Understanding "TRIM" in Freeship hydrostatics?

Discussion in 'Software' started by MCDenny, Jun 15, 2011.

  1. MCDenny
    Joined: Jul 2009
    Posts: 53
    Likes: 2, Points: 0, Legacy Rep: 54
    Location: SE Michigan USA

    MCDenny Junior Member

    I've got a 22' power boat design that requires a trim value of -.100 feet (1.2") to move the LCB aft about 5" to match the LCG.

    My question is this: How do I locate the new waterline in the profile view?

    Thanks.
     
  2. Olav
    Joined: Dec 2003
    Posts: 296
    Likes: 30, Points: 38, Legacy Rep: 460
    Location: Filia pulchra Lubecæ

    Olav arch. nav.

    Just rotate the hull around the y-axis ("Transform" -> "Rotate"). You need to calculate the rotation angle to match the desired trim of -1.2" first or do it the trial-and-error way.

    Most likely you have to adjust the draught also to maintain your design displacement.
     
  3. MCDenny
    Joined: Jul 2009
    Posts: 53
    Likes: 2, Points: 0, Legacy Rep: 54
    Location: SE Michigan USA

    MCDenny Junior Member

    Thanks, Olav. That was easy.
     
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