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Jon, This gage if I remember him correctly was used to give an accurate depth reading while the u-boat was at periscope depth. An isolation valve was shut near the boats hull when the vessel when deeper. It is scenically a shallow water depth gage. It is the curvature of the water surface within this thin tube that gives an early indication of direction the boat will travel. David Bartsch > Date: Thu, 11 Mar 2010 09:27:21 -0500 > From: jonw@psubs.org > To: personal_submersibles@psubs.org > Subject: Re: [PSUBS-MAILIST] Papenberg Depth Gauge #4 > > > It would be a good reference to have under the "Projects and Photos" > section of the website, and will be easier to find later than searching > through the email archive. You can sequence your illustrations and add > detailed descriptions. For what its worth, I found the posts up until > #4, to be lacking enough detail to comment on. It probably would have > been better if you started with the overall sketch and then showed the > details in subsequent posts. I don't think email lends itself well to > that kind of "instructional" format whereas the website does. > > The unit you are describing is very similar to what we call a "water > level" in the States. Similar configurations using large lengths of > hose can be use to find "level" over long distances. The primary > question I would ask if I were to build one would be what is the > internal PSI rating of the glass tube and where do you find that > information. Also, is the depth indication (graduations) as shown by > the water column linear, or does it vary as the air bubble is compressed? > > Jon > > > > Jens Laland wrote: > > Unfortunately, I see no sense in continuing this diy description here on > > the list, as it appears no one give a toss about it anyway. > > > > > > > ************************************************************************ > ************************************************************************ > ************************************************************************ > 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 > ************************************************************************ > ************************************************************************ > ************************************************************************ > Your E-mail and More On-the-Go. Get Windows Live Hotmail Free. Sign up now. |