Joe Graham's Online RV-7 Builder's Log
Building the Rudder Skeleton
After the rudder skins were fabicated, it was time to build the rudder sub-structure or "skeleton". The construction starts at the base of the rudder. The R-917 shim is first fabricated from a piece of aluminum stock. It's a simple piece to fabricate and there's a nice full-scale drawing to make sure your fab is correct. The shim is the same thickness as the forward flange of the bottom rudder rib. This provides a solid base for the R-405 rudder horn.
Here's the fabricated (but undrilled) shim.
And here it is in its proper position for match-drilling.
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All photos by Joe Graham unless otherwise noted