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Old 09-27-2017, 02:53 PM   #26
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First, don't change the hinges on the aileron unless you're absolutely sure that is the issue. It seems more likely the problem is the wing mounted hinge brackets. In any case I wouldn't think to plug the spar holes. I'd consider modifying the hinge brackets or making new ones first. You might be able to shim them at least as a test and that would not require complete removal. You need to find out exactly where the problem is and apply any fix there.

Before I spent time fixing this issue I'd want to confirm that the wings are rigged as close to perfect as they can be. Once that's done any left-over roll could be from the low aileron or some other source. That's when I'd be thinking about re-locating the aileron,,, or just living with a trim wedge or tab.


Project:Stretched Pitts S-1SS

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Old 09-27-2017, 04:15 PM   #27
Larry Lyons
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A brad point will probably eliminate that for you. As will a Forstner bit but they need to be mounted in a drill press to do a good job.

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Old 09-27-2017, 07:13 PM   #28
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Before I figure 8 the spar I'd remake the spar fitting you just removed the bolts from. If there is meat on them in the direction you'd need to go, and they are 4130, I'd have the holes welded up and just drill new holes on the metal bracket. Or make a new one. I don't know what the design of these are on this plane but if the rear spar is accessible this is the route I'd go. I'd have all the parts made up, slit the fabric below the spar so I could get the nuts and washers off. Hardest part is the fabric work if it's multiple colors etc. I'd try to make my slits small and on existing tapes.

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