Rib Buoyancy According Iso 6185/3

Discussion in 'Boat Design' started by Greekfleet, Jan 17, 2008.

  1. Greekfleet
    Joined: May 2007
    Posts: 13
    Likes: 1, Points: 3, Legacy Rep: 12
    Location: ATHENS

    Greekfleet Junior Member

    hello designers and "wanbe" designers!
    I would like to ask a question in those who have used this standard.

    The "buoyancy of the rib" witch is involved in some basic equations according to the standard is (paragraph 3-3.4) :the inflated buoyancy and the permanent inherent buoyancy or at least two compartements of permanent sealed buoyancy ,fixed to the rigid hull, not exceeding 20% of the total buoyancy.

    can you please explain that to me.

    for example:
    if we say a=inflated volume
    b=the perm.inherent buoyancy or
    the perm.sealed buoyancy
    then a+b=T(total volume)
    but b<=0.2T
    so a+0.2T=T
    a=T*0.8
    T=a/0.8 which means the volume is 10/8 *a=1.25a

    Am i wright?

    thank you very much and sorry for stealing you time
     
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