JohnDRead(at)aol.com
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 Posted: Mon Mar 05, 2007 9:00 pm Post subject: 7V6-2SP Alignment |
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Hi Mark:
I had a similar problem regarding the height of 7V6-2SP when I built my first wing. The positioning template needs to be made very accurately to locate the rear channel. When I was making mine I first made the 715mm dimension from the spar face to the small end, this could cause the problem you are having. The 715 dimn. is not important to the location of the rear spar. I eventually noticed that the dimension should be 696mm. BTW when a dimension is placed in a box it means (Basic) and that extreme accuracy should be used to comply with such dimensions. The 696, 67 and 209 mm dimensions are critical to the location of the rear spar. I also noticed that there was no dimension for the width of the small end of the fixture it should be 45 mm Basic for a snug fit into 7V6-2SP. Fortunately making the fixture long allowed me to correct the initial error. Take a look at the photo guide for the wings Section 2A page 8 of 12, you will notice that the rear channel protrudes above the rib. You can see it in all of the pictures on that page. When the top skin is assembled it pushes the top flange down. My skins were pre-punched and fitted fine. Hope this helps.
John Read
CH701 in Colorado
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