Explain Sailboat Specifications

Discussion in 'Sailboats' started by bfhaynes, Jul 3, 2006.

  1. bfhaynes
    Joined: Jul 2006
    Posts: 2
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Cedar Rapids, IA

    bfhaynes New Member

    I wanted an explanation of Sailboat specifications. I understand LOD, LWL, and headroom etc... I would like an explanation of Beam. How is the Beam measurment defined.
     
  2. Eric Sponberg
    Joined: Dec 2001
    Posts: 2,010
    Likes: 215, Points: 73, Legacy Rep: 2917
    Location: On board Corroboree

    Eric Sponberg Senior Member

    Beam is the maximum breadth (width) of a boat.

    Eric
     
    1 person likes this.
  3. Cliff Pope
    Joined: Nov 2005
    Posts: 21
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: UK

    Cliff Pope Junior Member

    Well, theoretically you could have significant variations between beam on waterline, beam on deck, and beam between rubbing strakes.
     
  4. RHough
    Joined: Nov 2005
    Posts: 1,792
    Likes: 61, Points: 0, Legacy Rep: 793
    Location: BC Summers / Nayarit Winters

    RHough Retro Dude

    Beam is generic, like length.

    If you want specifics you modify beam or length with words like waterline (waterline beam, waterline length).

    Is there a real question here?

    Common usage is maximum width of the hull. (not including fenders, rubrails etc.)
     

  5. tspeer
    Joined: Feb 2002
    Posts: 2,319
    Likes: 294, Points: 83, Legacy Rep: 1673
    Location: Port Gamble, Washington, USA

    tspeer Senior Member

    ITTC symbols

    sailboat dimensions and design ratios

    [​IMG]
    LOA = Length Overall - overall tip-to-tip length of the boat
    LWL = Length Waterline - length of waterline of the boat
    DWL = Design Waterline -theoretical waterline length of boat as opposed to LWL, which is actual waterline length
    BMX = Beam Maximum - width of the boat at the widest point
    BWL = Beam Waterline - widest beam of boat at the waterline
    I = Height of the foretriangle measured from the top of the highest sheave to the sheerline
    I2 = Height of staysail halyard above deck
    J = Base of the foretriangle measured from the front of the mast to the intersection of the forestay and deck
    J2 = Base of staysail triangle
    P = Luff length of the mainsail
    E = Foot length of the mainsail
    LP = Shortest distance from headstay to the clew of the jib
    (from Harken site)
     
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.