Multihulls

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

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  1. Forecaddie

    25 foot 7.5m Dura research

    Forecaddie, Nov 28, 2023 at 2:25 AM
    Replies:
    1
    Views:
    261
    bajansailor
    Nov 28, 2023 at 8:38 AM
  2. Bob McDowell

    Where did Uffa Fox sail Shearwater Catamaran 990?

    Bob McDowell, Nov 26, 2023 at 11:28 AM
    Replies:
    3
    Views:
    471
    Bob McDowell
    Nov 28, 2023 at 3:42 AM
  3. Joseph Guthrie

    Outboard motor sled design

    Joseph Guthrie, Nov 14, 2023
    Replies:
    3
    Views:
    728
    Joseph Guthrie
    Nov 15, 2023
  4. Manfred.pech

    Wingmaran

    Manfred.pech, Nov 6, 2023
    Replies:
    2
    Views:
    545
    Manfred.pech
    Nov 8, 2023
  5. power boater

    Duet launch

    power boater, Nov 4, 2023
    Replies:
    14
    Views:
    693
    power boater
    Nov 5, 2023
  6. Forecaddie

    Scaled model how to calculate weight

    Forecaddie, Oct 29, 2023
    Replies:
    10
    Views:
    1,189
    gonzo
    Nov 9, 2023
  7. waterbear

    Gougeonified Chat 18 knockabout

    waterbear, Oct 27, 2023
    Replies:
    6
    Views:
    656
    kapnD
    Oct 28, 2023
  8. Tyler DeWitt

    How to assess bulkhead strength of completed boat

    Tyler DeWitt, Oct 27, 2023
    Replies:
    7
    Views:
    794
    gonzo
    Oct 30, 2023
  9. Forecaddie

    10 meter proa sail rig options

    Forecaddie, Oct 18, 2023
    Replies:
    10
    Views:
    1,162
    ALL AT SEA
    Oct 27, 2023
  10. David Swingler

    Design idea for a 15' cruising cat

    David Swingler, Oct 16, 2023
    Replies:
    13
    Views:
    1,479
    Will Gilmore
    Nov 28, 2023 at 1:45 PM
  11. mrlonely

    Catamaran Strength Analysis

    mrlonely, Oct 10, 2023
    Replies:
    6
    Views:
    941
    Ad Hoc
    Oct 12, 2023
  12. Matt Wiseman

    Normon Cross Trimarans

    Matt Wiseman, Oct 7, 2023
    Replies:
    4
    Views:
    619
    Matt Wiseman
    Oct 7, 2023
  13. Holden

    Trimaran Build

    Holden, Oct 2, 2023
    Replies:
    7
    Views:
    910
    kapnD
    Oct 5, 2023
  14. Steel Hull

    FAO 7.8 meter trimaran ocean capable?

    Steel Hull, Sep 30, 2023
    Replies:
    7
    Views:
    1,080
    waterbear
    Oct 6, 2023
  15. alan craig

    weymouth speed week 1973

    alan craig, Sep 24, 2023
    Replies:
    5
    Views:
    538
    alan craig
    Sep 26, 2023
  16. TeeKay

    Any Seawind 24 owners on here?

    TeeKay, Sep 21, 2023
    Replies:
    8
    Views:
    969
    Corley_01
    Sep 28, 2023
  17. willy13

    Gemini Catamaran, new builds?

    willy13, Sep 12, 2023
    Replies:
    3
    Views:
    847
    comfisherman
    Sep 13, 2023
  18. Pat Ross

    Daggerboads - Down/Up/Removed

    Pat Ross, Sep 8, 2023
    Replies:
    2
    Views:
    748
    TeeKay
    Sep 21, 2023
  19. Jp de B

    Best free CAD for trimaran design

    Jp de B, Sep 8, 2023
    Replies:
    2
    Views:
    641
    Jp de B
    Sep 8, 2023
  20. Kurtz

    24ft Wa'apa / Hobie 16 mashup / shelter pod

    Kurtz, Aug 28, 2023
    Replies:
    9
    Views:
    1,107
    Kurtz
    Sep 1, 2023
  21. rael dobkins

