Why are larger hulls heavier than smaller ones?

Discussion in 'Boat Design' started by ToMy, Oct 7, 2022.

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  1. ChrisVJ
    Joined: Nov 2021
    Posts: 26
    Likes: 2, Points: 3
    Location: Kelowna

    ChrisVJ Junior Member

    Hulls are designed so that contact is progressive and obviously most of the weight is supported by the wings at contact. The problem also happens when "Taxiing on the plane."
     
    ChrisVJ, Oct 18, 2022
    #16
  2. jehardiman
    Joined: Aug 2004
    Posts: 3,908
    Likes: 1,270, Points: 113, Legacy Rep: 2040
    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    <rolleyes> It has nothing to do with where the weight is supported or the area, it is all about the thrust/drag couple...

    Yes, ripples have less drag than DFC, but it is a turbulent vs laminar drag issue. Many of the early 20th century Gold Cup multi-step vessels were designed this way.
     
    jehardiman, Oct 18, 2022
    #17
    Will Gilmore likes this.

  4. ToMy
    Joined: Jun 2022
    Posts: 6
    Likes: 0, Points: 1
    Location: Finland

    ToMy Junior Member

    It has been a few months since the the last post, but I think I found an answer. (At least a partial one) This is from "Naval Architecture of Planing Hulls" by Lindsay Lord. Page 25
     

    Attached Files:

    ToMy, Feb 1, 2023
    #18
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