about self righting capacity

Discussion in 'Stability' started by Hunterr, Apr 10, 2016.

  1. Hunterr
    Joined: Jun 2015
    Posts: 29
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: Korea

    Hunterr Junior Member

    u can see the self-righting of boat below link.

    https://youtu.be/Y2i1fOJ-itw


    I want to know the how Rescue boat has self-springing moment.
    do u guyz know the structure under upper deck?

    fill with concrete or mercury near the Keel?

    and Is it possible to Outboard engine?
     
    Hunterr, Apr 10, 2016
    #1
  2. Mr Efficiency
    Joined: Oct 2010
    Posts: 10,386
    Likes: 1,049, Points: 113, Legacy Rep: 702
    Location: Australia

    Mr Efficiency Senior Member

    Less about concrete and more about the pyramidal "conning tower" I'd suggest.
     
    Mr Efficiency, Apr 11, 2016
    #2
  3. Jamie Kennedy
    Joined: Jun 2015
    Posts: 541
    Likes: 10, Points: 0, Legacy Rep: 117
    Location: Saint John New Brunswick

    Jamie Kennedy Senior Member

    Jamie Kennedy, Apr 11, 2016
    #3
  4. Hunterr
    Joined: Jun 2015
    Posts: 29
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: Korea

    Hunterr Junior Member

    Can you tell me easily? I cant understand
     
    Hunterr, Apr 12, 2016
    #4
  5. xichyu
    Joined: Apr 2016
    Posts: 99
    Likes: 0, Points: 6, Legacy Rep: 10
    Location: Dalian，Liaoning，China

    xichyu Junior Member

    xichyu, Apr 12, 2016
    #5
  6. TANSL
    Joined: Sep 2011
    Posts: 7,647
    Likes: 806, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    Any ship can sink.
     
    TANSL, Apr 12, 2016
    #6

  8. CDBarry
    Joined: Nov 2002
    Posts: 824
    Likes: 60, Points: 28, Legacy Rep: 354
    Location: Maryland

    CDBarry Senior Member

    Google "45 RB-M Self-Righting" for another test video.

    The Finnish commercial rules require any "patrol" or "rescue" boat to be self-righting.

    It is achieved with a carefully designed deck house and other topside features.

    Cohen and Ghosh did a SNAME paper in 1991 on the 47 MLB that discusses the process in detail.
     
    CDBarry, Apr 23, 2016
    #7
Loading...
Similar Threads
  1. James Wellington

    Self righting possible?

    James Wellington, Mar 31, 2022, in forum: Stability
    Replies:
    20
    Views:
    4,769
    jehardiman
    Apr 2, 2022
  2. Trixini

    Self-righting hard chined boat

    Trixini, Sep 1, 2016, in forum: Stability
    Replies:
    15
    Views:
    6,858
    Heimfried
    Sep 2, 2016
  3. Joakem

    ISAF OSR Cat_0 Self-righting sailboat?

    Joakem, Feb 11, 2016, in forum: Stability
    Replies:
    21
    Views:
    4,978
    Joakem
    Mar 22, 2016
  4. anson_07

    self-righting life rafts

    anson_07, Nov 9, 2014, in forum: Stability
    Replies:
    28
    Views:
    6,139
    jimburden
    Oct 12, 2015
  5. zurk

    Making this boat self righting.

    zurk, Apr 22, 2014, in forum: Stability
    Replies:
    77
    Views:
    23,382
    Boat Design Net Moderator
    Apr 25, 2014
  6. Alik

    Self-righting boats - statistics of capsize

    Alik, Dec 13, 2012, in forum: Stability
    Replies:
    7
    Views:
    3,813
    Alik
    Dec 13, 2012
  7. valvebounce

    self righting stability

    valvebounce, Jul 1, 2012, in forum: Stability
    Replies:
    23
    Views:
    5,437
    valvebounce
    Jul 8, 2012
  8. kvsgkvng

    Self-Righting Catamarans

    kvsgkvng, Mar 11, 2012, in forum: Stability
    Replies:
    31
    Views:
    21,277
    MyTorment
    Apr 14, 2012
  9. fatcat1111

    Data on time required to self-right

    fatcat1111, Jun 17, 2014, in forum: Stability
    Replies:
    7
    Views:
    2,622
    JosephT
    Jul 2, 2014
  10. ORPHEN

    Please HELP. Stability Criteria for an LCT/Self Propelled Barge

    ORPHEN, Oct 6, 2011, in forum: Stability
    Replies:
    6
    Views:
    4,574
    Vinassman
    Nov 23, 2011
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.