Multihulls

Discuss multi-hull sailboat design, production and custom sailing catamarans and trimarans.

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  1. surf boat man

    Australian surf boat conversion

    surf boat man, Sep 24, 2008 ... 2 3
    Replies:
    37
    Views:
    20,960
    Tiddles
    Jan 3, 2019
  2. TicTac

    Hobie Trifoiler info needed

    TicTac, Apr 25, 2008
    Replies:
    7
    Views:
    20,964
    manyhulls
    Feb 9, 2011
  3. gpb

    Supernova trimaran

    gpb, May 22, 2009 ... 3 4 5
    Replies:
    63
    Views:
    21,322
    amphibian
    Jul 16, 2015
  4. blackdaisies

    Question about Lively 28 Hartley plans

    blackdaisies, Sep 21, 2009 ... 2 3
    Replies:
    31
    Views:
    21,365
    boat fan
    Nov 22, 2009
  5. RHough

    Multi speed/length relationship?

    RHough, May 17, 2008 ... 4 5 6
    Replies:
    89
    Views:
    21,366
    Erwan
    Aug 2, 2008
  6. pir8ped

    Commercial fishing trimaran?

    pir8ped, Jun 7, 2008 ... 3 4 5
    Replies:
    67
    Views:
    21,503
    entropy
    Mar 22, 2009
  7. Pericles

    Underwater hull form for sailing catamarans

    Pericles, Jan 7, 2008 ... 2 3 4
    Replies:
    56
    Views:
    21,853
    oldsailor7
    Oct 31, 2008
  8. HydroNick

    Gougeon Wing Mast Plans

    HydroNick, Apr 4, 2010 ... 2 3
    Replies:
    37
    Views:
    21,939
    ThomD
    Apr 18, 2021
  9. Boreas

    Hobby Kat

    Boreas, Apr 7, 2008 ... 2 3
    Replies:
    44
    Views:
    21,983
    bruceb
    Oct 17, 2011
  10. OldYachtie

    Calculating beam scantlings for catamarans

    OldYachtie, Aug 8, 2006 ... 2 3
    Replies:
    33
    Views:
    22,212
    langdon2
    May 30, 2011
  11. Becaris

    Bi-Plane rig on a 20m cat

    Becaris, Jun 28, 2010 ... 3 4 5
    Replies:
    71
    Views:
    22,483
    scape
    Mar 8, 2014
  12. Corley

    New range of Tony Grainger Trimarans

    Corley, Jul 28, 2012 ... 4 5 6
    Replies:
    79
    Views:
    22,524
    Corley
    Aug 19, 2016
  13. groper

    Catamaran composite beam design

    groper, Apr 29, 2012 ... 5 6 7
    Replies:
    92
    Views:
    22,843
    rxcomposite
    May 4, 2012
  14. terhohalme

    Building small cruising catamaran

    terhohalme, Dec 31, 2007
    Replies:
    7
    Views:
    22,852
    terhohalme
    Jul 28, 2008
  15. Corley

    Kurt Hughes updated Trikala 19 trimaran

    Corley, Jan 28, 2013 ... 4 5 6
    Replies:
    78
    Views:
    22,995
    W17 designer
    Mar 29, 2014
  16. Doug Lord

    Weta Trimaran-Sailing Worlds Best Dinghy

    Doug Lord, Jan 4, 2010 ... 2 3
    Replies:
    35
    Views:
    23,051
    Doug Lord
    Nov 3, 2016
  17. simon

    Quick building strategies

    simon, Oct 17, 2007 ... 4 5 6
    Replies:
    86
    Views:
    23,439
    doug kay
    Dec 3, 2007
  18. terryI

    1977 26' simpson-wild trimaran

    terryI, Jan 7, 2008 ... 2 3
    Replies:
    44
    Views:
    23,564
    DAVID B CLANTON
    Feb 27, 2021
  19. ar99kid

    trimaran removing centerboard

    ar99kid, Mar 12, 2013 ... 2 3 4
    Replies:
    49
    Views:
    23,781
    ar99kid
    Mar 18, 2013
  20. Doug Lord
    Locked

    AC 45 World Championship Cheating??

