so you can get them > back out and backfill the holes with a milled fiber slurry. > > Additionally, try to drill things so your bolts are straight and use a set > of self aligning washers on the side where the head of the bolt or nut > appears to be an an angle to the surface. Self aligning washers are a pair > of washers, one with a concave surface and the other with a convex surface. > The concave surface of one washer sits on the convex surface of the second > washer allowing them to cock off sideways from the bolt head and adapt to > the surface of the gear leg. When you pull a bolt down onto them with a > hole that isn't normal to the head of the bolt, the two washers will swivel > a bit to properly distribute the pull of the bolt onto the surface without > side loading the axle attach bolt. Just google "self aligning washers". > > I used this technique to repair the landing gear on a GlasAir that had the > gear badly misaligned, then the holes overdrilled and the bolts literally > bent in the bolt holes hanging onto the axles. > > -Jeff Scott > Los Alamos, NM > > > _______________________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
