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Bob's RV-8 Build Site
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Date:  9-4-2017
Number of Hours:  2.80
Manual Reference:  
Brief Description:  Battery mount (cont)

So before starting to drill into parts that have taken so long to produce, I decided ot draw the parts to scale on a piece of graph paper. I felt that it would be very difficult to just try and rivet the -4 bolt nutplates to the rectangular tube mount itself so I decided to make a backing plate to go inside the tube and mount all the nutplates on the backing plates including the #8 nutplates that would hold the backing plate to the tubing.

I was able to work out all the dimensions and fabricated the backing plate. It will take a couple processes to get it complete. I drilled the backing plate in line with the tubing with the backing plate on top. Then I deburrd, countersunk the rivet holes and the screw holes. Next I will mount the backup plate into the tube and place the mounting angle on top to match drill the angle / tubing / and backup plate for the #4 hold down bolts.

Steady as she goes!
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Working it out on paper

Working it out on paper

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Transfer to mount tube

Transfer to mount tube

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Nutplate retaining plate

Nutplate retaining plate

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