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pattern making

Old 04-21-2002, 02:28 PM
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Default pattern making

Greetings,

I'd like to make a pattern for the ribs in one of my parkflyers. The wing is covered with transparent material, so I can clearly see the ribs, but I haven't been able to make a usable patter for copying these ribs.

I've tried using a compass to individually trace the upper and lower contours - but I've yet to make tracings accurate enough to be useful.

Any suggestions?

Thanks,

Tim
Old 04-21-2002, 06:30 PM
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Default Ribs from a model already built

A few suggestions...

> Obviously, if you have the plans, or can borrow some plans from someone else who has the same plane, you could trace them.

> Ask the manufacturer to do one of two things:
1. Send you a rib pattern (or a set of plans)
2. Ask the manufacturer what airfoil is used, then I, or someone else on this
forum could plot the pattern and send it to you

> Wait until you crash or otherwise damage the plane, so that you can re-create it from the damaged wing.

> Make an undersize pattern from cardboard, and keep trial-fitting it over the wing, and trimming it until it fits, then trace that.

> Guess. You can probably use one of many suitable model airfoils, based on an "eyeball" analysis of the airfoil on your existing plane.
Old 04-21-2002, 09:55 PM
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Default pattern making

Mike -

Great suggestions. Thanks for taking the time.

I read about your B200 project with great interest. Thanks for sharing that too.

Tim
Old 04-21-2002, 10:31 PM
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