07-23-2019, 05:14 PM
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Mad for modrocs
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Join Date: May 2019
Location: Chapel Hill, NC
Posts: 71
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Quote:
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Originally Posted by astronwolf
Are you trying to build one of Guppy Youngren's R/Gs? There may be other plans that use it, but mentioning the use of monofilament to reinforce the leading edge of a wing - in a model rocketry context - reminded me of that plan.
http://georgesrockets.com/GRP/GLIDE...IT-Scans223.jpg
If you examine plans from those days, they seemed to favor replacing the leading edge of the wing with strip of hard balsa or spruce. I think this wasn't done to just toughen up the leading edge of the wing. It would make sanding a nicely shaped leading edge into the wing easier.
The monofilament might have been experimenting with a turbulator on a low drag airfoil. I can't imagine a thin little line of monofilament "reinforcing" anything. It certainly worked - he set a world and national record with that wing. |
Not specifically Guppy's, but I've seen several early glider models that used monofilament attached to the LE (for example the Longhorn-16 BG by Tony Williams: http://www.oldrocketplans.com/narco...RN-16_PLANS.PDF) whose function, I gathered, was to strengthen and protect the wing's leading edge. I've also seen HLG/DLG-type free flight models that employ a hard balsa or basswood LE, and honestly the monofilament seemed a much easier solution for my limited crafting skills.
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