![\"\"](\"https:\/\/mightyrv.com\/wordpress\/wp-content\/uploads\/2012\/10\/wing_center_support.jpg\" "\\"\\"")
<\/a>Wing center support<\/p><\/div>\n
The only feature that isn’t apparent in that picture is the flat surface on top. It’s just a piece of plywood left over from a wing crate, with a nut attached to the bottom with JB Weld. I didn’t want to clamp anything to the spar center lest it be damaged if the support was disturbed or kicked out of place.<\/p>\n
With the support in place, all that was left was to use it to remove any sag from the wing box. I didn’t have a plumb-bob or fishing line, but I did have a spiffy new laser level I found on sale at Sears. So in an awesome display of obsessive over-engineering, I used the laser level to get the wing box adjusted and sag-free.<\/p>\n
<\/a>Left wing laser-leveled<\/p><\/div>\n
The picture is a little dark, but you can see the laser line illuminating a row of rivet holes on the spar. I’ll definitely use the approved solution (fishing line and plumb-bob) to check twist before the skins go on, but the laser works well. And that threaded-rod support made it wicked easy to adjust the spar.<\/p>\n","protected":false},"excerpt":{"rendered":"
Yesterday I finally came up with a (relatively) inexpensive way to jack up the wing center per the plans. I used some spare threaded rod, Al angle and 2x4s to make these little adjustable supports. The only feature that isn’t … Continue reading