After getting some feedback during my recent Tech Counselor visit, I had a few items to address on my rear spar (some rivets that needed attention). I started off by re-checking all of the rivets on my rear spar to make sure they were in-spec. For those that were out of spec or “marginal” I went ahead and drilled them out or if they were not set enough I marked them with tape so I could hit them with the rivet gun. Once everything was drilled out, I had a few places where I scratched the primer. Read more
Ok, so first I’ll apologize as this timelapse is all over the place. Well, honestly I was all over the place as I ended up making a few errors as I have been juggling a few things.
Getting ready to rive the rear spar to the wing ribs I deburred and primed everything. I then began to cleco everything together and was trying to utilize my squeezer to set the rivets for the rear spar. Honestly, this didn’t really work all that well as I still was going to use the rivet gun for a sub-set of rivets. Also it was just plain difficult to get the proper angle to even come close to setting the rivets correctly.
After setting a few rivets, I realized I had not dimpled some holes:
Page 15-4: Step 3 – “Dimple the holes in the ribs lower aft tab and the holes in the W-1007A-L Rear Spar Web lower flange that correspond to the tabs.”
After looking at these locations to see if I could use the squeezer or some other method of adding the needed dimples, I realized the best solution was to remove the offending rivets attaching the rear spar, correct the oversight and re-rivet the parts.
- This is a great lesson to learn. Take your time and re-read the directions.
- You can fix just about any mistake and you will make mistakes.
- Removing rivets is a skill you really need to learn 🙂
Here is what you get after removing a bunch of perfectly good rivets:
With the rivets removed and the proper parts dimpled, I re-rivet the rear spar to the ribs again. This time with less errors and in a much more comfortable position!.
I then begin to prep the rear spar for the right wing by removing the blue film and drilling the doublers. I also fabricate the doubler with the cut-out for the pushrod using a few different tools. Honestly the file is still my “go to” tool for this kind of stuff.
With all the doublers fabricated, I attach everything to the rear spar so I can match drill.
While waiting for an opportunity to prime (sensing a theme yet?), I decide to start section 15 – the Rear Spar.
The first order of business is to pull out the SB-16-03-28. Initially I tried to figure out what steps I need to replace from the build manual (I’m working off revision 07/24/14). Honestly it took me a while to figure out that the SB kit replaced step 2 on page 15-2.