Continuing on with the F-01418B Longerons after spending a few days on just the edges. Below, I've tried to show the sharp raw edges created when the holes are punched - these need to be smooth.
Below shows the difference between a deburred hole and a raw hole. (don't stress, all those little scratches were sanded out later.
I thought I'd show how easy it is to debur two sides of the one hole at the same time. This tool came in a set of five different sizes. It fits in a drill and has a tiny blade that depresses when a set pressure is applied in-line with the shaft. The pressure can be adjusted with a small grub screw in the thicker end of the tool. The blade is double-side, so when it passes through the hole, it performs the same action when being pulled back through the hole.
Wualla - Both sides deburred!!
Here it is being pulled back through the hole.
One longeron countersunk..........one not.
And on to the side skins. Not much to see here but decided to get them out at the end of the session to start tomorrow.........or later today as it was about 2am when I stopped here.
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