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  • de h4 4 blade prop

    anyone know what these letters stand for AMC 5275 D1 on this de h4 prop.
    Bob
    Attached Files

  • #2
    Welcome to the Forum Bob.

    This is the serial number given to the prop by Airco, the Aircraft Manufacturing Company. Geoffery de Havilland was the chief designer and designed the DH4 bomber. AMC made some props for its own aircraft but most were made under government contract, principally by Maple but also by others such as the Integral Propeller Co.

    With kind regards,

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

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    • #3
      Dh4

      thanks for the information.
      is there any of way of dating it,apart from the numbers and letters on the hub; it has G 299 N1 stamped on the blades.
      Bob
      Last edited by ybc; 07-19-2011, 03:38 PM.

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      • #4
        better pics dh4 prop

        better pics of dh4 prop. has been cut in half and put back together with newly made bracket to resemble engine mount.
        i am presuming its actually a ww1 prop.
        Bob
        Attached Files

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        • #5
          Bob,

          The G number is a batch number, here 299, and N1 indicates its the first in a batch of 100. It dates from late 1917.

          Your data decodes as;

          P3640 Pitch in mm
          D3048 Diameter in mm
          DRG 2442 The drawing number. It's an Air Board design and the full number would be written as AB2442
          RAF3A The engine, a type 3A of 200hp designed by the Royal Aircraft Factory
          DE H4 The aircraft type; the DH4 in modern notation. Designed by Geoffery de Havilland, the designer at the Aircraft Manufacturing Company, known as AIRCO

          With kind regards,

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

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          • #6
            dh4

            thanks alot for all the info.
            bob

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