Talk:Pitometer log

=Page Work Needed=

Needed Additional Content

 * A figure illustrating the manometer-based pitometer.
 * Some information on pitometer accuracy
 * I have not defined the variables in the equations.

Stylistic Work

 * There are several articles that should come from this. For example, there should be articles on CVL, patent log, etc. I am not sure this is the place for a survey discussion.
 * Once the other articles are done, the survey discussion here should be replaced with some wiki-reference.

blacksheep 12:48, 31 August 2006 (UTC)

Need for a new article 'Log (speed)'
There is need for a new stand-alone Log (speed) page, which I am starting in my sandbox. This page originates from the fact that there are two Wiki pages this one, Pitometer Log and Chip Log that both contain large, overlapping sections on the history of and other technologies of knot logs (and poorly sourced at that) but there is no comprehensive page for the history and development of the knot logs as a whole.

I am combining the extraneous material from those two pages into one new page, organizing it into sections, linking back to these two pages, providing sources, in-line citations as best I can. I plan to remove that extraneous material from this page and the Chip Log pages when I am done. Take a look at what I've got so far in my Sandbox and let me know what I can do to improve it. In particular I need help from anyone who might know more about the subject than me who has access to some high quality sources for some of these factoids, or want to start hacking away at it. Atani (talk) 05:35, 28 June 2012 (UTC)--Atani (talk) 04:36, 28 June 2012 (UTC)

Illustration is flawed
The illustration https://en.wikipedia.org/wiki/File:Manometer.png is wrong in detail. The pit sword extends downward from the ship's hull far enough to get clear of hull-induced flow changes, and the water flows across it, not along its length. The static port opens at the end of the sword so that the water flows across it; and the dynamic port is on the forward edge, facing into the flow. This illustration http://www.hnsa.org/doc/fleetsub/log/chap2.htm#fig2-04 should clear up things. Dbeierl (talk) 19:05, 13 April 2014 (UTC)
 * The opening facing the water flow measures TOTAL pressure. The STATIC pressure is substracted to get DYNAMIC pressure. The latter is the measure of the speed. By substracting the static pressure, differences in density of the medium are taken into account. This is correctly portrayed in the technology section, but not in principles of operation. Fox  260   10:43, 30 June 2014 (UTC)

External links modified
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 * Added archive https://web.archive.org/web/20060905214736/https://navy.rotc.psu.edu/NROTC%20Classes/203/notes/Lesson05/lesson05.doc to https://navy.rotc.psu.edu/NROTC%20Classes/203/notes/Lesson05/lesson05.doc
 * Added archive https://web.archive.org/web/20060923212721/http://www.marine-acoustics.co.uk/Technical%20Papers/hsluust1999.pdf to http://www.marine-acoustics.co.uk/Technical%20Papers/hsluust1999.pdf

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