Wing Top Skins Riveting
Last weekend I riveted the upper skins on the left wing. As I did when clecoing the skins in place, I started riveting onto the strongest parts first (4mm rivets into the main spar cap), then ribs, then stringers.
![](https://i0.wp.com/sling4.jetshine.net/wp-content/uploads/2019/04/img_2027.jpg?resize=225%2C300&ssl=1)
![](https://i0.wp.com/sling4.jetshine.net/wp-content/uploads/2019/04/img_2026.jpg?resize=225%2C300&ssl=1)
![](https://i0.wp.com/sling4.jetshine.net/wp-content/uploads/2019/04/img_2035.jpg?resize=139%2C300&ssl=1)
When pulling these blind rivets, it leaves an open hole that should be filled in. I borrowed an idea from Craig Maiman, who in turned got his idea from Kit Planes magazine, to use a light-weight spackle to fill in the rivets. I bought some from a local Sherwin Williams store, and filled a syringe with the material and then injected it into the rivet cavities. It comes out in a creamy/pasty consistency, and then hardens relatively quickly (within an hour) so that it can be sanded smooth.
![](https://i0.wp.com/sling4.jetshine.net/wp-content/uploads/2019/04/img_2039.jpg?resize=225%2C300&ssl=1)
![](https://i0.wp.com/sling4.jetshine.net/wp-content/uploads/2019/04/animated.gif?resize=169%2C300&ssl=1)
I wanted to add the step skins next, but I found an issue with fit of the skin. Specifically, the holes in the top step skin (WG-SKN-003-L-C-) did not line up with the bottom skin & ribs. My assumption was that the skin was bent incorrectly, which was confirmed by TAF technical support. This skin is pretty thick material, so there’s no way I can fix this myself – and besides, aluminum doesn’t like to be re-bent. I thought about drilling new holes, but because the mis-alignment is about 2.5mm, and the holes are 3.2mm in diameter, I would wind up creating a slot instead, and the rivet possibly could pop out over time. Instead, TAF will be sending me a replacement skin.
![](https://i0.wp.com/sling4.jetshine.net/wp-content/uploads/2019/04/img_2033.jpg?resize=300%2C225&ssl=1)
![](https://i0.wp.com/sling4.jetshine.net/wp-content/uploads/2019/04/img_2034.jpg?resize=300%2C225&ssl=1)
![](https://i0.wp.com/sling4.jetshine.net/wp-content/uploads/2019/04/img_2056.jpg?resize=225%2C300&ssl=1)
Since I had this issue with the left step skin, I decided to check the right side skin, but that one looks to be OK.
![](https://i0.wp.com/sling4.jetshine.net/wp-content/uploads/2019/04/img_2061.jpg?resize=300%2C225&ssl=1)
While I wait for a new step skin, I’m going to build the ailerons & flaps, and then get started on building the right wing.