Prop blade and pitch Q

Discussion in 'Propulsion' started by rowboat captain, Apr 2, 2008.

  1. rowboat captain

    rowboat captain Member

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    I have a 3 blade 40 pitch 1 1/2 inch prop on my DKM Bismarck. I am looking to get more speed. will a 4 blade 40 pitch work or go to a 25 pitch 3 or 4 blade prop?

    Thanks
     
    rowboat captain, Apr 2, 2008
    #1
  2. djranier

    djranier Well-Known Member

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    Change the pinion gear, if you run a 14 go to a 15, or 16. A 1 1/2 inch seem small for a Bismarck, I think most guys use a 1 3/4 or 2 inch prop.
     
    djranier, Apr 3, 2008
    #2
  3. Tugboat

    Tugboat Facilitator RCWC Staff Admiral (Supporter)

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    Yeah, with a 1.5 inch, your accel/decel will be t3h suxor. :)
     
    Tugboat, Apr 3, 2008
    #3
  4. rowboat captain

    rowboat captain Member

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    Sorry it is a 1 3/4 prop that I am using will try to change to a different pinion gear. I am runing a 14 tooth pinion right now.
     
    rowboat captain, Apr 3, 2008
    #4
  5. Powder Monkey

    Powder Monkey Active Member

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    [:0] did n't even think that far yet any one running a baltimore type class or close that is willing to share pinion size

    As Built 674 70 14000 17100
     
    Powder Monkey, Apr 4, 2008
    #5
  6. djranier

    djranier Well-Known Member

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    Going up 1 size in the pinion should increase your speed by around 1 1/2 seconds. Then you can add larger drag disks, which will have the side affect of improving your steering. [:D]
     
    djranier, Apr 4, 2008
    #6