Info on Sails and rigging

Discussion in 'Sailboats' started by Igor Tchouiko, Mar 30, 2019.

  1. Igor Tchouiko
    Joined: Nov 2017
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    Location: St. John's

    Igor Tchouiko New Member

    Hi everyone,

    I'm working on my Monte Carlo Simulation for the probability of being demasted.

    My professor recommended that I keep it super simple, saying that I should make the assumption that if the force experienced by the forestay is large enough to break it, then the mast will also fail.

    Following the force to the origin, the wind, we will assume that the force experienced by the sails is a function of wind speed, sail area, and heading. With the sail area being a function of wind speed and heading also. This way the force experienced by the forestay is the force experienced by the sails multiplied by some multiplier that takes into account the amount of sail area force that is actually transmitted to the forestay.

    I need some resources on rigging and sail physics. I cant google my way there for some reason. It would be wonderful to also find a resource that states many different types of sailboats and their dimensions. Say LOA, displacement, sail area, rigging type, things along these lines. Any and all info would be great.

    Thanks everyone!


    Please and thank you
     
    Last edited: Mar 30, 2019
  2. TANSL
    Joined: Sep 2011
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    Location: Spain

    TANSL Senior Member

    Attached Files:

    Dejay likes this.
  3. Igor Tchouiko
    Joined: Nov 2017
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    Location: St. John's

    Igor Tchouiko New Member

    Thanks TANSL, my project takes into account many different boats. It's for a general case to see if the mast will fail once a certain force is exerted on it. A Monte Carlo simulation will do thousands of random tests on the terameters I input into it and spit out the results, after a large enough sample I can get an idea of the probability of demasting.
     
  4. TANSL
    Joined: Sep 2011
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    Location: Spain

    TANSL Senior Member

    Well, if at some point you are lost, you think that the traditional method may be appropriate and you think I can help you, do not hesitate to ask for help.
    There is no factor, without more, that allows you to deduct the loads on the mast depending on the load on the fore stay.
    Good luck.
     
  5. Igor Tchouiko
    Joined: Nov 2017
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    Location: St. John's

    Igor Tchouiko New Member

    TANSL that link is great! It's everything I need to get this off the ground. Thanks so much

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

    brian eiland Senior Member

    TANSL, it appears as though you have been a member on this forum since 2011. Did you ever have occasion to add a posting to this discussion I started long ago?,...
    Sail Loading on the Rig, Rig Loading on the Vessel

    Your PDF attachment looks to be quite interesting.

    Regrettable my older mind is not cooperating with pursuing these discussions in depth any more
     

  7. TANSL
    Joined: Sep 2011
    Posts: 5,490
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    Location: Spain

    TANSL Senior Member

    I'm sorry to admit that I did not follow the thread you're talking about.
    What I describe in the .pdf file of post #2 is nothing more than the NBS procedure, with something added by me (it is not a "new procedure"). All this is put into practice in my software "MyR" that, if you want, you can use to study quickly different configurations of the rigging and establish comparisons. You can download it on this link : Dropbox - Naval Architecture Software - Simplify your life https://www.dropbox.com/sh/z3yu88u88t9rict/AADPVE8By6CVq7xy_gdowp8Aa?dl=0
    If you need help or any clarification, I will gladly assist you.
     
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