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Date:  4-19-2016
Number of Hours:  3.00
Manual Reference:  
Brief Description:  Lightening holes

Adding lightening holes to the spar webbing.

Marking out the exact locations before hand drilling the 1/4" pilot holes.

To avoid splintering I am cutting from both sides using the drill press with the stop set to NOT drill through the entire way.

Flip the spar over and finish off the holes.

Over 1/2 lb weight saving per wing.
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Pilot holes

Pilot holes

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Avoid splintering

Avoid splintering

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Finish

Finish

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