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Jeff & Jackie's RV-8 Project
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Date: 2-10-2008
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Number of Hours: 3.50
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Manual Reference: 8-57 / 8-58
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Brief Description: Control system
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Its kinda fun, but also kinda frustrating. More work on the control system today with the installation of the pilot and passenger control sticks into the fuselage. I had tow issues to resolve today.
The first was that the plans call for 1/8" clearance between the ends of the bolts and the control tube to prevent binding and interference. I didn't have anywhere close to that. I was pondering whether to use a low profile nyloc nut and took photos to email Vans when I noticed that the pushrod was off center slightly. Sure enough, if I swap the bolts around the other way and grind them down a little (as instructed) then I get the clearance I need. The bolts are opposite to what is shown on the plans but I can't see any issue with that; nothing else is down that way.
Okay, make that three issues. The second was that when attempting to install the forward control rod-end bearing, the plans show the bolt head on the aft side of the bracket. Well, there is absolutely no way to get the bolt in after the rod-end is installed because it is too close to the center section. The answer (rather than turn the bolt around) was to insert the bolt first (through the bracket too), then install the rod-end. A little trickier to tighten down that way, but not too bad. I can't see why the bolt can't go the other way though. I guess this way there is no risk of it working out of there!!
The third, and most frustrating and time consuming, issue was that I found when I tightened down the pushrod linking the control sticks the assembly would bind slightly. Not overly, but I wanted to make it as free and smooth as possible so there followed multiple assembly and disassembly tasks while I located and removed the issue. Turned out to be the mounting holes in the rear seat mount which didn't quite line up; no idea why when they were all match drilled during assembly. Anyway, when the control mount is cleco'd down it pulls slightly rearward, putting tension on the control system by effectively increasing the distance between the two ro
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