While doing a bit of net surfing today, I ran across some structural tests on the adhesive that I am using, Titebond III.
On balance, all the test results were not conclusive either way. But "not conclusive either way" is not good enough for an airplane.
So, I will be changing adhesives. It appears that there is little choice but to move to T-88, an epoxy adhesive with all the strengths, and difficulties, of epoxy. It also means that I will scrapping the ribs I have built so far.
Bummer.
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