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Chuck Rowland - RV-8 Site
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Date:  2-4-2008
Number of Hours:  3.00
Manual Reference:  Section 7 - Wings
Brief Description:  Preparing the main spar - countersink spar flange

After looking at the different methods being used for countersinking the fuel tank attach holes in the spar flanges to accept the dimples in the fuel tank skin, I decided to go with Van's technique. I think Van's idea to use the nutplate as a guide for the countersink cutter is a pretty good one and should make this job go pretty quickly.

First thing to do was countersink the nutplate fasterner holes with a #40 cutter. I then primed the bare aluminum, then installed the nutplates.
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Nutplate fastener holes countersunk

Nutplate fastener holes countersunk

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Primed countersunk metal

Primed countersunk metal

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Nutplates installed.

Nutplates installed.

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