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Andrews Web Site
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Date: 9-17-2022
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Number of Hours: 6.00
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Manual Reference:
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Brief Description: Locating trailing edge for flaps and ailerons
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Built some more wing contour fixtures for the root and tip ribs. These fixtures have pins that allow easy installation and removal. The fixtures were installed, and then a sting was added to preserve the trailing edge location when the fixtures are removed. There was quite a gut check when I installed the second trailing edge string. Of course, the strings should meet at the same spot in the middle of the fuselage if everything is built and rigged correctly. I had huge fears that they would not meet and that there would be some problem with dihedral, washout, or the thousands of other things that could affect whether the trailing edges meet at the same place. Fortunately, they met very closely. If you look at image 3, it shows the anchor point for the left and right wing trailing edge strings. Ideally and anchor point at the aircraft centerline should be the same between the left and right wing. However, in this case my anchor point is not quite in the centerline since I used angle iron to build the fixture. If you move the two holes to the actual, center, they are coincident. I'm sure that some variation here could be accepted, but it was good to see things lining up as they should.
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Contour fixtures installed on Left wing
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Typical string as located by fixture
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Anchor for strings at the center of fuselage
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