I'll go one better, what about these? http://www.mcmaster.com/#rod-ends/=98sk3x
they have right and left hand threads so one simply turns it to adjust the proper alignment of the ailerons. Granted, it would need to use 1/4 rod bearings, but if you use the aluminum ones they sell, you are saving even more weight. Just a thought.... Fred Johnson Reno, NV Mark L wrote: The short answer to your question is 6061-T6 aluminum. I'm not really qualified to answer this, since my ailerons are completely different from what the plans call for, but at the time I built my plane, Rand Robinson was selling what looked like a short linkage with rod end bearings on each end (and I think the housings on those were aluminum), joined by a short aluminum rod that was threaded 3/16 on each end. The whole thing was maybe 5" (that's probably in the plans), it was very light, and was almost certainly a specialty item made just for that application. Maybe Steve Glover sells those these days, but you turn down your own version of the center member if you had a lathe, the experience to run it, and the time to do it. And then there's locating the lightweight rod end bearings, but I'm sure they're available from somewhere...
