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When your done testing your sub with the chamber Cliff, It looks like it would be a good start for a new hyperbaric sub project. ;)' Carsten, what type of seal is installed on the pressure chambers main removable head flange? Is it a lipped seal? I can't really make it out. I've seen a lot of large heavy scrap steel tubes of late, for about .25 cent's a pound or less. So perhaps one of us should make a PSUB's pressure test chamber here in the states for every one in the states that want to perform a unmanned pressure test on there subs with. I was working on a large locking ring hatch for making one head on a one person hyperbaric chamber, open to the outside. If I use that same basic configuration and scale it up for a sub pressure test chamber, it would save all that time of installing and then removing bolts. I like the idea of using a micophone inside the sub while under test. I had not heard of that before. Are you planning on doing another test after you replace the damaged valve? Regards, Brent Hartwig > Subject: Re: [PSUBS-MAILIST] Sgt.Peppers at 700 feet > From: MerlinSub@t-online.de > To: personal_submersibles@psubs.org > Date: Tue, 19 Feb 2008 15:54:00 +0000 > > Hi Cliff > > "Cliff Redus" <cliffordredus@sbcglobal.net> schrieb: > > > Very impressive Carsten both the successful test of Sgt. Pepper to 700 fsw and the pressure chamber. Can you tell us a some details on how the pressure test was conducted? > > Specifically: > > Did you use procedure from one of the classing organizations like ABS or Lloyd's? > > No class - just old iron from a scrapping place and a calculation and a pressure > test of the empty only water filled chamber. > > What are the chamber dimensions? > > Inside is 1500 mm diameter by 4000 mm length. > Chamber has 3 ts own weight by 16 mm thickness. > Water weight is 7 ts. 10 ts total. > > What is the maximum pressure the chamber is designed to operate at? > > 22 bars. > > Did you instrument the pressure hull with strain gages? > > No. we instrument the chamber with a videocamera and a very sensity microphone. > You can here if it drops into the sub - even single drops. > A microphone is very helpfull tool for leak test. > > How many simulated depth stations did you stop at and for how long? > > At 21 bars about 10 Minutes, during the manned test at 5 bars about 5 Minutes and at 10 bars only > a minute or so because one ball vale (the snorckel vale)was damage by ice overnight and leacking. > This small leak - a crack on the ball vale prevent to go deeper to 15 bars. :-( > We have allways problems in winter times with our boats. Last year during the lake deep test of > Nemo I we has also a ice broken ballvale. > > With this 700 fsw test, what will you set the maximum operating depth for the boat? > > 800 ? Smile.. no at the moment I would say 350 feet - 400 feet (100 -120 Meter) is okay. > > Can you send me the pressure chamber so I can test my boat! > > The pressure chamber has no propulsion, but your boat has - so you have to drive with the boat.. > > You are welcome - maybe at the Kiel Convention 2009 > > best regards Carsten > > Cliff > > > > > ----- Original Message ---- > From: "MerlinSub@t-online.de" <MerlinSub@t-online.de> > To: personal_submersibles@psubs.org > Sent: Monday, February 18, 2008 2:49:00 PM > Subject: [PSUBS-MAILIST] Sgt.Peppers at 700 feet > > Hi Submadmans, this weekend we drive to Berlin to our friends > of the Küster's family from the Nemo project and run the new > testchamber for psubs first time with a submarine inside. > > You can find the pictures at WWW.Euronaut.org under > "bygone projects" - the last fife pictures on the page. > > Thank you to all members of the weekend with a lot of adventures and fun: > Monika and Reinhard, Mirko and Claudia > Emile, Andre, Brian, Ramona and Charly. > > best regards Carsten > > > > ************************************************************************ > ************************************************************************ > ************************************************************************ > The personal submersibles mailing list complies with the US Federal > CAN-SPAM Act of 2003. 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