Building Tips and technical articles. > Building techniques

Wing jig

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Dan McEntee:

--- Quote from: Motorman on January 01, 2022, 04:36:35 PM ---The only advantage to using longer rods is you get to splice the spars and trailing edge with scarf joints instead of a butt joint. Not worth the extra expense imho.

Motorman 8)

--- End quote ---

     Definitely worth the extra expense when it comes to nice, clean joints that are stronger than butt joints. And you can build the wing farther along in one sitting with more pieces assembled to make the structure more rigid before removing from the jig, so it's a time saver.. If you plan on building a number of models, it's definitely worth a few extra bucks.

     HAPPY HOLIDAYS!
     Dan McEntee

john e. holliday:
   Remember using longer rods make sure no glue gets on them.   When the time comes a little twisting of the rods will help them pull out easier. H^^

Ken Culbertson:
I use 32" arrow shafts for my jigs.  Nice thing is that they have a threaded end where the arrowhead screws in.  The ones I have been getting are 8-32 threads.  A short piece of all thread and they make a 64" rod.

Ken

harold hogan:
Well, update...I found a local supplier that has 5/16th aluminum rod so I purchased 2 pieces 60 inches long. I think as long as I support the middle of the 2 rods, it should work great. Thanks for all the replies!

Harold

Ken Culbertson:

--- Quote from: harold hogan on January 06, 2022, 06:39:56 AM ---I think as long as I support the middle of the 2 rods, it should work great.

Harold

--- End quote ---
Absolutely, just don't make the same mistake I did.  When flipping the wing over to sheet the bottom LE one corner of the inboard wing was up so I weighted it down.  Actually what happened was my center support got a piece of scrap balsa under the front and I missed it.  Some warps just aren't removable.  Thanks to adjustable flaps it still flies well but not without days of tweaking and no amount of tweaking can overcome the effect of a warp at different speeds.  It just goes to show you that even after 60 years of building these things you can still make a rookie mistake.  I made two.  Take measurements EVERY time you take it off of the supports and put it back.

Ken

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