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Post  batjac Tue Oct 01, 2024 12:37 am

I got a Carl Goldberg Swordsman 18 at the Reeves Memorial Stunt Contest this weekend.  I just opened it up and measured the wing.  IT’S NOT 18 INCHES!!!!  The wingspan is only 17 5/8”!  I was robbed!!!

The Precise Mark
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Post  GallopingGhostler Tue Oct 01, 2024 2:24 am

Mark, 17.625 inches (448 mm) is 18 inches rounded up. Is your kit the Goldberg original or is a retro by another?

I'm away so can't measure, but when I am able to, will check my Goldberg original.
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Post  gkamysz Tue Oct 01, 2024 8:25 am

Actually, I worry distortion in about scanned plans.  Not that it's enough to matter in most cases. I was recently working with the BeeTween plans from outerzone and found some discrepancies, I think the elevator was 1/16" or 1/8" asymmetric or the like, but this must have been a drawing error. Anyway when you're crazy like me and work in .0001" often, this stuff bothers me a bit.

Why was I playing with Bee Tween plans? I think I need a WeeTween at about 80% of original with, you guessed it, PeeWee power.. Maybe even a VeeTween with a V tail? I'll probably go with a stick fuselage and control surfaces.

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Post  batjac Tue Oct 01, 2024 6:53 pm

GallopingGhostler wrote: Is your kit the Goldberg original or is a retro by another?

It was a still sealed-in-plastic Carl Goldberg kit.

The Fantastic Mark
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Post  GallopingGhostler Tue Oct 01, 2024 9:25 pm

batjac wrote:It was a still sealed-in-plastic Carl Goldberg kit. The Fantastic Mark
I think you found your answer, Mark. Cool Makes sense. Die cutting a wing with tips from half a sheet of 36" standard stock balsa sheet to give 2 wings would need a little left over overhang for clean tips. So, 3/16" for clamping the balsa edge for the die gives a slightly shorter wing.

That would be my best guess from the manufacturing process.

The Fudgemeister Jorge. Eyebrows Check with own eyes Popcorn lol!
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Post  batjac Wed Oct 02, 2024 10:35 pm

Well, that might be a good surmise for an older kit. But this is one of the later kits that were laser cut. Should be no errors if the laser settings were correct. So I'm going with the Goldberg company having a personal vendetta against me....

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Post  roddie Fri Oct 04, 2024 11:27 am

You weren't cheated Mark..

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Post  GallopingGhostler Yesterday at 2:06 pm

Roddie, ditto. Wink
Compared with an old 18 inch square:
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Wingtip up close:

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Mark, fact confirmed by 2 witnesses, Your measurement of 17.625 inches is correct. I Love This Forum!
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