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Jim Cobb wrote: > > On 1/19/98 8:21 PM Thomas A. Easop wrote: > > >G. Irvine wrote: > >> > >> Wings with bungees are ridiculous- they will exert pressure against the > >> inflation, and cause the opv to dump well below what the ambient > >> pressure would. > > > >As long as the force on the wings created by the bungee is LESS than that > >of the spring in the over preasure > >relief valve then they will inflate just a hair less than all the way > >before the valve is activated, not 'well > >below what the ambient preasure would'. The force of the bungee is key. It > >can be checked by fully inflating > >the wing before suiting up and seeing how fully inflated it gets before > >the valve goes. > > How come they did not work, is all their double-redundant glory in this > case? I'll tell you why, they are a fundamentally flawed design. With all the bondage wings being used successfully by all us strokes it would seem that 'fundamentally flawed design' is not it. Personally, since I was not on this ill fated dive (and niether where you), my GUESS is that the student was simply overwieghted. (The rumor of his physical state of exhaustion after a previous dive is supportive.) They honestly should have identified this as a lethal problem early in the dive, while swimming to the barges, given what the 'official press release' says. In the end, the wings gave there all, but it was not enough. That started the CF and nothing the others did could correct it. It could have been easy to spot a stuck open dump valve and correct it quickly. Same for too tight bungies on the wing. But judging by their solution, using dive partners for lift indicates to me that they knew the student was just too heavy. Time and breathing rate got the best of him, and the others. No one has yet said they were a 'glorious' set of double bladders. If there was a leak problem, they would have saved the day. Being I believe it was a question of enough bouyancey capacity, an extra bladder could not help. <snip> > >> There is also the problem of two inflators on some of these, a real > >> boondoggle . You can immagine the degree of clustery that get set up > >> with that arrangement. > > > >If done right its no cluster at all. > > What if they are not done right, someone dies? Yes, and who's fault is it? An open water diver clips an octopus to his 'vest' so securely he can't get to it. Done wrong? Aha. Does he die? Very possible. The device's fault? No. What do you call equipment > which is easily rigged wrong? "For experienced users only" Seen any 3-wheeled off road vehicles > lately? They worked great if they were ridden right. Same problem, bad > design, poor human engineering, profit motive overriding good > engineering. Say, did'nt they get sued out of existence due to too many > fatalities? Almost took down some huge companies down with them, as I > recall. Not to mention the poor bastards who broke their necks on them. Well, I do mine right, all the time. I've never been on one of those three wheelers, becuase I can sense what is FAS and what is not. These guys with broken necks only have themselves to blame. Profit motive is alive and well in the good o'l USA, I guess thats why they broke these companies that way instead of the smart way, buying the safer ride and letting the compition get them. > Wake up Easop and sell your stuperwings before you can't get $10 for them. Don't worry Cobb, I'm not selling mine. Well, maybe. I would like a set that have less lift - thats all. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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