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Zenith CruZer & Sonex Logs
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Date: 4-22-2018
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Number of Hours: 1.10
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Manual Reference: C7t-WA-2
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Brief Description: Cleco nose rib skins in place for drilling main sp
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This was more challenging than I would have thought.
The guide says to use ratchet straps and a 1x2" board to fold the nose rib skin into place for cleco'ing. Tried this several times with the 1x2 where I thought it would do the most good. I could NOT get the amount of pull in order to get the holes lined up.
Finally, I placed the board on the lower side of the leading edge, and cranked the snot out of the straps. I seriously thought the straps would shear, but finally after one more click on each strap, the holes lined up. Plans say put a cleco in EVERY nose rib hole, so I did.
Moving to the outer skin with the new knowledge in hand, I positioned the straps and got the holes to line up well enough to cleco. Again, a cleco in every hole.
Lastly, I installed the aft upper skin (remember - I previously riveted the L-angle stiffeners in place) and cleco'd just enough to line 'em up and keep it from sliding. More cleco's to follow.
The order is a bit different from final assembly, since the pilot holes for the main spar are only in the aft skin. As a result, the hole-less nose skins get placed first, THEN the aft skin, so that the builder can drill thru the aft skin (sized at #40) thru the nose skin, and into the main spar. These holes (a bunch of 'em) are then progressively up-drilled to #30, and finally #20 in prep for an A5 rivet. Once drilled, all is disassembled, deburred, then RE-assembled with nose skin on top, and riveted.
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Inner skiin cleco'd
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both skins cleco'd
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aft skin just set in place
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