Quote:
Originally Posted by mark christopher
im told 3racing use a low quality titanium (as i said), which is brittle but cheap! and not suitable for our needs.
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As usual, Mark, you must be right and I must be wrong. Of course, everyone sells crap titanium that does not conform to the certificates they issue with it, and so it must be the material's fault. Absolutely no chance that they simply chose the wrong grade? What could I be thinking...
Anyway, since they also chose the wrong hex size, and then made it too deep, that's why they fail. And why would they do that (and they all do that?)? Because, whatever grade they choose, the correct size hex would be too small to take the drive from the allen key, as the material is too soft - it would easily deform. All Ti nuts and bolts used in aerospace have a 12-point star hex on them so it can take the drive to tighten them without deforming. The Corally screws seem to have quite a shallow hex by comparison, so I'm guessing that's why they work OK.
In 12th, Ti and aluminium screws work fine on low-load applications, but we don't use them to attach high-load-bearing parts, like T-bars and pods. HTH
