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Thread: helip on 19 in mini hydro

  1. #1
    Join Date
    Oct 2019
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    bc
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    47

    Default helip on 19 in mini hydro

    i found a set of drawings on a site i have since lost. this is a kneeler style 3 point boat and i have a ose mini outboard question is proper depth to mount motor. the other thing is with battery and speed esc placed fully forward i will need about 8oz balast in the nose to balance on rear of sponsons.where would be the correct cog on this type boat. tks AL

  2. #2
    Join Date
    Feb 2008
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    GB
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    I don't know that specific boat, but the bottom of the strut level with the bottom of the sponsons, and CoG 10-15% of the afterplane behind the sponsons wouldn't be a bad place to start.
    Paul Upton-Taylor, Greased Weasel Racing.

  3. #3
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    Oct 2019
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    bc
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    Quote Originally Posted by NativePaul View Post
    I don't know that specific boat, but the bottom of the strut level with the bottom of the sponsons, and CoG 10-15% of the afterplane behind the sponsons wouldn't be a bad place to start.
    thanks for the help but bieng new to this not sure what afterplane behind the sponsons means.tks al

  4. #4
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    The afterplane is the area between the plaining surfaces, so the distance from the back of your sponsons to the prop, you typically want the CoG at 10-15% of that distance as measured from the back of the sponsons.
    Untitled.jpg
    Paul Upton-Taylor, Greased Weasel Racing.

  5. #5
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    Oct 2019
    Location
    bc
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    Default

    thank you very much for your drawing and info. this should certainly help with my balance .tks AL

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