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KENNETH T.'S WEB SITE
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Date: 5-2-2009
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Number of Hours: 7.50
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Manual Reference: Dwg 24
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Brief Description: Fitting and match drilling top forward fuselage sk
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Marking the last row of holes on the right side of the top forward fuselage skin was not a easy task.
I had to lay on my back with my butt on the spar while holding a flashlight and couple of drill bits (#30 and #40) as Charlotte pushed on the skin. The first seven holes near the firewall are #30 holes, so I had to insert the drill bit and try to rotate it enough to make a mark. The bit had to go through the weldment, the longeron, and the side skin before I could make the mark. Needless to say I could barely rotate the bit. The other holes were #40 and I had to go through the longeron and side skin. Again difficult, but I only marked three holes, one just aft of the #30 holes, another even with the subpanel, and another as far as I could go aft in the forward canopy deck before I ran out of room for the bit. We unclecoed the skin and drilled the marked holes. We reclecoed to the frame and the holes, unbielievedly, matched! We unclecoed the new skin and clecoed the old skin to the new skin at the just-drilled (marked) holes and then using the old skin as a template drilled the the remaing right side holes. Got That? Our minds were a basket case!
We then reclecoed the new skin and match drilled to the frame and marked the holes to drill the firewall flange without the skin on to prevent messing up the skin. We unclecoed the skin and drilled the firewall flange. We deburred and dimpled all the ribs, subpanel, panel, and firewall flanges. Tommorrow, we will trim the right side of the skin, scuff, deburr, and dimple to prepare it for priming. It is time for Happy Hour!!!
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Clecoing new to old skin.
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Using old skin as a template to drill right side holes.
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Drilling stainless steel firewall flange.
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