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your comments on what I have is worth? Empty

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Post  roddie Thu Apr 23, 2020 7:03 pm

I have some triangular Baltic-Birch-Ply sticks.

your comments on what I have is worth? 20200124
your comments on what I have is worth? 20200125

A by-product (scrap) that I have continued access to at work. I mailed some to a fellow-CEF modeler, who is currently using "pieces" for gussetting a wing re-build.

I don't have any "weight" #'s for the stock.. but there are a few different configurations/# of plys; depending on the O/A thickness of the material. I could attempt to explain more in a PM/private message.

Thanks in advance, Smile

P.S. Two lengths glued-together to form "square-stock" (I have 24+ inch lengths) would make an incredibly strong wing-spar.. just sayin'


Last edited by roddie on Thu Apr 23, 2020 7:11 pm; edited 2 times in total (Reason for editing : P.S.)
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Post  NEW222 Thu Apr 23, 2020 8:42 pm

Well roddie, allow me to be the first to answer your question. What you have pictured there is honestly 'priceless'! They work absolutely perfect and were a very BIG help in the reconstruction phase of my Ultra Stick rebuild, both in reinforcing the wing, and many places in the fuselage. Also recently used them in my Mini Ultra Stick repairs too with great success.

I will though offer this. I was honestly skeptical at first using these over hand cut balsa traingle strips based on the material it is. I cannot say I officially know the weight difference, if any, but feel that these are much better as they are more of a 'hardwood', as well are laminated allowing me to feel better with a stronger reinforcement! Overall, even though I used them without worry, I do not personally think weight is an issue using them at all. Just smeared 2 of 3 sides with whatever glue I was using, clamp in place and allow to dry! Thanks!
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Post  NEW222 Thu Apr 23, 2020 8:55 pm

Ok, so after posting, I thought I should back up what my big mouth said earlier. And to say I was shocked at the results is an understatement! I did not think it would have been such a big difference! With that said, I will still stand behind them over their balsa counterparts.

6 1/2" pieces of each, close as possible to each other in cross section. Pictures show the proof. The pieces shown above of the Baltic Birch are definately more consistant. With that said the results are the following:
Baltic Birch is 2.7g per 6 1/2" length
Balsa is .3g per 6 1/2" length. So lets call it .4g per length due to the inconsistancy of cutting by hand and there is a small bit.
Combined, as seen on my scale shows correct.

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Post  roddie Sat Apr 25, 2020 11:02 am

Thanks for the replies Chancey! I'm not surprised with your results on the weight comparison with balsa-wood. The laminated Birch isn't something that you'd want to use extensively for air-frame reinforcement.. but its' strength-to-weight ratio in a triangular configuration make it ideal for the type of repair-work that you're doing. I'm glad that you've chosen to use some.. and hope that you get your models back in the air soon!

What I could do, is laminate two lengths together to form square-stock (essentially for a wing-spar type of application) and perform some sort of "break-test"??? Huh...

I should have waited to post about this material, until I figured out how to "present it" in a way that might be more useful. I forget that many modelers aren't into scratch-building.. and the few who are; don't tend to experiment with uncommon materials.

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