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So how many times, for how long does a design need to be tested before it's considered ok in general by PSUBS.org? Do we go by the ABS testing requirements? Or ASME? You can always say well ya it worked for 1000 dives, but I won't even consider it until it's been on a dozen different boats for 20 years in all kinds of temperatures, and heavy use, and worked flawlessly as it was first conceived. If people only use the old stand bys we would stagnate, wouldn't we? Regards, Szybowski > Date: Mon, 7 Sep 2009 18:57:33 -0400 > From: jonw@psubs.org > To: personal_submersibles@psubs.org > Subject: Re: [PSUBS-MAILIST] No Machining Hatch Sealing Concept > > > Brent, > > You missed the point. > > At least part of your argument in favor of the "no machining" hatch > design was that Peter Madsen used it successfully. I brought up the > Seaker100 accident as an example that things don't necessarily go wrong > the first time, second time, or even third time you use something even > though the design is weak. Very much apples to apples. > > Jon > > > Brent wrote: > > >> *This accident comes up in interesting places. > >> **So lets compare apples to apples here please. > > * > Jon Wallace wrote: > > > > A perfect example of not depending upon the fact that you did > > something, to continue doing something, is the Seaker100 accident. > > They dove their sub successfully in the same configuration numerous > > times which led them to believe continuing to do so within the same > > parameters was safe. It wasn't. > > > > > > > ************************************************************************ > ************************************************************************ > ************************************************************************ > The personal submersibles mailing list complies with the US Federal > CAN-SPAM Act of 2003. Your email address appears in our database > because either you, or someone you know, requested you receive messages > from our organization. > > If you want to be removed from this mailing list simply click on the > link below or send a blank email message to: > removeme-personal_submersibles@psubs.org > > Removal of your email address from this mailing list occurs by an > automated process and should be complete within five minutes of > our server receiving your request. > > PSUBS.ORG > PO Box 53 > Weare, NH 03281 > 603-529-1100 > ************************************************************************ > ************************************************************************ > ************************************************************************ > |