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Date:  12-24-2013
Number of Hours:  3.00
Manual Reference:  
Brief Description:  Drilling dimple relief countersinks in the spar

Drilled the skin relief countersinks for the skins in spar. I needed 3 different depths ... regular for rivets in spar to hold the ribs, deeper for the .025 skins, and deeper still for the 0.032 skins.

Made depth testers with scrap sheet, drilled and dimpled, then adjusted the countersink to get a snug fit to the spar with no play side to side.

Continued to dimple the ribs with substructure dies with the squeezer.
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Relief for skin dimples

Relief for skin dimples

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