Mystery Build thread

Discussion in 'Plane Registry' started by david010567, Jul 31, 2011.

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  1. Aug 1, 2011 #21

    david010567

    david010567

    david010567

    aka Schlawiener

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    Foam cutting router would be cool eh?

    <iframe width="425" height="349" src="http://www.youtube.com/embed/ME0WgH-AAdc" frameborder="0" allowfullscreen></iframe>
     
  2. Aug 1, 2011 #22

    Mithrandir

    Mithrandir

    Mithrandir

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    .028" safety wire works really well....

    it is what we use on our foam cutters.....

    and cheap!!

    I have cut hundreds of foam cores....
     
  3. Aug 1, 2011 #23

    david010567

    david010567

    david010567

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    Thanks Mith... Gonna have to get me some of that. I also want to try .016 Stainless Steel fishing leader wire. I hear it's real good on the longer 48"+ cuts. I'm only pushing 2 amps so adjustments in wire thickness might be needed.

    Now that I have the power unit with banana jacks, fuse, etc... I can play with all kinds of configurations. Should have done this years ago!
     
  4. Aug 1, 2011 #24

    david010567

    david010567

    david010567

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    Here is a pretty simple table top design. I would like to have adjustable pulleys though or maybe just drill more holes about every 1/2" on center. If you add some weight to the swing arm it becomes fully automated. Just stand back and watch it cut.
     

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  5. Aug 1, 2011 #25

    david010567

    david010567

    david010567

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    I'm pretty sure I could pop rivet a tape measure to the channels and come up with a simple software program for the roller locations. This way the entry and exit cuts on both ends of tapered wings happen at the same time. Beats having two people, one being a caller at each station line of the airfoil like they did it in the old days. What ya think Mith?
     
  6. Aug 1, 2011 #26

    david010567

    david010567

    david010567

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    Never mind... Here's a proven design and plans from RC Soaring Digest for the cutting bow and Automator. Each mark on the swing arm of the Automator represents 1% of the chord. Simple calculation of of the smaller chord divided by the larger chord gives you the percent to clip the wires to the swing arm.
     

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