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Old Aug 24, 2014, 04:30 PM
Registered User
Joined Oct 2008
76 Posts
Hi Art,

I will scan my hole index so you can see where the second set of holes go...I need to find it first.

Happy flying and soft landings!

Sean
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Old Aug 26, 2014, 10:16 PM
Balsadustus Producerus
Escondido, CA USA
Joined Jan 2001
979 Posts
ser001--

The metal centerline indicator in my jig kit is made of steel, and measures .063 thick, by .504 wide by 3.3865 long, or about 1/2" wide and 3 3/8 long.
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Old Yesterday, 09:11 AM
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Joined Oct 2008
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Thanks a million Balsabird!
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Old Yesterday, 07:57 PM
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Canada, ON, Newmarket
Joined Jul 2013
54 Posts
Quote:
Originally Posted by Balsabird View Post
ser001--

The metal centerline indicator in my jig kit is made of steel, and measures .063 thick, by .504 wide by 3.3865 long, or about 1/2" wide and 3 3/8 long.
I recently dug out my full house A-Justo-Jig, after returning to the hobby after a pause of a couple of decades, prior to which I used the jig for perhaps 20 years.

It's still a great jig and here are a few comments based on my experience with it.

I've never used the metal centerline indicator; it's pretty easy to eyeball the wing centerline looking down on the jig and from where wing top and bottom spars from each wing half meet; also the indicator is a just a friction fit into a groove cut into wood dihedral box so its thickness should fit whatever width groove is cut; the other dimensions and whether it is wood,metal, or whatever are not critical.

the rib locators are pretty tough; I've never broke or chipped one

WinglessB's plans for the rib jig indexer are great and his thickening the clear plastic shield to something like 1/16" or more is an improvement over the original thin shield as I think a thicker lip around the two guide 5/32" anchoring rod holes 2" apart would give more guidance to a sharpened brass tube creating the holes in the balsa rib.
I extended my rib jig indexer to around 20" in length to accommodate some 16 or 17" ribs for quarter scale models.

Modern, small and cheap digital levels like the Tilt Box can set either the dihedral lines on the dihedral box or the dihedral setting for any specific wing easily and accurately.

You can build wing tip washout by incrementally altering the position of the rear hole in the ribs as they approach the wing tip.

My A-Justo-jig came with 26 rib locators and 4 fuselage former locators; plenty in my experience.

good luck,

Michael
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Old Yesterday, 10:35 PM
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Joined Oct 2008
76 Posts
High 2michaely,

Thanks for your responses. I just wanted to point out that I made a mistake in saying that the rib index locator was done by WinglessB. It was designed/created by Alpha35.

Happy flying and soft landings!

Sean
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