Van's RV-9A in Aurora

The Big Picture

The Big Picture
Flying! 8/28/2011

Thursday, October 30, 2008

2.2 hrs

Marked the stringers for match drilling. I think the instructions are a bit off here. They say to mark a centerline 3/8'" from the unbent edge. The problem is that's nowhere close to the centerline. After inserting into the channel, it became impossible to get that line matched up in the predrilled holes in the skin. It's clear that the stringer only goes in one way, and has to be flush to the skin. I MEK'd off the first line, and remarked, this time about 9/32 from the edge. This was much closer. But in the end I reached over the top, felt for where the stringer goes through each rib, got it flush, and centered, and then drilled the hole. This may not have hit the line, but I'm confident it's the optimal place for the hole at that rib.
After this delay, finished match drilling the stringers to the left wing.