Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: French Bureau of Longitude in 1885
    From: Antoine Couëtte
    Date: 2016 Sep 29, 11:45 -0700

    Hello Steve,

    Thanks for your reply.

    Honesty has me to rectify part of my earlier hasty statement and to say in writing that Taylor did study cylindrical flow, but the so-called "Taylor" vortices were first evidenced - although not studied in the same detail level - by Maurice Couëtte in what he calls the "troisième régime" , i.e. our modern "Chaotic" flow. In his own designed system, he evidenced the Laminar (premier régime) and Turbulent (second régime) flows - earlier well described by different renowned Authors, e.g. by Lord Reynolds for different liquids flowing in the same tubes, re: the Reynolds Numbers widely used to-day to characterise flows in aerodynamics for example - and Maurice Couëtte was one of the first ones if not the very first one to put one finger and to publish on the Chaotic Flow (troisième régime) which was then at the upper limit of his own designed sytem in terms of maximum attainable rotation speed. That was still enough to him to evidence the now  so-called famous "Taylors vortices" which the - again "Great"  -Taylor could study in much more detail given the much better equipement - including measuring equipment - he could have at hand as a result of dramatically improved technologies - to include electrical engines and much more - over the previous 30 years (1890-1920).

    But again ... and as if it had been decided in higher circles, my Great Grand Father's Family name "Couette" is sooner or later to be entirely deleted from all future English scientific literature, which has become and is more and more becoming - and by far - the prevailing one worldwide. Quid hoc ...

    Best Friendly Regards, and thanks again,

    Antoine M. Couëtte

    (2 slightly different and officially registered spellings for my Family name: Couette and Couëtte, and even a third one: Coüette, although the most ancient and [most] probably the only right one, but no longer in use for over one century)

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site