PDF

10/09/25 - Cowling (part 8) drilling on skybolt plates - 4h00

I continued today on the layout of the tabs on the passenger side for the lower cowl based from FSF-R bracket. To be in symmetry, I used the same spacing with 5 brackets below FSF-R.

During drilling I wanted to make an additional rivet hole due to a hole being close to a bracket tab end.

I had a bad day... as you can see, the drill wandered on the steel plate and messed up the hole in the fuselage skin. Fortunatly no cracks or anything like that and it's an additional hole. I finally got through but the hole went to the left so also edge distance there will be crap. I'm just going to put a rivet in it and fortunatly the rive head covers the missdrilled hole.

A little higher up the row, I also made an additional rivet hole. This one went fine.

As I mentioned the bad hole is also moved inwards and is out of line. There goes my Grand Master Prize Champions title at Oshkosh.

Countersunk and deburred all backets and primed both pilot and passenger side brackets

Once dried, I placed them back where they will belong. 

Details
6. Firewall Forward
6.10 Sam James Cowling
Hits: 333

6. Firewall Forward

Legal Mumbo-Jumbo

It’s possible (not likely) that I’m not as smart as I think I am. (Occasionally, I have moments when I know this to be true. Fortunately, the feeling passes quickly.) Although I have tried to make this information as accurate as I can, it is not only possible, but also quite likely, that erroneous and misguided information lurks within these pages. I cannot and do not warrant these pages to be error free and correct. Furthermore, I accept no liability for the use of this (mis)information. And, as many would say, your mileage may vary. If, after reading this, you are intent on proceeding, please be aware that the contents of this site are protected by copyright (copyright © 2011 and 2012). Nonetheless, you may copy this material subject to these two conditions: (1) any information used is for non-commercial purposes, and (2) the source of the material is properly credited. Of course, you may link to any page herein. At some articles, snippets of the plans from Vans are visible. These are for educational and illustrations purposes only and should never be used as plans for part construction or assembly as plans may have changed since the picture was taken and more important they are protected by Copyright by the Vans Aircraft Mothership company.