Relationship between LCB LCF LCG against trim

Discussion in 'Stability' started by SHMD, Jul 13, 2023.

  1. SHMD
    Joined: Jul 2023
    Posts: 1
    Likes: 0, Points: 1
    Location: Hong Kong

    SHMD New Member

    Hello everyone. I learnt very basic knowledge about longitudinal stability and I have some doubts for this model. As you can see, I have my boat trimmed by stern for 4.4 cm. Below are my major doubts:

    1. Is LCF necessary to be in between LCB and LCG? Correct me if I am wrong, cuz '' LCF is the pivot point where the ship trim''.

    2. The ship is trimmed by stern, but why the LCB (2.631) is still slightly abaft than the LCG (2.636) ?
    [​IMG]
     

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  2. Ad Hoc
    Joined: Oct 2008
    Posts: 7,840
    Likes: 1,724, Points: 113, Legacy Rep: 2488
    Location: Japan

    Ad Hoc Naval Architect

    Hi SHMD, welcome to the forum.

    No..it can be anywhere..it depends upon the hull shape.

    The difference is less than 0.2%...so it most likely a rounding function in the software.
    Since the LCB and LCG must always be in line, otherwise it is no longer in equilibrium.
     
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