Sling 4 for Matt Build Log

When last I spoke of this, I had drilled and cleco'd the second EL wing tip using the fitting technique Craig wrote about. The technique was easier on the front end and easier on the backed. Here was my starting point: Removed and cleaned the composite: It's still a challenge fitting the wing tip back into the skins. I aligned the composite with rivets and required no reaming. Note that on the tailing edge, one side uses a short rivet (4mm) and the other uses the standard length (8mm): Even though not pictured, I replaced every other rivet with clecos and riveted the wing tip on. The gaps between the skin and the composite were smaller on this side, but the composite had a few spots that need to be filled. Final Thought: I'm glad that I put heavy-duty castors on the work benches. It's convenient to be able to reconfigure the work space quickly and easily. 1 hr Next steps: Fix EL trim gusset (ugh!) Install EL access plate r...

With the left wing tip riveted, I started on the right side. Before that, I reviewed Craig's blog for how he handled the EL tips. I was curious about the gap between the skins and the composite, but I also found his approach to drilling the holes. Following Craig's example, I aligned the composite against the skin and drilled the first hole at the trailing edge. The composite is much more rigid at this location and the drill bit is able to cut through. Put a cleco in and move to the next hole. The cleco held up the composite material enough to be able to drill through. Insert another cleco and continue. This approach was much easier than parking holes and using a drill press with a backing block. The second guidance I gleamed from Craig was the use of a filler to even out the gap between the skin and wing tip. I knew I had seen this before, but I wanted to confirm the solution. I saw this in person on Phil's TSi . I made return to this post and add pictures later. ...