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January 28, 2006:
(3.0 hrs.) Yesterday when I assembled the aft fuselage, I
neglected to cut the J-Stiffeners to length and insert those, so I did
that first thing this morning. These J-Stiffeners act as stringers
along the fuselage adding strength.
Next I had to make sure there was no twist front to back on the aft
section. Here I am using a level across the side skins, a plumb
bob hanging down from the the F-706 bulkhead center tooling hole, and a
SmartTool digital protractor clamped to the vertical bell crank rib.
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When things are level and plumb back to
front, the match drilling can begin. |
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Match drilling the skin to the
J-Stiffeners. |
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With everything drilled, the whole
assembly comes apart. |
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Onto hole deburring. Here I am
deburing a J-Stiffeners.... Note the funky cut on the end of the
J-Stiffener. These get made on both ends of the bottom and upper
J-Channels so that they can fit snugly against the bulkheads where they
end.
I also deburred all the bulkheads. |
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Deburring the edges of the J-Stiffeners on
the ScotchBrite wheel. |
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Dimpling the J-Stiffeners.
I also dimpled all the bulkheads. |
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This is the tail cone getting dimpled.
This skin is probably right on the margin of being thick enough to
countersink and thin enough to dimple. I opted to dimple because
it is easier and looks better. I used my tank dimple dies on along
the edges where the skin mates with the side skins and bottom skin.
The tank dimple dies make a slightly deeper dimple. This should
help the parts mate better. |
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January 29 2006:
(3.0 hrs.) Used the soldering iron trick on all the skins to
remove just the plastic from the rivet lines.
Next I deburred all the skin holes |
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Deburring the skin edges with a
ScotchBrite wheel in by die griner. |
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Used this hand seemer tool along the
bottom edge of the side skins. This should make the skin overlap
joint have a nice tight fit |
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Dimpled all the skins.
Now everything is ready for prep and priming. I think I will
prime the bottom skins of the aft section, just to add a little bit more
protection. |
