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  1. #1
    PeterF's Avatar
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    New Graupner 3 blade props

    Graupner have got some new 3 blade props that I have only recently found. See

    Graupner props

    with some handy sizes such as 16" x 10" (40cm x 25cm), 16" x 12" (40cm x 30cm) and 18" x 12" (45cm x 30cm).

    They also have some even larger carbon props at higher prices.

    I was wondering if anybody has tried any of these as they would seem to be ideal for the SP range of engines, or if RCV would test them to check rpm ranges etc as it would be good if the range of recommended props could be increased. APC seem to be reducing the range of their mutli bladed props at the moment.

  2. #2

    Join Date
    May 2003
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    RE: New Graupner 3 blade props

    I am running one of the 18 X 12 3 blades on my RCV 120. It is on a Hanger 9 Corsair. I have not put a tach on it, but it seems to fly just as fast or faster that the APC 15.5 X 12 4 blade that I was running. Engine seams very happy and runs cool. I am using Cool Power 15% MV fuel. The change to this fuel from Omega fuel, is the one thing that has made more differrence than anything else I have done to this engine. It turns much more freely and runs cooler. We put a temp gauge on the engine last week after I landed it and the highest reading that we could get from anywhere on the engine was 210 degrees.









  3. #3
    mike early's Avatar
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    RE: New Graupner 3 blade props

    where can these be had in the USA?
    Saito Club Member #578
    P-40 Brotherhood #62

  4. #4

    Join Date
    May 2003
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    RE: New Graupner 3 blade props

    My prop was ordered from Hobby Lobby.

    http://www.hobby-lobby.com/g-sonic_3...18516_prd1.htm

    I removed the printing from the prop, put yellow tips and fake Hamilton Standard stickers on it. It sure looks good on a low pass.

  5. #5

    Join Date
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    RE: New Graupner 3 blade props

    Wow, thats a LOT of engine for a Hangar 9, it should scream through the air!


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