Stability

Discuss stability issues and calculations, power and sail.

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  1. Guillermo

    Seaworthiness

    Guillermo, Nov 26, 2006 ... 75 76 77
    Replies:
    1,140
    Views:
    400,319
    Guillermo
    Jun 7, 2011
  2. Crag Cay

    Bourbon Dolphin capsizes

    Crag Cay, Apr 12, 2007 ... 43 44 45
    Replies:
    670
    Views:
    210,968
    dougfrolich
    Oct 1, 2009
  3. junk2lee
    Locked

    Swain BS_36 Stability curve

    junk2lee, Mar 9, 2011 ... 32 33 34
    Replies:
    497
    Views:
    111,394
    Boat Design Net Moderator
    May 29, 2011
  4. smartbight
    Locked

    Costa Concordia, 80 deg list, really scary !!

    smartbight, Jan 15, 2012 ... 31 32 33
    Replies:
    484
    Views:
    136,613
    Boat Design Net Moderator
    Sep 23, 2013
  5. Guillermo

    Sailing boats' Stability, STIX and Old Ratios

    Guillermo, Sep 3, 2006 ... 25 26 27
    Replies:
    393
    Views:
    352,531
    hoytedow
    Feb 14, 2021
  6. Sachi

    Boat Capsize Evidence

    Sachi, Oct 10, 2009 ... 13 14 15
    Replies:
    222
    Views:
    38,776
    Tad
    Dec 20, 2010
  7. Squidly-Diddly

    South Korean ferry MV Sewol flips, 1/2 sunk in shallows, people trapped.....

    Squidly-Diddly, Apr 17, 2014 ... 11 12 13
    Replies:
    193
    Views:
    61,064
    jehardiman
    Apr 18, 2019
  8. Antonio Alcalá

    The roll acceleration: What´s the best for crossing oceans?

    Antonio Alcalá, Dec 18, 2007 ... 8 9 10
    Replies:
    146
    Views:
    235,914
    dougfrolich
    Feb 25, 2013
  9. DogCavalry

    Barge to carry a single pick-up truck

    DogCavalry, Sep 9, 2023 ... 8 9 10
    Replies:
    140
    Views:
    21,200
    DogCavalry
    May 16, 2025
  10. Antonio Alcalá

    Let´s be practical. Are we in the right way?

    Antonio Alcalá, Nov 6, 2007 ... 7 8 9
    Replies:
    128
    Views:
    42,282
    Guillermo
    Jan 30, 2008
  11. peter radclyffe

    cheeky rafiki

    peter radclyffe, May 21, 2014 ... 5 6 7
    Replies:
    104
    Views:
    36,743
    HydroNick
    Jul 15, 2017
  12. michael pierzga

    Yacht Yogi sinks

    michael pierzga, Feb 17, 2012 ... 5 6 7
    Replies:
    101
    Views:
    46,012
    trafalgar
    Feb 26, 2013
  13. griff10

    stability with speed

    griff10, Aug 30, 2009 ... 5 6 7
    Replies:
    101
    Views:
    22,495
    nyalex
    Jan 5, 2010
  14. millionswords

    Small Kayak - Under 13 feet - Stability?

    millionswords, Dec 16, 2008 ... 5 6 7
    Replies:
    98
    Views:
    51,995
    millionswords
    Mar 13, 2009
  15. Nickname123

    How to decrease the inclining oscillation and increase the stability on the boat

    Nickname123, May 30, 2017 ... 5 6 7
    Replies:
    97
    Views:
    17,057
    JSL
    Sep 20, 2017
  16. Toot

    Water Ballast for small boats

    Toot, Sep 24, 2006 ... 5 6 7
    Replies:
    94
    Views:
    51,925
    doug kay
    Nov 8, 2007
  17. Mr Efficiency

    This comes at a hefty price, but seems impressive.....

    Mr Efficiency, Sep 11, 2020 ... 5 6 7
    Replies:
    92
    Views:
    14,257
    Kim Klaka
    Oct 17, 2020
  18. zurk
    Locked

    Making this boat self righting.

    zurk, Apr 22, 2014 ... 4 5 6
    Replies:
    77
    Views:
    25,539
    Boat Design Net Moderator
    Apr 25, 2014
  19. Captain Sunset

    too much weight for my solar powered pontoon styled boat

    Captain Sunset, Mar 5, 2019 ... 4 5 6
    Replies:
    76
    Views:
    12,112
    TANSL
    Mar 20, 2019
  20. DCockey

