Tonight I drilled the forward spar caps. These are spar stiffeners that sit inside the spar flange, reinforcing the angle between the spar web and the spar flange. One for the top edge, and one for the bottom. The caps are not pre-punched, and they are slightly bowed, meaning a lot of clamps and Clecos are needed to keep them in position while the holes are match drilled from the spar. Everything looks good, although I anticipate some very minor alignment issues. It’s very hard to keep everything exactly lined up.
