prop identification

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  • April 18, 2017 at 8:18 pm #6786
    joellerich
    Participant

      I have a variable pitch prop 8.25" dia The only id is M60 stamped on the hub. I think it might fit some 1950’s Champion.

      CAN ANY ONE ID THIS PROP, USED ON INFO, AND THE PITCH RANGE.

      THANKS

      JOHN OELLERICH

      April 18, 2017 at 11:02 pm #56332
      retiredoz
      Participant

        I can find an M60 listed for Muncie 9A,10A,11A etc. Book says three-blade alum 9X9, so that might not be the one…

        April 19, 2017 at 4:33 am #56349
        garry-in-michigan
        Participant

          Lifetime Member

          Variable pitched props have been around since 1898. Caille had them for many years. several companies produced various configurations in the early ’50s. One I recall had fixed blades and was sold with the idea that if you damaged a blade, you could replace it cheaper than buying a new propeller. Another was spring loaded so at an idle it had a lower pitch. This gave it a slower idle and faster acceleration. At faster speeds water pressure overcame the spring tension and increased the pitch for fast cruising. One was adjustable by loosening a set screw and turning an adjusting collar. The one was adjustable by remote control. . . 😀

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