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Fuselage Fabrication 5

AlRice

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<div style="text-align: center;" align="center">Finish Welding the Fuselage

General Suggestions

  1. While
    the fuselage is still upside down on your table, and with the tailpost securely
    in its jig to hold it vertical, finish weld from stations 168 to 137 as
    much as possible.
  2. Weld
    the ‘easy’ side of a cluster first starting and finishing as far around
    the tube as possible. This will
    make it easier to finish up the ‘hard’ side of the cluster.
  3. Start
    at the rear and weld toward the firewall, progressing in a spiral pattern.
  4. Do not
    weld in the top half of the tailpost.
    It will get in the way.
  5. Build
    a rotating stand like the one in Tony Bingelis’ book Sportplane
    Construction Techniques,
    pg 69.
  6. Always
    keep your body and hands in as comfortable position as possible while
    welding.



20061113_165237_StandFr&


Finish welding the fuselage took me about 45 hours. Being able to position the fuselage in every
possible position is essential to making quality welds. This is the front mount of my stand. It is made of 2x4’s with a pivot tube welded
to a steel plate bolted to the 2x4 crosspiece.
The vertical stands are also made of 2x4’s with a hole for the pivot
tube drilled (holesaw) 40” above the ground.



20061113_165300_StandRearPivot.JPG


The rear mount is much different from the Bingelis
drawing. I split a tube that clamps over
the tailpost and welded half of the clamp tube to the rear pivot tube. Some duct tape keeps the clamp tube from
slipping on the tailpost. The rear
vertical stand is also drilled at 40”. Notice
the 3/8” slot cut in the 2x4 from the hole to the top. This allows the 2x4 to be squeezed providing
friction to hold the fuselage in any position.


20061113_165339_FinishWelding.JPG


The rotating stand allows you to weld from inside and
outside the fuse. Keeping your body
stable and comfortable adds to the weld quality.



 

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