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The basic jigs, or fixtures concept for making rib rings for a model aircraft fuselage. A few notes about the process and how to keep urethane glue where you need it.
Another picture of the tools, glues, and other details about using the jigs, or fixtures to make fuselage foam rib rings while recycling foam drink cups.
Two examples of foam fuselage rib rings jigs, or fixtures I have found useful. The objective is very lightweight RC park flyer fuselages and these tools help make that possible.
A close up of a laminated fuselage rib ring and the Blu-core foam jig, or fixture I made to ensure the rib ring had the desired shape once the urethane glue had cured.
This pictures shows the butt joint of a fuselage rib ring and the color of (amber) urethane glue. The clear urethane glue is harder to show well in a photograph if the butt joint is tight.
I was making a laminated foam rib ring out of drink cup foam and if urethane glue is used sparingly, you can add the gap filling foam parts later without weakening the finished foam part.
Urethane glue cures best in the presence of water moisture and pieces of newspaper is a very cheap way to speed up the process and limit the glue bonding area.
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