prop size?

Discussion in 'Inboards' started by jsh, Sep 30, 2008.

Page 3 of 3
  1. bit
    Joined: Feb 2008
    Posts: 46
    Likes: 1, Points: 8, Legacy Rep: 34
    Location: Trieste

    bit Student

    Thanks Rick
    Excuse if advantage of your patience.
    If you look at the attached file and give me some other advice ...
    Thank you
     

    Attached Files:

    bit, Jan 26, 2009
    #31

  3. Guest625101138

    Guest625101138 Previous Member

    You need to tell me what advice you want. If you want to check the data you could compare with Wageningen series data.

    The prop is very large and slow revving for the power. Also for a practical prop you would need much larger cord and heavier section at the hub. Efficiency is low for such a large diameter. It will have quite high EAR. Blade aspect is about 2. You could possibly reduce the EAR by operating at higher angle of attack and still have blades that can be made strong enough.

    The hub for a prop of this size will be much bigger than you have. At least 0.2m and maybe even 0.3m.

    Rick W
     
    Guest625101138, Jan 26, 2009
    #32
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