boku wrote:
j_ung wrote:
...The simple truth is that Aliens are suspect unless tested individually, in controlled circumstances, in a drop tower, by somebody more competent than CCH...
I disagree with that in a minor way: From the failure modes so far observed, I believe that the dynamic properties of the device are not in question. I believe that static testing should be adequate to tell good Aliens from bad ones.
If the problems related to fatigue failures or to cam lobes slipping or skipping or other jitters, then I'd agree that dynamic testing is called for. But so far all of the known failures seem to relate to simple overload of either the cable-to-head joint or the stem loop swage. That being the case, I don't think that a slow controlled pull will show any different result than a fast dynamic pull. I think that all that matters here is the maximum tension applied to the stem.
Which of course raises the question, why couldn't the static testing done by CCH tell them apart? Unfortunately, I don't have a good answer for that, only speculation. And there's been plenty of that already.
Bob "BoKu" K.
