Z-bow

Discussion in 'Boat Design' started by DHMzip, Jul 21, 2010.

  1. DHMzip
    Joined: Jul 2010
    Posts: 27
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: USA/UK

    DHMzip Junior Member

    Hi,

    I was wondering if anybody know more information about z-bows
     
  2. jehardiman
    Joined: Aug 2004
    Posts: 2,970
    Likes: 488, Points: 83, Legacy Rep: 2040
    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    Just an old concept with a different shape and name. Go look at any old baidarka, ram bow or hurricane bulb bow. The idea is to get the bow pressure disturbance out ahead of the actual cutwater while reducing WP area forward but adding pitch damping. Only useful on certian hull shapes.

    Compare to an axe bow.
     
  3. waikikin
    Joined: Jan 2006
    Posts: 2,373
    Likes: 137, Points: 73, Legacy Rep: 871
    Location: Australia

    waikikin Senior Member

    Alloy Z Cat. 6.5 metre and enlarged version on 2.8 metre beam.

    All new 6.5 metre Alloy Z Cat. An extended waterline trailable power catamaran with real style. Beam 2.4 metres. Displacement about 1500kg deep.

    PDF: Aluminium Power Cat Series

    Boden boat plans have one designed by Troy Munnery

    Add to Shortlist

    $US 35.00

    $US 550.00
     
    Last edited: Jul 22, 2010
  4. DHMzip
    Joined: Jul 2010
    Posts: 27
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: USA/UK

    DHMzip Junior Member

    thanks for your replies.

    I am aware of the look and shape of the zbow. I know it is helpful for pitch damping especially for semi-planing hull forms.

    "The idea is to get the bow pressure disturbance out ahead of the actual cutwater while reducing WP area forward but adding pitch damping. Only useful on certian hull shapes."

    which hull types?
    how do you add reserve buoyancy by reducing WP area fwd?
    I thought the idea was to increase area fwd of the boat, therefore helping with the boats balance.

    how does this compare to an axe bow? is it the same principal with just the top part cut out as a "Z" shape?

    if there is a naval architect out there who could give me some sort of mathematical example it would help me solidify this it would be super.

    Thanks
     
  5. DHMzip
    Joined: Jul 2010
    Posts: 27
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: USA/UK

    DHMzip Junior Member

    Also how do z-bows compare to other cat hull bow shapes, such as wave piercing or standard or just super extended
     
  6. brian eiland
    Joined: Jun 2002
    Posts: 4,962
    Likes: 184, Points: 73, Legacy Rep: 1903
    Location: St Augustine Fl, Thailand

    brian eiland Senior Member

    Attached Files:


  7. Greg Buckley
    Joined: Apr 2018
    Posts: 1
    Likes: 0, Points: 1
    Location: Inverloch

    Greg Buckley New Member

    We have been building Z bow catamarans for ten years, ranging from 8.5m to 15m,. I'll attach some pics of rough water use. we have had them out in 4-5m seas and they handle beautifully.
     

    Attached Files:

Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.