    Doug Lord, Aug 10, 2013 ... 14 15 16
    Replies:
    237
    Views:
    23,874
    Boat Design Net Moderator
    Apr 13, 2014
  21. PerthMini40man

    Foiling radio control trimarans

    PerthMini40man, Jun 9, 2016 ... 11 12 13
    Replies:
    187
    Views:
    23,903
    bluefish44
    Aug 8, 2019
  22. BobH

    open bridgedeck catamaran design

    BobH, Apr 17, 2015 ... 2 3 4
    Replies:
    59
    Views:
    24,091
    brian eiland
    Apr 4, 2017
  23. Trevlyns

    Asymmetric hulls

    Trevlyns, Oct 15, 2006 ... 2 3
    Replies:
    33
    Views:
    24,328
    DCockey
    Sep 22, 2020
  24. mihari

    28' sail cat

    mihari, Sep 4, 2009 ... 5 6 7
    Replies:
    93
    Views:
    24,434
    Elmo
    Dec 23, 2009
  25. Doug Lord

    "Mayfly"-A Class Catamaran-Fischer

    Doug Lord, Sep 7, 2011 ... 2 3 4
    Replies:
    48
    Views:
    24,469
    Doug Lord
    Jan 13, 2012
  26. Chris Ostlind
    Locked

    A New Beach Trimaran

    Chris Ostlind, Oct 22, 2008 ... 3 4 5
    Replies:
    62
    Views:
    24,634
    idkfa
    Mar 17, 2009
  27. Fanie

    Anti Capsize / Damage and Sails

    Fanie, Dec 8, 2007 ... 6 7 8
    Replies:
    114
    Views:
    24,659
    yipster
    May 22, 2008
  28. mmutch

    Long term survival boat ideas

    mmutch, Nov 9, 2012 ... 13 14 15
    Replies:
    218
    Views:
    24,792
    masalai
    Jan 17, 2013
  29. DennisRB

    Catamaran tender to replace rib?

    DennisRB, Jul 4, 2014 ... 3 4 5
    Replies:
    73
    Views:
    24,929
    Jolly Mon
    Jul 2, 2019
  30. Doug Lord

    Planing Catamaran!

    Doug Lord, Dec 4, 2009 ... 2 3 4
    Replies:
    52
    Views:
    24,969
    pogo
    Jul 24, 2010
  31. langdon2

    Trimaran crossbeam calculations

    langdon2, Jun 5, 2011 ... 5 6 7
    Replies:
    98
    Views:
    26,000
    Richard Woods
    Jun 13, 2011
  32. Doug Lord

    NACRA 20 with Lifting Foils!

    Doug Lord, Oct 17, 2009 ... 2
    Replies:
    23
    Views:
    26,346
    Doug Lord
    Jun 21, 2011
  33. rapscallion

    2014 everglades challenge

    rapscallion, Oct 14, 2013 ... 11 12 13
    Replies:
    194
    Views:
    26,563
    Blackburn
    Apr 1, 2014
  34. marshmat

    Multi-masted sailing cats

    marshmat, Jan 3, 2009 ... 5 6 7
    Replies:
    100
    Views:
    26,747
    marshmat
    Jan 2, 2010
  35. cardsinplay

    Route du Rhum Underway

    cardsinplay, Oct 31, 2010 ... 11 12 13
    Replies:
    184
    Views:
    26,790
    cardsinplay
    Nov 28, 2010
  36. Doug Lord

    Little America's Cup UK 2013

    Doug Lord, May 8, 2011 ... 8 9 10
    Replies:
    137
    Views:
    26,808
    Doug Lord
    Mar 14, 2014
  37. valter.f

    Work Catamaran Hull Lines

    valter.f, Aug 17, 2014 ... 2 3
    Replies:
    35
    Views:
    26,991
    valter.f
    Aug 22, 2014
  38. Saylaman

    Anyone used pine for strip planking?

    Saylaman, Feb 18, 2008 ... 2 3
    Replies:
    30
    Views:
    27,021
    TTS
    May 15, 2008
  39. SSEleanor

    Cathedral Hulls??

    SSEleanor, Apr 6, 2008
    Replies:
    6
    Views:
    27,061
    Spiv
    Apr 8, 2008
  40. Doug Lord

    21' to 30' Trimarans

    Doug Lord, Jul 23, 2012 ... 2 3 4
    Replies:
    51
    Views:
    27,451
    Doug Lord
    Sep 7, 2012
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