    Gerr's Roll Period Recommendation

    DCockey, Jun 20, 2011 ... 4 5 6
    Replies:
    75
    Views:
    28,548
    TeddyDiver
    Jun 29, 2011
  21. evantica

    Easyway out

    evantica, Feb 17, 2010 ... 4 5 6
    Replies:
    75
    Views:
    12,420
    Perm Stress
    Mar 12, 2010
  22. Guillermo

    Fishing Vesels stability

    Guillermo, Mar 8, 2008 ... 3 4 5
    Replies:
    71
    Views:
    22,386
    Guillermo
    Jul 23, 2011
  23. dougfrolich

    New requierments for boats over 20ft.

    dougfrolich, Jul 16, 2012 ... 3 4 5
    Replies:
    69
    Views:
    14,771
    Stephen Ditmore
    Sep 17, 2012
  24. CatBuilder

    Stability of Strange Canadian Boat (pictures inside)

    CatBuilder, Sep 11, 2010 ... 3 4 5
    Replies:
    66
    Views:
    34,687
    Tad
    Mar 26, 2012
  25. crasch

    Ramform vs SWATH for seakeeping?

    crasch, Jun 8, 2017 ... 3 4 5
    Replies:
    65
    Views:
    12,988
    phrogjlf@yahoo
    Sep 14, 2017
  26. cthippo

    Primary stability considerations in kayaks

    cthippo, Feb 28, 2012 ... 3 4 5
    Replies:
    65
    Views:
    19,045
    cthippo
    Feb 5, 2017
  27. diegoperrera

    Static stability(Academic problem)

    diegoperrera, Oct 1, 2014 ... 3 4 5
    Replies:
    64
    Views:
    10,427
    sharpii2
    Oct 9, 2014
  28. jfrech

    Stability Issues on my TUG - pls help!

    jfrech, Apr 3, 2014 ... 3 4 5
    Replies:
    64
    Views:
    14,652
    Yobarnacle
    May 6, 2014
  29. Farlander

    Mast builder and I had it out!

    Farlander, Mar 24, 2021 ... 3 4 5
    Replies:
    63
    Views:
    10,827
    fallguy
    Mar 29, 2021
  30. LeoKa

    Rolly custom steel motorboat

    LeoKa, Sep 2, 2024 ... 3 4 5
    Replies:
    62
    Views:
    5,169
    LeoKa
    Jun 30, 2025 at 9:24 PM
  31. waterbear

    Stability/Seakeeping of Deep V catamarans

    waterbear, May 3, 2019 ... 3 4 5
    Replies:
    60
    Views:
    11,555
    waterbear
    May 14, 2019
  32. Stephen Ditmore

    Open 60 & 50 (IOMCA) rule should be changed

    Stephen Ditmore, Dec 25, 2006 ... 2 3 4
    Replies:
    58
    Views:
    17,034
    lazeyjack
    May 9, 2007
  33. Mik the stick

    Grimalkin IS a good design

    Mik the stick, Sep 9, 2014 ... 2 3 4
    Replies:
    57
    Views:
    18,498
    Zedwardson
    Jan 23, 2015
  34. Sywofp

    Advice - can this houseboat be made to sit level with extra buoyancy?

    Sywofp, Apr 23, 2018 ... 2 3 4
    Replies:
    56
    Views:
    12,864
    fallguy
    Sep 13, 2018
  35. xichyu

    The stability of damaged ship

    xichyu, Apr 12, 2016 ... 2 3 4
    Replies:
    55
    Views:
    12,711
    Rabah
    Apr 19, 2016
  36. helen07

    Designing a new type of fishing boat .

    helen07, Oct 28, 2009 ... 2 3 4
    Replies:
    54
    Views:
    10,857
    waldoswhere
    Nov 11, 2009
  37. mike w. schultz

    USCG Stability Test for Power Trimaran

    mike w. schultz, Feb 10, 2020 ... 2 3 4
    Replies:
    52
    Views:
    15,403
    zstine
    Jan 31, 2021
  38. manon

    how to calculate stability of semi-submersible vessel?

    manon, May 30, 2009 ... 2 3 4
    Replies:
    52
    Views:
    23,398
    sirhamid
    Jul 8, 2009
  39. sudhir0201

    need help in Damage and Probailistic stability

    sudhir0201, Aug 22, 2010 ... 2 3 4
    Replies:
    50
    Views:
    15,817
    Dr34m3r
    Feb 4, 2015
  40. ali3

    Smallest boat to sail ocean safely?

    ali3, Aug 15, 2011 ... 2 3 4
    Replies:
    50
    Views:
    183,685
    GTO
    Sep 4, 2011
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