QUESTION ABOUT 'PRINCIPLES OF YACHT DESIGN' by L. LARSSON

Discussion in 'Stability' started by EAP, Mar 31, 2007.

  1. EAP
    Joined: Aug 2006
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    EAP Junior Member

    Rig Construction Calculations, Page 181-182. There Is A Formula For Finding The Righting Moment. I Gather The 'dimensioning' Rm Ratio Simply Magnifies The Rm30 A Bit, Along With The Added Crew Rm. My Question Is: Where Does Larrson Come Up With The Added Crew Rm Formula??
    Any Input Would Be Greatly Appreciated
    Earl P
     
  2. Alik
    Joined: Jul 2003
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    Alik Senior Member

    Are You using first edition of Larsson?
    If so, as I remember, the formula for righting moment is on page just before 'Rig Construction' section.
     
  3. terhohalme
    Joined: Jun 2003
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    terhohalme BEng Boat Technology

    It is from Nordic Boat Standard 1990 as the whole calulation method.
     

  4. Guillermo
    Joined: Mar 2005
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    Guillermo Ingeniero Naval

    Yeap. In the second edition (2000), Rig Construction begins at page 205. There is clearly stated the Nordic Boat Standard is used, instead of ABS or Lloyd's Register, as the NBS "is one of the few yacht scantling standards taht takes the rig into consideration" (sic.)

    Cheers.
     
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