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  • #31
    First half of the center ribs have their lightening holes flanged.




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    Last edited by Chris In Milwaukee; 03-04-2016, 08:13 AM.
    Christopher Owens
    Bearhawk 4-Place Scratch Built, Plans 991
    Bearhawk Patrol Scratch Built, Plans P313
    Germantown, Wisconsin, USA

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    • #32
      Wrapped up the center rib lightening holes today. Looking fabulous.





      Also started the small stuff. I opted to go with the flap nose ribs next. The press is large enough now, and the parts are small enough, that I was able to do two at a time.







      The rubber mats I'm using don't flow well around the small parts, so I had to massage them a little bit.



      So off to the good ol' trusty Vans rib straightener.









      Good to go! Ready to move to aileron nose and pockets.


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      Christopher Owens
      Bearhawk 4-Place Scratch Built, Plans 991
      Bearhawk Patrol Scratch Built, Plans P313
      Germantown, Wisconsin, USA

      Comment


      • #33
        Same technique for the aileron nose ribs.












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        Christopher Owens
        Bearhawk 4-Place Scratch Built, Plans 991
        Bearhawk Patrol Scratch Built, Plans P313
        Germantown, Wisconsin, USA

        Comment


        • #34
          Well, this is the last of the little guys. Aileron pocket ribs are wrapped up. Like the others, I was able to press both sides at the same time.





          Because of the inside radius, I couldn't use the Vans method. So I broke out my seaming pliers and my lineman's pliers and did them that way.





          What to do next? Oh yes, full-length ribs. Have to create the routing form for them, cut them out, and then flange them.


          Sent from my iPhone using Tapatalk
          Christopher Owens
          Bearhawk 4-Place Scratch Built, Plans 991
          Bearhawk Patrol Scratch Built, Plans P313
          Germantown, Wisconsin, USA

          Comment


          • #35
            On the vans rib straightener did you go with the same 11deg angle as the vans guys or did you find something better? I am going to knock one up tomorrow and was planning on going with 11deg.
            Steve Nicholson
            Lafayette, LA

            4 Place Scratch build #1377 in progress (Wings)

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            • #36
              Sure did. 11 degrees works perfectly.
              Christopher Owens
              Bearhawk 4-Place Scratch Built, Plans 991
              Bearhawk Patrol Scratch Built, Plans P313
              Germantown, Wisconsin, USA

              Comment


              • #37
                So finally got the last of everything cut and lightening holes flanges today. The full-length ribs were the last to be done. They hadn't yet been cut out because I hadn't made the routing jig yet. So I picked up a new sheet of MDF, traced the master routing template onto it, and cut/routed out a pair of routing jigs.





                Got the aluminum roughs loaded up and ready to go, and then routed them out. Amazing how quick and easy two sheets goes than ten!







                Probably should have thought twice about routing these things while wearing a fleece. Going to take a while to pick the shavings out of it.



                Got them in the press to flange the lightening holes, wrapping up all the lightening hole adventures.



                Time to move on to edge flanging.


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                Christopher Owens
                Bearhawk 4-Place Scratch Built, Plans 991
                Bearhawk Patrol Scratch Built, Plans P313
                Germantown, Wisconsin, USA

                Comment

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