Archive for May, 2008

Center Section Parts Fab. Final

May 26, 2008

I finished all the parts fabrication and drilling this evening for the center section. Now I’m ready to clean, etch, and prime all the parts for the firewall and the center section this week before my trip to Arizona.

Tasks Completed:

  • Finished drilling the conduit holes in the cover support ribs.
  • Fabricated the spacers out of the aluminum tubing.

Catching Up

May 18, 2008

We had great weather in Seattle over the weekend for the first time in ages. I worked here and there on the project this weekend so we could all enjoy the outside as much as possible.

Tasks Completed:

  • Drilled and countersunk the web stiffeners
  • Started drilling the conduit holes in the cover support ribs
  • Dimpled the forward bulkhead for the web stiffeners

Center Section Blah Blah

May 10, 2008

Tonight I started marching through all the remaining parts prep. The center section is proving to be quite tedious. There are a bunch of little items to do and you have to pay attention to the plans much more on the fuselage. I am reading the plans over and over to avoid drilling the wrong hole on these parts.

I almost plowed ahead with drilling a third hole in the small cover support rib before really seeing how it goes together. Also Ken Scott confirmed for me that you actually dimple the web of the forward bulkhead. I had initially assumed this would be countersunk! If I can get a good day’s work in later this week, I should be ready to prime the firewall and center section parts as soon as the weather is good. 

Tasks Competed:

  • Installed all the nutplates to the bulkheads
  • Drilled and prepped right web stiffener
  • Drilled and prepped cover support ribs

More Center Section Fun

May 8, 2008

The F-633 R control mount replacement magically appeared on the front steps today. I promptly went downstairs, drilled and trimmed the part per the plans. Using my drill press this time around yielded a perfect result. I mounted both brackets and test fit the control arms. It all worked perfectly.

Tomorrow I will be drilling and riveting all the nutplates and … 

Tasks Completed:

  • Remade F633R
  • Mounted F633R to aft center bulkhead 

Center Section Riveting

May 6, 2008

The right side control mount didn’t turn out to my liking. It didn’t sit flat with the bulkhead because the holes are slightly off 90 degrees. I ordered a new part and moved on to riveting the forward bulkhead and arms together. A couple of rivets look suspect. I’ll drill out and redo tomorrow.

Also I spent time with the plans trying to figure out whether to countersink the bulkhead for the web stiffener riveting or dimple it. The bulkhead is .040. Technically for an AD4 rivet the material should be .050 thick. But if I dimple the material I am afraid I will enlarge the hole on the .063 web stiffener angle. Time to write Van’s.

Tasks Completed:

  • Riveted F704A,C, and D together.

Center Section Fitting

May 4, 2008

Tasks Completed:

  • Started to rivet risers
  • Fabricated web stiffeners
  • Riveted spacers
  • Disassembled Firewall
  • Prepped firewall pieces for priming 

Center Section Drilling

May 3, 2008



Tasks Completed:

  • Matched drilled and deburred holes for F704 A,B,C,D parts.