TrentF said:Also I think the Stitts oil is supposed to seal up any pinholes in the weld.
What do the cub kits do about corrosion proofing in the tubes? None of the websites talk about it. I bring it up because a friend has had corrosion issues in the lower longerons of a Cub clone, where the floorboards attach.
So I guess there are two questions here: Is corrosion a real problem in modern Cubs which, like my friend’s, have never been on floats, never landed on a sandbar, and never been within 500 miles of salt water? And what do the kit manufacturers do to prevent corrosion, particularly inside the tubes?
I don’t really want to get into details of his problem, as it isn’t my story to tell. This was just a Christmas party conversation. For all I know it’s total fiction. YMMV and other disclaimers........
What do the cub kits do about corrosion proofing in the tubes? None of the websites talk about it. I bring it up because a friend has had corrosion issues in the lower longerons of a Cub clone, where the floorboards attach.
So I guess there are two questions here: Is corrosion a real problem in modern Cubs which, like my friend’s, have never been on floats, never landed on a sandbar, and never been within 500 miles of salt water? And what do the kit manufacturers do to prevent corrosion, particularly inside the tubes?
I don’t really want to get into details of his problem, as it isn’t my story to tell. This was just a Christmas party conversation. For all I know it’s total fiction. YMMV and other disclaimers........
At least one popular kit attaches the floorboards with screws into the tubes rather than tabs. I didn’t think to ask about outside-in vs inside-out.Your friend's floor should attach to tabs welded to the tubes. He shouldn't have any perforations in the tubes themselves. I don't understand the description of lower longeron corrosion from attaching the floor. Certainly not internal corrosion.
I don’t want to out them to 10,000 SC’ers. PM sent. 8)Which kit does that? I've never seen intentional perforations into a tube frame. But I don't get out much.
It’s an S-LSA, so the factory drilled the holes.
The consensus seems to be that I shouldn’t expect the tubes to be corrosion-proofed inside, and the floorboards should be secured to tabs or glued on or something that doesn’t involve holes in the tubes. Is that about right?
When I was building my Cub I had a junction we found that hadn't been welded closed yet. So as a precaution I put some crawling oil in. Boy was I sorry. I later I drilled a couple of very small holes in the tube just behind the sliding window for the trim to pin the rest of the trim in. I had long ago quit thinking about my corrosion worries. Long story short.. I later started covering the fuse, the oil very slowly but seeped down the tube and into the C window channel as I started to rotate the fuse. The cleaning dog fight was on. I finally overcame it after several days of repeat cleaning. Should've listen completely to the advice Bill gave me in the first place. I hope posting these mistake will help somebody else not make the same. Merry Christmas Friends!