deck mounted booms

Discussion in 'Boat Design' started by samh, Nov 12, 2003.

  1. samh
    Joined: Aug 2003
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    Location: Philadelphia

    samh Junior Member

    [​IMG]

    I am wondering about the nature of existence.. no, thats not it.. oh yes, the combination of a deck mounted boom and one of these very tall cabin tops, as in the image of Everest Horizontal above.

    The great volume of the cabin top would be a benefit in a roll over, and on a much smaller boat (mini?) perhaps would even provide the much sought after and somewhat overrated standing head room. Deck mounting the boom takes the load off of the mast and standing rigging.

    What is the trade off? The angle of the boom to the mast (forgive me, I can't seem to tell my leech from my luff) seems a bit extreme, something like 90 degrees on a standard rig to what, 35 degrees here? The sail cut would have to be for lack of better understanding, non-standard, so that the boom could tack across the high cabin.

    Why not?

    S
     
  2. SailDesign
    Joined: Jan 2003
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    Location: Jamestown, RI, USA

    SailDesign Old Phart! Stay upwind..

    Sam,
    Everest Horizontal has a "slightly" higher house than most in her class, but the angle of boom to mast is still only in the 75-80 degree region (viewed straight sideways). There are numerous advantages, such as not being so likely to dip your boom in the water with the fixed vang set (experience speaks...) while still enjoying the "same" sail area you might have with a conventional set-up. With the gooseneck set aft of the mast, the sail automatically becomes more full as you let it out. Being a loose-footed sail, there is also MUCH more room for any green water to slide out of the foot and overboard than on a conventional main with a large shelf. That last one is handy in the Southern Ocean, so I'm told ;-)

    Steve
     
  3. samh
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    samh Junior Member

    What keeps the boom from dragging on the top of the house when the main is reefed?
     
  4. SailDesign
    Joined: Jan 2003
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    SailDesign Old Phart! Stay upwind..

    Quote:
    "What keeps the boom from dragging on the top of the house when the main is reefed?"

    A proper reef... ;-P
     

  5. BVI Jon
    Joined: Sep 2003
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    BVI Jon Junior Member

    The boom was not raised to make room for the house, the house is there because there is room for it.

    Well said Steve.

    Jon.
     
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