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Re: [PSUBS-MAILIST] For Chris Gillis's sub project



Hi Chris.
 
You wrote..."ANOTHER EXAMPLE OF PRIMARY AND SECONDARY SYSTEMS, IS  GPS / NAV SYSTEM.  IN THEORY,  IDEALLY THE SSX WILL BE EQUIPPED WITH A GOLBAL STAR SAT PHONE (PRIMARY GPS RECIEVER), AS WELL AS A HAND HELD GPS UNIT (BACK UP).  ALSO, WHILE THE PRIMARY MEANS OF COMMUNICATIONS WILL BE HAND HELD WALKIE TALKIES,  THE GLOBAL STAR SAT PHONE WILLSERVE DURAL PURPOSES.  IT WILL BE USED AS THE PRIMARY TRANSMITTER / RECIVER FOR THE NAVY LAPTOP WHICH'S FUNCTION WILL BE NAVIGATION, BUT WILL ALSO SERVE AS THE CARRIER MODEM FOR THE LAPTOP TO USE CHAT WITH THE SURFACE SUPPORT VESSEL.  IN THIS RESPECT THE SAT PHONE WILL BE SERVING A DURAL PURPOSE, BOTH AS THE GPS RECIVER, AND AS THE MODEM FOR COMMUNICATION FOR THE LAPTOP. "
 
Your "walkie talkies" as well as your sat phone would have to be microwave transmission and reception to be able to travel thru the water wouldn't they?  You were not talking about using standard walkies and a sat phone were you?
 
You wrote...NO MATTER HOW MANY FAIL SAFES ARE DEVISED, AND HOW MANY PLANS ARE FORMUALTED, HUMAN LIFE WILL ALWAYS BE THE FIRST PRIORITY, AND FOR THAT REASON, SCUTTLING THE SSX WILL ALWAYS BE THE FIRST OPTION.  TO THAT END, AN ESCAPE HATCH WILL BE BUILT AT THE FORWARD BOTTOM SECTION FO THE PRIMARY HULL.

IN THE EVENT THAT THE SSX MUST BE ADABDONED, AND THE CREW ARE FORCED TO MAKE AN EMERGENCY EGRESS WHILE SUBMURGED WITH LITTLE OR NO SURFACE HELP,  THE SSX CREW WILL BE FORCED TO USE SCUBA GEAR AS A MEANS OF REACHING THE SURFACE.

SCUBA IS WITHOUT A DOUBT THE MOST EFFECIENT MEANS OF ESCAPE FROM THE SSX IN THE EVENT OF A TOTAL EMERGENCY AND CAN EASILY BE DONNED.   THIS HOWVER, IS NOT WITHOUT RISK IN ITSELF, DUE TO THE EFFECTS OF DECOMPRESSION.  ALSO, DUE TO LEAVING THE COMPRESSED CONFINES OF SSX AND ENTERING THE SEA WILL PRESENT A RISK.   THE FINAL RISK, INVOLVES THE USAGE OF SCUBA GEAR BY THE CREW OF SSX WITHOUT ANY TRAINING.

TO MITIGATE THESE RISK, ALL CREW MEMBERS OF SSX WILL BE VERESED IN THE PROCEDURES OF PROPERLY USING SCUBA GEAR.  THOUGH IT WILL BE USED IN ONLY DURING AN EMERGENCY WHEN ALL OTHER OPTIONS HAS BEEN EXHUSTED.  TO CUT DOWN ON THE RISK OF PRSSURE CHANGES, TABLE WILL HAVE TO BE DEVISED THAT WILL SHOW HOW TO DEPART FROM THE SSX SAFELY.
 
I think I would make scuttling your sub my last, not first option. You could make the sub slightly buoyant and have a detachable weight that kept it neutrally buoyant so that in case of an emergency you could drop the weight and the sub would auto surface.
You are going to build an escape hatch at the forward bottom. Since you would have to equalize the pressure within the sub to the outside water pressure to open the hatch, why not plan on an emergency system of using air pressure within the sub to keep the water out as in an ambient open bottom sub and then just have small "pony bottle" also known as "bailout bottles" for each crew member that has the mouthpiece built right onto the bottle that you hold as you surface. This would keep your sub from flooding for you to recover later. If your sub was at one atmosphere before you decided to "bailout" and you pressurize it's interior to equal the outside water pressure in order to open the hatch, you will be pressurizing the crew's bodies to the same pressure as they would be if they were outside at that depth. If, (IF being the keyword here) they would not be pressurized at depth pressure for very long but just long enough to equalize the interior to the outside pressure they would not really have time for nitrogen to build up in their systems and they could accend SLOWLY to the surface without fear of getting the bends. If the crew is subjected to depth pressure for a longer length of time, they would need to decompress before surfacing and you might want to have a nitrox gas mix with more oxygen (possibly pure oxygen) in it for them to breath on the way up. Also you would probably need more air for them to have sufficient time to decompress than a bailout bottle holds. It would all depend on how long they were pressurized above 1 atmosphere. If their pressure time was
short the bailout bottles should suffice and are a lot better than the old momson lung type of rigs and don't take up as much space as a full scuba rig would.
 
You wrote...POWER SUPPLY:
Though no one power source has been idenified, the most looked at srouce will be a regular maritime boat battery, which will be stored in a dry container such as a modified cooler.
 
Why not just house your batteries in your  tubular skids on the model I saw? Your bottom skids looked a lot like round pontoons or pvc pipes. Just house the batteries there keeping your weight low so your sub will be stable. I noticed side tubes on your model and you
could use these for ballast tanks as long as your weight was BELOW them. You never want your buoyancy low or else you might turn over.
 
I'm no expert but I am building a wetsub of my own (with lots of advice from here) and am a certified scuba diver. Hope I was of some help.
 
Kindest Regards,
Bill Akins.  

 
 
----- Original Message -----
Sent: Thursday, February 17, 2005 11:28 PM
Subject: [PSUBS-MAILIST] Website

To whom it may concern, and is interested.

I have recently created a website for a planned submarine that several
friends and myself has been planning to build. 

There is not much there, but would like some peoples feed back on what
content is there. Plus I am updating it daily so there is always something
that is getting put in.   Also, our group has several other projects we are
working on that is listed in the website if anyone is interested in reading
it.

Please let me know what you think, and anything you think I should change.
Constructive Criticism is greatly appreciated.

http://www.geocities.com/zuriels_fire/SSX01page.html

-Christopher Gillis
Operations Specialist
United States Navy