Multihulls

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

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  1. Konstanty

    Tanker proa

    Konstanty, Apr 18, 2016 ... 5 6 7
    Replies:
    97
    Views:
    16,621
    gonzo
    Apr 18, 2018
  2. Dolfiman

    Ultim Tri Macif round the world in solo

    Dolfiman, Nov 4, 2017 ... 5 6 7
    Replies:
    97
    Views:
    11,627
    Doug Lord
    Jan 26, 2018
  3. Jetboy

    Folding arm materials - Any reason not to use Aluminum?

    Jetboy, Feb 7, 2012 ... 5 6 7
    Replies:
    97
    Views:
    16,501
    gypsy28
    Jul 31, 2012
  4. Doug Lord

    18' Trimaran vs F18 Catamaran

    Doug Lord, Jun 13, 2010 ... 5 6 7
    Replies:
    96
    Views:
    42,344
    Doug Lord
    Nov 17, 2010
  5. rallard

    carbon fiber wing mast for my cat

    rallard, Dec 28, 2008 ... 5 6 7
    Replies:
    95
    Views:
    58,125
    rallard
    Nov 15, 2011
  6. bjn

    Self righting multihull?

    bjn, Feb 27, 2018 ... 5 6 7
    Replies:
    94
    Views:
    16,589
    ALL AT SEA
    Nov 3, 2023
  7. Gary Baigent

    single handing 100 foot multihulls

    Gary Baigent, Oct 31, 2010 ... 5 6 7
    Replies:
    93
    Views:
    12,495
    monocat
    Nov 18, 2010
  8. mihari

    28' sail cat

    mihari, Sep 4, 2009 ... 5 6 7
    Replies:
    93
    Views:
    28,334
    Elmo
    Dec 23, 2009
  9. groper

    Catamaran composite beam design

    groper, Apr 29, 2012 ... 5 6 7
    Replies:
    92
    Views:
    27,803
    rxcomposite
    May 4, 2012
  10. rayaldridge

    Little Catamarans Vs. Little Trimarans for Beachcamping

    rayaldridge, Aug 17, 2008 ... 5 6 7
    Replies:
    92
    Views:
    88,058
    Skywoolf
    Jul 15, 2010
  11. CatBuilder

    Single Dagger Board vs Double Boards

    CatBuilder, Apr 26, 2011 ... 5 6 7
    Replies:
    91
    Views:
    23,984
    DennisRB
    May 31, 2021
  12. warwick

    gybing center boards

    warwick, Jul 4, 2012 ... 5 6 7
    Replies:
    91
    Views:
    15,698
    warwick
    Jul 11, 2012
  13. wannabeboater

    fast cats

    wannabeboater, Jul 14, 2009 ... 5 6 7
    Replies:
    91
    Views:
    15,391
    wannabeboater
    Jul 21, 2009
  14. yoram

    need help in building a small catamaran

    yoram, Nov 18, 2010 ... 5 6 7
    Replies:
    90
    Views:
    93,229
    dstgean
    Dec 2, 2010
  15. erikhaha

    Stitch & glue outrigger to glass inside or not?

    erikhaha, Jun 12, 2010 ... 5 6 7
    Replies:
    90
    Views:
    16,116
    apex1
    Jun 23, 2010
  16. catsketcher

    Good reasons NOT to design

    catsketcher, Aug 9, 2006 ... 5 6 7
    Replies:
    90
    Views:
    18,710
    Richard Atkin
    Jan 25, 2008
  17. ondarvr

    Some good deals on multi hulls

    ondarvr, Sep 7, 2017 ... 4 5 6
    Replies:
    89
    Views:
    9,964
    groper
    Oct 14, 2017
  18. Corley

    Team Australia set to depart on Sydney to Auckland record attempt

    Corley, Oct 15, 2013 ... 4 5 6
    Replies:
    89
    Views:
    13,059
    Corley
    Oct 27, 2014
  19. RHough

    Multi speed/length relationship?

