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    Re: Dennert & Pape MHR-1 HR-2 Cylindrical Slide Line Ruler
    From: Wolfgang K�berer
    Date: 2007 Jul 26, 21:32 +0200

    Dear Max,
    these articles contain the information you need about Bygrave slide rules:
    Kolbe, Geoffrey,
    Bygrave Slide Rule Revisited.
    in: Navigator's Newsletter, No. 93 (Fall 2006), 10 - 13.
    Luykx, John M.
    The Bygrave Position Slide Rule.
    in: Navigator's Newsletter, No. 30 (Fall 1990), 9 - 10.
    Barnes, Colin
    Henry Hughes & Son Limited and the Bygrave Slide Rule.
    in: Slide Rule GAZETTE, Inaugural Issue, (Autumn 2000), 7 - 11.
    The information about the MHR1 and MHR2 is in German:
    Komorowski, Uli
    Der Besteckh�henrechenschieber.
    in: Piekfall, Nr. 84 (2004), 23 - 30.
    Pohlmann, Henning
    Die Navigationsrechenschieber MHR1 und MHR2 f�r die Kriegsmarine.
    in: K�hn, Klaus und Karl Kleine (Hrsg.), Dennert & Pape ARISTO 1872-1978 :
    Rechenschieber und mathematisch-geod�tische Instrumente, M�nchen 2004, 264 -
    The ARG1 is an instrument to solve the navigational triangle by means of a
    It is described in the following article
    Charlwood, David,
    On the Astronomisches Rechengerat ARG1.
    in: Navigator's Newsletter, No. 76 (Summer 2002), 10 - 19.
    There is an ARG1 in the National Maritime Museum Greenwich (in storage);
    another one is Royal Navy Submarine Collections (Shelf No. Q35/27/84).
    The successor of the ARG1, the ARG3, was still in production in the GDR
    after WWII and in use by the East German Merchant Marine: The 1969 edition
    (reprinted in 1979) of the manual of astronomical navigation by Steinfatt
    and Uhlig contains a chapter on evaluation of star sights by means of the
    In April 2006 an ARG3 was sold on ebay for just over 100 EURO; I doubt that one
    could pick up another one so cheap again.
    Best regards
    Wolfgang K�berer
    -----Urspr�ngliche Nachricht-----
    Von: NavList@fer3.com [mailto:NavList@fer3.com]Im
    Auftrag von MaxU88
    Gesendet: Mittwoch, 25. Juli 2007 20:58
    An: NavList
    Betreff: [NavList 3030] Dennert & Pape MHR-1 HR-2 Cylindrical Slide Line
    Hi All
    I'm new to this group,so I thought that I would start with a bit on an
    My name's Max and I am a collector of memorabilia from the German
    Kriegsmarine of WW2.  My collection can be viewed here at my site:
    I have decided to join this group, as being a collector of Naval items
    I have a keen interest in Navigational Instruments.
    Whilst doing a Google search for some items that I have in my
    collection (and items that I am looking for), I came across an
    archived message regarding a couple of instruments that I have.
    The Instruments in question are the Dennert & Pape (gwr) HR-2 and
    MHR-1.  I have neen trying to gather information on these Navi
    Insruments to help understand them a little better.  I know of a few
    in Museums around the Globe and a couple in private collections.  I
    would like to share mine with members of this Group, as these are
    seldom seen anywhere.
    If you click on this link (or copy and paste), I have posted a few
    stills for all to see:
    You will also be able to see the rarely seen Bygrave AML Position Line
    Ruler, that the MHR-1 (and the HR-1 Luftwaffe equivalent) was based
    The only other Navigational Instrument that keeps eluding me is the
    Carl Zeiss Jena (blc) ARG-1 (Astronomisches Rechenger�t 1).  This was
    a Luftwaffe intrument, but the Kriegsmarine ordered a small number to
    carry out trials on U-boats.  These proved so successful, they were
    adopted by the U-boat Arm.  The only difference between the Luftwaffe
    and Kriegsmarine instrument, is the letter 'M' on the top of the
    casing.  Everything else (including the FL~~~~ Luftwaffe code)
    remained the same.
    If anyone knows of one.....
    All the very best and thank you for taking tme to read my post.
    To post to this group, send email to NavList@fer3.com
    To unsubscribe, send email to NavList-unsubscribe@fer3.com

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