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how do we ID our family prop

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  • how do we ID our family prop

    Propeller & Markings

    Blade Dia 2438 mm
    Hub thickness 149 mm
    Hub Dia 209 mm
    Hub bore 79 mm
    Bolts 8 * 12mm
    Bolt circle 170 mm
    Wood Mahogany
    Rotation from front of plane is anticlockwise

    Markings (some very hard to read)

    AB7873 R
    D2 P1710
    VIPER ENG

    N W Divers

    G711 N70
    10380


    We have 4 squares with a arrow head above them.
    At the tip of the arrow head is the letter A
    At the base of the arrow 488
    One square has in it AID & 7T3
    One square has in it A D & 7T3
    One square has in it D & 5
    The last one is blank

  • #2
    Welcome to the forum gww!

    Your data translates as follows
    AB7873 This is likely to be AB7673 which is the Air Board drawing number for the SE5A aircraft
    D2 D2414 diameter 2414mm
    P1710 Pitch 1710mm
    VIPER ENG Wolseley Viper, (licence-built French Hispano-Suiza engine of 200hp made by Wolseley)
    N W Divers Probably the maker but likely to have been mis-read. Could we have a close up photograph please?

    G711 N70 Number 70 (out of 100) in Batch number 711, dates from early 1918
    10380 Serial number of the propeller

    At the tip of the arrow head is the letter A Indicates an Air Board propeller
    At the base of the arrow 488 I don't know
    One square has in it AID & 7T3 These are air worthiness stamps of the Aeronautical Inspection department; usually there are four, each added at a different stage of manufacture
    One square has in it A D & 7T3 AID 7T3
    One square has in it D & 5 AID ?5? We need a close up photo please

    With kind regards,

    Bob
    Bob Gardner
    Author; WW1 British Propellers, WWI German Propellers
    http://www.aeroclocks.com

    Comment


    • #3
      Hi thank you for that information.
      My Grand father was in the RFC #74 squadron in France 1918-19.

      The photos some didn't show all the markings as some are faint. We read what we could with a light & magnifine glass.
      The NW Divers is in 4 places on the front of the hub.
      Attached Files

      Comment


      • #4
        Thank you for your excellent photographs.

        I suspect that all four AID stamps are from the same inspector, 7T3.

        The name NW Divers is very probably the name of the craftsman who made the prop. It was the custom in the late nineteenth and early twentieth century in some firms, such as cabinet makers and car makers for the man who made the item to stamp his name on it. (By 1918 most car makers, cabinet makers, interior decorators and other wood workers had been conscripted to make aircraft propellers). Darracq, for example, stamped each prop in this way and I have recorded seven different names on Darracq made props.

        With kind regards,

        Bob
        Bob Gardner
        Author; WW1 British Propellers, WWI German Propellers
        http://www.aeroclocks.com

        Comment

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