    RHough, May 17, 2008 ... 4 5 6
    Replies:
    89
    Views:
    25,413
    Erwan
    Aug 2, 2008
  20. Maciek188

    Catamaran vs Trimaran

    Maciek188, Jul 17, 2005 ... 4 5 6
    Replies:
    88
    Views:
    77,820
    oscarvan
    May 31, 2009
  21. motorcat

    New sail TNT 34

    motorcat, Feb 25, 2010 ... 4 5 6
    Replies:
    87
    Views:
    37,138
    champ0815
    Jan 6, 2013
  22. bearflag

    Chris White Atlantic 47, MastFoil

    bearflag, Nov 21, 2011 ... 4 5 6
    Replies:
    86
    Views:
    37,112
    Nico Crispi
    Jul 30, 2017
  23. simon

    Quick building strategies

    simon, Oct 17, 2007 ... 4 5 6
    Replies:
    86
    Views:
    26,628
    doug kay
    Dec 3, 2007
  24. cutawaycafe

    Biplane rigs

    cutawaycafe, May 15, 2013 ... 4 5 6
    Replies:
    85
    Views:
    37,965
    brian eiland
    Jul 8, 2020
  25. Doug Lord

    Everglades Challenge: the Right Boat?

    Doug Lord, Mar 5, 2016 ... 4 5 6
    Replies:
    85
    Views:
    19,851
    Doug Lord
    Apr 5, 2016
  26. caiman

    Foil Ratio

    caiman, Dec 26, 2010 ... 4 5 6
    Replies:
    84
    Views:
    13,967
    caiman
    Jul 31, 2011
  27. terhohalme

    How to dimension a sailing catamaran?

    terhohalme, Apr 27, 2008 ... 4 5 6
    Replies:
    83
    Views:
    54,612
    Andre Holanda
    Aug 18, 2021
  28. Alex.A

    Proa Hulls

    Alex.A, May 21, 2010 ... 4 5 6
    Replies:
    83
    Views:
    19,412
    Alex.A
    Jul 8, 2010
  29. bruceb

    Light floats

    bruceb, Dec 2, 2012 ... 4 5 6
    Replies:
    82
    Views:
    12,507
    bruceb
    Jan 15, 2013
  30. Corley

    Ted Warren new Ultralight 20 trimaran

    Corley, Aug 29, 2012 ... 4 5 6
    Replies:
    81
    Views:
    23,536
    Doug Lord
    Jul 26, 2016
  31. Gus7119

    A Frame Masts

    Gus7119, Jan 20, 2016 ... 4 5 6
    Replies:
    81
    Views:
    17,913
    Steveso
    Feb 18, 2016
  32. DennisRB

    l'hydroptere.ch

    DennisRB, Oct 11, 2010 ... 4 5 6
    Replies:
    81
    Views:
    21,026
    Doug Lord
    Sep 4, 2014
  33. rayaldridge

    Small trailerable cruising cats... biggest flaw?

    rayaldridge, Nov 18, 2010 ... 4 5 6
    Replies:
    81
    Views:
    40,462
    rayaldridge
    Jul 25, 2011
  34. Fanie

    Hull Shape as Keel

    Fanie, May 27, 2008 ... 4 5 6
    Replies:
    81
    Views:
    14,658
    Fanie
    Jun 15, 2008
  35. Corley

    Transat Jacques Vabre 2013, MOD70 & Multi50

    Corley, Sep 17, 2013 ... 4 5 6
    Replies:
    80
    Views:
    10,136
    Corley
    Dec 2, 2013
  36. Tom Makes Things

    Non-foiling trimarans under 20'

    Tom Makes Things, Sep 25, 2019 ... 4 5 6
    Replies:
    79
    Views:
    19,639
    kleppar
    Jun 10, 2021
  37. Corley

    New range of Tony Grainger Trimarans

    Corley, Jul 28, 2012 ... 4 5 6
    Replies:
    79
    Views:
    26,473
    Corley
    Aug 19, 2016
  38. basildog

    Assymetric Cat Hulls

    basildog, Apr 8, 2009 ... 4 5 6
    Replies:
    79
    Views:
    50,473
    Ikarus342000
    Jun 10, 2015
  39. Doug Lord

    Movable Ballast for Small Multihulls / Self-Righting?

    Doug Lord, Nov 27, 2010 ... 4 5 6
    Replies:
    79
    Views:
    18,512
    Doug Lord
    Dec 22, 2010
  40. Mark O Hara

    Changing Catamaran Beams from Wood to Composite.

    Mark O Hara, Aug 4, 2020 ... 4 5 6
    Replies:
    78
    Views:
    13,669
    brian eiland
    Aug 28, 2020
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