General sportfish hull-tunnel design questions

Discussion in 'Boat Design' started by buckshot, Jun 16, 2024.

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  1. baeckmo
    Joined: Jun 2009
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    Location: Sweden

    baeckmo Hydrodynamics

    If there's just one thing you should do, it is blocking off part of the top exit of the tunnels with a crescent shaped segment. Transverse width about 300 mm, height on top ~40 > 50 mm, reducing to 10 each end, and 50 mm long, outer shape to follow the tunnel roof, edges sharp. That will take care of the main ventilation path.
     
    baeckmo, Jun 20, 2024
    #16
  2. Fiberglass 1 Inc
    Joined: Jun 2024
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    Location: Palm Beach Gardens FL

    Fiberglass 1 Inc Junior Member

    I apologize for possibly being misleading. After looking at another 41 and several other tunnel boats, 4 inch clearance is not unusual.
     
    Fiberglass 1 Inc, Jun 26, 2024
    #17

  4. Fiberglass 1 Inc
    Joined: Jun 2024
    Posts: 5
    Likes: 0, Points: 1
    Location: Palm Beach Gardens FL

    Fiberglass 1 Inc Junior Member

    Addendum - I was consulting on a Luhrs 41 a couple days ago and noticed it had the tunnel extensions and also had a prop tip to tunnel clearance of about 1.5 inches. This could be because it had more horsepower and therefore larger diameter wheels.
     
    Fiberglass 1 Inc, Jul 5, 2024
    #18
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