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RV-7A Construction Log
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Date:  2-22-2009
Number of Hours:  1.00
Manual Reference:  
Brief Description:  Flaps - Bending the doubler 6.3 degrees

I loved the challenge to figure out how to bend the 706B double 6.3 degrees. I didn't want to bend it along its length. I wanted a bend at the defined line. So I clamped it in my big vice. Note I've replaced the steel jaws with oak wood. Then I used bar clamps and clamped another piece of oak on the outside also at the bend line. Then I used the leverage of the bar clamps to lift and bend the double. It did not require strength. I could feel the plastic deformation. Each give was about 3 degrees so with two lifts into the plastic deformation zone I achieved exactly 6.3 degrees. See photo of the protractor. I assembled the parts and they fit fine. Also I don't think 6.3 degrees is critical because there seems to be some elasticity in the parts that lets them line up as drilled.
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Using clamps to bend the doubler

Using clamps to bend the doubler

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Here is how I clamped it

Here is how I clamped it

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Amazing measurs 6.3 degrees.

Amazing measurs 6.3 degrees.

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