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    Re: Manufacture new Bygraves?
    From: Frank Reed
    Date: 2009 Jul 3, 16:49 -0700

    Waaay back on May 23, when I suggested the possibility of manufacturing new Bygrave rules, I wrote:
    "Even just in the cel nav enthusiast market, I bet you could sell a thousand 
    of them [newly manufactured Bygrave rules] if the price was right (under 
    I didn't get around to mentioning back then that there is a larger market than 
    just celestial navigation enthusiasts. There seems to be a fairly large 
    market for slide rules and other manual computing devices in a broader 
    community of "engineering arts" enthusiasts and also fans of aviation 
    I respect very greatly Ken Gebhart's understanding of the marketplace and Gary 
    has said that Ken didn't think this was a commercially viable project. But if 
    one or several people were interested in getting the project to the prototype 
    phase, then it may be possible to find a manufacturer willing to do a small 
    run (a few hundred?) in some part of the world where manufacturing can still 
    be done cheaply (I'm thinking of Vietnam, but there are plenty of 
    possibilities). And once you've got product in hand, it's just a matter of 
    advertising and publicity.
    PS: Apologies if this has already been mentioned (I haven't read all of the 
    posts in the threads on this topic), regarding Aquino and Bygrave:
    "A regua cylindrica de Bygrave e as minhas Altitude and Azimuth Tables: com 
    uma exposi??o succinta da Nova Navega??o Altazimuthal e Isoazimuthal pelas 
    formulas e tabuas em tan +/- sec" 
    F. R. de Aquino, Imprensa Naval (Brazil), 1935 
    An approximate translation of the title: "The Bygrave cylindrical slide rule 
    and my altitude and azimuth tables: with a succinct explanation of 
    alt-azimuth and iso-azimuth new navigation by formulas and tables in 
    I haven't read it; just passing it along.
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