Your post lacks a basic understanding on two points.
1: The BR loop that mounts to the fastener has a swivel, so, from an engineering point of view, entirely negating your point.
2: The OP did not have the hypothetical issue you talk about, the screw unscrewing, he said "I have no idea how it got out of the locked loop"
BR swivel huh? And that swivel is designed that it can never ever bind from something, say, like the camera swinging to one side or the other causing a side force on the swivel portion?
That POS swivel cannot dependably negate anything, let alone my arguments. I think finding that swivel was the point when I lost all interest in BR products, it just looks cheesy and lame to my experienced mechanic's vision. No way I'm depending on that thing to secure my camera, you may, of course, proceed as you wish.
Correct, the OP hasn't stated which point failed. Seems to me likely that either the screw came loose, or the vaunted swivel failed or both.
Whatever the cause, he was using a BR strap, his camera fell, something failed.
If it turns out that it was indeed operator error, that points back to BR engineering for not thoroughly "Idiot Proofing" (no offence intended) their designs.
Idiot Proofing should be part of all best engineering practices. An engineer must look at their work, think up ways that an end user might possibly err and design around those possibilities. The best consumer products are always "Curse Proof" and "Idiot Proof".
...Consider that among camera manufacturing company staff, there are also those who specialize in sales and marketing - and their decisions usually trump the engineers and designers. No engineering idea for a carrying strap attachment, no matter how structurally sound, would be allowed to see the light of day if it resulted in the camera – and its logo – hanging upside down behind the owner, rather than upright and proudly facing forward for the world full of potential buyers to see.
Give those marketeers credit for considering a plethora of conditions prior to a product reaching our hands, give them credit for knowing and being relatively expert about a whole lot of things the consumer public never thinks about but gets them to buy cameras anyway. .....
This one is really too much hot air Neuro, really.
If marketing thought inverted carry solutions would help sell cameras, we would have seem them long ago. Except, engineering likely put the kibosh on such ideas. Sure I can't say for sure, I'm not a camera engineer, I can only see what marketing has released.
No complex reasoning needed at all to imagine double brand logos, one inverted, if inverted carry was sound.
Gee, what do your brilliant sales guys think when an end user mounts the O.E. strap backwards?
Logos on my 6D straps all face the same way, what was Canon Sales thinking? One Nikon strap has opposing Logos, the other Nikon and my Pentax have a single, centered Logo, if the camera is behind, strap logo is to the front though it could end up upside down.
Neuro, these Sales/Marketing comments of yours are just a lot of blah, blah, blah. I truly wish you would have saved the keystrokes you applied in yet another mighty effort of yours to denigrate another CR member, saved me the keystrokes of replying. Sometimes I think you just like seeing your sarcastic excellence in text.
Lately, it seems only a small percentage of your posts demonstrate the depth of your most enviable knowledge and experience, a much larger percentage appear arrogantly negative for the sole purpose of being negative.
Yes, I did post...
......Neuro, I'm expecting a sarcastic critique of this post from you, please, stifle it.......
And I changed the font color to white so that it would not be readily apparent on the board but only show if/when one began a reply.
Your sarcastic critique came through anyway, I do not thank you for your demonstrated lack of respect.
I want to state that it appears you just can't help yourself when it comes to posting your negativity. Better if I ask you to ask yourself if maybe you can find a way to help yourself stifle your negativity?
Your technical posts are truly marvelous and amazing, real internet gems. Must you counter those gems so negatively? Do you get off on the strangely congratulatory posts to the effect of "Yay! Neuro PWNs another noob"?
...As I've stated before, with the AS-type clamp attached to the BR lug, I don't worry and don't need to check anything......
Um, er, as you've stated before.........
....Personally, I attach a FastenR-3 to a Kirk 1" clamp (QRC-1) with Loctite for each of my BR straps. .....
That you have determined the need for the use of Loctite on your BR straps is a clear and unequivocal indication that you have recognized a basic design shortcoming and applied Loctite as a partial at best kludge work around of that short coming.
Neither you, I or anyone else needs an engineering degree to come to this conclusion.
.......After a long diatribe about engineering, implying that you know more than the engineers who designed the tripod socket-based carrying straps,......
Not at all my implication.
My implication is that there are indeed mechanical engineers applying their skills and knowledge to the Camera Manufacturers' and consumers' benefit.
I do question whether the yayhoos that design BR type straps are engineers at all, their products indicate to me that they are little more than tinkerers.
You yourself have found need to tweak these lame designs.
....If a randomly applied rotational force is applied to screw threads, the probability of that force being applied in the direction that tightens the screw is equal to the probability of it being applied in the direction that loosens the thread. You might want to look up the definition of "random."
Did that look up.
---"ran·dom (rndm)adj.1. Having no specific pattern, purpose, or objective: random movements. See Synonyms at chance.2. Mathematics & Statistics Of or relating to a type of circumstance or event that is described by a probability distribution.3. Of or relating to an event in which all outcomes are equally likely, as in the testing of a blood sample for the presence of a substance."
Definition 3 does not apply here.
It, and apparently Neuro, would imply that straps, cables, ropes, hair and such could never twist or tangle as each twisting or tangling force would be countered by an equal but opposite force.
See the comments above regarding red/black random chance at roulette.
I'm going with definition 1 here, random being unpredictable.
Photogs whose BR straps have never loosened are the ones that experienced the clockwise forces as dominant, the anti clockwise crowd either caught the effects in progress or dropped expensive gear, that fits with definition 3. You get your 50/50 distribution, just not in the same place.
.....I felt just as if the camera had come loose from its strap, I was also randomly screwed.
Let me see if I can improve on this thought.
BR straps and the like belong over in the Useless Accessories thread, better, a new thread titled, "Worse Than Useless Accessories, Beware, Catastrophic Failures Have been Reported ".
Really, it's not as though this thread is the first ever mention of one of this type carry system's failure.
While they are likely out there, I don't recall ever seeing a report of an O.E. style strap failing, and even if, an O.E. style strap is only likely to fail due to extreme wear and continued use under an extremely worn condition qualifies as Operator Error, or operator error during assembly.