Main-less rig

Discussion in 'Multihulls' started by Spiv, Feb 10, 2008.

  1. brian eiland
    Joined: Jun 2002
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    Location: St Augustine Fl, Thailand

    brian eiland Senior Member

    Here is that list of postings on that subject thread that I found most interesting to review,...in anticipation of providing a new A-frame style rig alternative on a new 'picnic/weekender' catamaran design I am contemplating.
    ...word document
     

    Attached Files:

  2. brian eiland
    Joined: Jun 2002
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    Location: St Augustine Fl, Thailand

    brian eiland Senior Member

    By now many of you readers are aware of my affinity for the mast aft or aft mast sailing rig concept. For the most part I am content with this being a singular mast column, stepped a little further aft on the vessel, and canted forward approx 10 degrees.

    However, I’ve had more than a few people interested in alternative rigs ask about my rig and bi-podded rigs in the same questioning. Now, I was always enamored with bi-pod mast rig aboard Olaf Harken’s ‘Procyon’ vessel.

    So here I present some variations of the mast-aft rig configured with a wishbone/bipod mast column. There is a wide based version, and a narrow based one. And with each of these there are two different spreader arrangements that affect the very important cap shroud angle. Modern mast and rigging materials could very well make these unusual rigs a viable entity
     

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  3. Spiv
    Joined: Jun 2007
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    Location: The Big Wide Blue Brother

    Spiv Ancient Mariner

    Brian,
    I will go for the wider rig, but stepped against the saloon sides, in that way support could be created on a bulkhead, all the way to the bilge if necessary.

    If we use lower shrouds, we have to make sure they do not interfere with the mizzen (?? is this the name of the sail we want to use??).
    I think that the backstays should be attached to the transoms, to get better angle.

    What do you think of this drawing?

    I see Matthews has brought devastation to your coast, I hope you have not suffered damages.
     
  4. brian eiland
    Joined: Jun 2002
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    Location: St Augustine Fl, Thailand

    brian eiland Senior Member

    I'm going to have to give the whole idea some new thoughts.

    And you are correct I was right here in St Augustine for that hurricane. Fortunately I did not suffer to much damage to my homestead as I was a few miles inland. But others around me did, and I've been helping them clean up the last few days. Falling limbs got a few roofs, and we've had to put tarps over them temporarily. I lost power for about 16 hours, but many are still without for several days now.

    The ocean side residences took quite a beating from the sizable storm surge.
     
  5. brian eiland
    Joined: Jun 2002
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    Location: St Augustine Fl, Thailand

    brian eiland Senior Member

    Is a furling main safe when singlehanding?

    I found this to be an interesting and informative posting,...

    http://www.cruisersforum.com/forums/f122/is-a-furling-main-safe-when-singlehanding-175698-18.html#post2352480



    Great thread with lots of differing opinions and personal views. Some more strident than others but nevertheless interesting. Some of the opinions seem to be based on theory and not real world experience but are mostly worthwhile reading and considering for their diversity of views.

    I realise that this thread has probably run to its logical conclusion but I thought it would be valuable to at least make the following information easily available to all who may venture this way in the future seeking information on furling main sails.

    I attach a link to the ongoing SSCA Equipment Survey dealing with main sail furling / reefing and the overall analysis HERE.


    I attach a link from that same survey of all the opinions expressed by owners who actually sail with the type of equipment that they are commenting on HERE .
    It is quite a long read but very interesting and revealing and it is very germane to the extensive discussions that have been going on within this thread.

    The one take away message for me is that there are failures in all systems from the simple to the more complex. All systems work flawlessly for some sailors yet other sailors have monumental problems with these same choices of equipment.
    Probably the major difference here is that the operators of the various types of systems are the one thing where it is impossible to compare like for like.
    No one system is right for every sailor with their own particular situation given the the inherent differences in the individual and indeed where they sail and in what they sail.

    And for an interesting comparison I add the link for the analysis of those sailors who sail without an in mast or in boom furling system HERE .


    When one compares the Breakdowns/Unit and Breakdowns/Year data for both the in mast units and those with battens/sliders it shows that there is a slight difference but overall the reliability is within what most (but not all) sailors would be prepared to accept for the perceived advantages that each system provides. (Please do not turn this into a mathematical argument about percentage increases or decreases).

    What is obvious and revealing is that generally whichever system you choose they are mostly realiable and that is good news for all of us.

    We are lucky to have so many choices to suit our own personal situations and budgets.

    Now let's get that mainsail furled away neatly. ;)
    AussieWayne

    Thank you to the SSCA for compiling all this information and much more.
    There is lots of useful information on equipment and systems of all types
    HERE .
     

  6. brian eiland
    Joined: Jun 2002
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    Location: St Augustine Fl, Thailand

    brian eiland Senior Member

    Wishbone Boom

    I've recently run across a few of your postings, ....and I'm going to look for more. I found your use of a wishbone boom very interesting. I've sought to utilize one on the mizzen sail of my aftmast rig.

    http://www.boatdesign.net/forums/multihulls/open-bridgedeck-catamaran-design-53066-2.html#post734669



    http://www.boatdesign.net/forums/multihulls/open-bridgedeck-catamaran-design-53066-2.html#post734731


    Brian Eiland
     
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