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Re: [PSUBS-MAILIST] Manipulator actuattion / design

Hi Hugh,
I'm late to mthe discussion, but have been following along as I will eventually be doing a hydraulic manipulator for my sub. I feel that the separate valves inside of the hull are not really necessary if some things are thought carefully first. I was planning on using the needed quick couplers on the inside of my thru-hull. These are normally closed hydraulic valves when disconnected. If there is a leak just disconnect the coupling. Also since I will only be able to go down to 1000 feet or less then 500 PSI and most any hydraulic system has capability of at least 2000 PSI it seems to me that it will be the strongest link of all the thru hulls. 

Just my opinion - What are your thoughts?

Best Regards,

Jim K
---- Original Message ----- From: "Hugh Fulton" <hc.fulton@gmail.com> 
To: <personal_submersibles@psubs.org>
Sent: Sunday, October 05, 2008 4:29 PM
Subject: RE: [PSUBS-MAILIST] Manipulator actuattion / design



Many thanks Jon,
Found that one. Noticed that there are a myriad of Tubes, well , at least 8 anyway that would all require separate internal lockoff valves but no quick 
release couplings.
Just as an aside we make quick release couplings for the CNG / NGV industry 
so if a car drives away while attached the hose pulls off with about 30kg
force. However a bit bulky and overkill for subs.
I am just doing the design of the controls for VBT,s MBT,s etc and trying to 
work out a redundant system that doesn't add a whole lot of extra
penetrators etc.  Also trying to fit in an Engine outside and the air from
outside back in thru the hull needs a 2" - 3" valve and with these things it looks a nightmare to have hulking great valves in an array thru the hull to 
meet ABS / Psubs safety stds.
Kittredge put some thought into it all. The more I look at his designs and 
simplicity yet compliance the more respect for the guy I have.  Regards,
Hugh



-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of jonw@psubs.org
Sent: 06 October 2008 05:04
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Manipulator actuattion / design


Hugh,

Dan Brewer built a hydraulic arm for his sub.  Photos are available on the
web site under the 2007 convention. While I didn't get a chance to talk to Dan about it, I know some folks on the list did. They (or Dan) can probably 
provide some details.

Jon


-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of Hugh Fulton
Sent: Saturday, October 04, 2008 7:51 PM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Manipulator actuattion / design
Phil, Where can we get info on the dump mechanism. Sounds a must. Also any 
places to see a simple manipulator design?  Hugh





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