Drilled Rudder Stiffeners

I finished deburring the rudder stiffeners and drilled them to the skins.



The rudder stiffeners have a slight bow to them as they come from vans.  This would create a slight concavity in the rudder skin, so I slightly fluted the stiffeners to make them lay flat.  They had to be fluted on both faces since the flutes to pull the stiffeners flat also pulled the holes out of line.  Fluting between the holes pulled them back in line, but typically bows the stiffener slightly so it doesn't lay flat anymore.  Definitely an iterative process, but by the end they were only taking me a couple of minutes per stiffener.