    Time is Money.... They say, we disagree!

    rael dobkins, Aug 26, 2023
    Replies:
    2
    Views:
    618
    rael dobkins
    Aug 26, 2023
  22. Joseph Guthrie

    Designs of catamarans not in metric but SAE

    Joseph Guthrie, Aug 24, 2023 ... 2
    Replies:
    15
    Views:
    1,419
    DogCavalry
    Sep 30, 2023
  23. Tony Kopp

    A challenging design

    Tony Kopp, Aug 23, 2023 ... 3 4 5
    Replies:
    61
    Views:
    5,501
    Tony Kopp
    Nov 22, 2023
  24. pmudesign

    Outrigger canoe Ama design considerations

    pmudesign, Aug 22, 2023 ... 3 4 5
    Replies:
    63
    Views:
    4,820
    Paul Scott
    Oct 1, 2023
  25. AdrianN

    Why double purchase halyards?

    AdrianN, Aug 20, 2023
    Replies:
    13
    Views:
    1,301
    latestarter
    Sep 6, 2023
  26. Air Tahiti

    Cross Beam thoughts for small Tri

    Air Tahiti, Aug 20, 2023 ... 2
    Replies:
    24
    Views:
    1,402
    Air Tahiti
    Aug 26, 2023
  27. rael dobkins

    Proa Rudders, Fold up, Kick Up, Balkan Style...

    rael dobkins, Aug 14, 2023
    Replies:
    0
    Views:
    417
    rael dobkins
    Aug 14, 2023
  28. revintage

    Old Tornado class rules

    revintage, Aug 11, 2023
    Replies:
    3
    Views:
    520
    revintage
    Aug 12, 2023
  29. robert shuman

    What kind of Cat is this?

    robert shuman, Aug 6, 2023
    Replies:
    9
    Views:
    960
    robert shuman
    Aug 10, 2023
  30. Tiny Turnip

    Unstayed mast build for small canoe based trimaran.

    Tiny Turnip, Aug 5, 2023 ... 2
    Replies:
    17
    Views:
    1,587
    Tiny Turnip
    Aug 10, 2023
  31. seandepagnier

    daggerboards rake angle

    seandepagnier, Aug 2, 2023
    Replies:
    0
    Views:
    573
    seandepagnier
    Aug 2, 2023
  32. Sylvain Savoie

    Looking for a build plan for a tuff trailerable, weekender, beachable trimaran?

    Sylvain Savoie, Jul 31, 2023 ... 2
    Replies:
    23
    Views:
    2,557
    Steel Hull
    Sep 30, 2023
  33. Rob T

    I think I made a mistake (building a vinta)

    Rob T, Jul 17, 2023
    Replies:
    6
    Views:
    857
    Rob T
    Jul 17, 2023
  34. revintage

    Dual pair shrouds on trimaran

    revintage, Jul 7, 2023
    Replies:
    6
    Views:
    1,135
    revintage
    Jul 11, 2023
  35. Skip Johnson

    Proa Registration

    Skip Johnson, Jul 1, 2023
    Replies:
    3
    Views:
    955
    fallguy
    Jul 3, 2023
  36. cando2

    a multihull design riddle

    cando2, Jun 11, 2023 ... 2 3
    Replies:
    35
    Views:
    3,910
    cavalier mk2
    Jul 1, 2023
  37. bolero105

    Cutting portlights into topsides

    bolero105, Jun 9, 2023
    Replies:
    13
    Views:
    1,980
    fallguy
    Jul 20, 2023
  38. seandepagnier

    storm sail on older trimarans

    seandepagnier, Jun 5, 2023
    Replies:
    1
    Views:
    793
    cavalier mk2
    Jun 6, 2023
  39. Forecaddie

    stabiliser Ama for small power tri

    Forecaddie, Jun 2, 2023
    Replies:
    1
    Views:
    642
    SolGato
    Jun 2, 2023
  40. Pete222

    Cause of slamming on Gemini 105MC

    Pete222, May 31, 2023
    Replies:
    6
    Views:
    805
    guzzis3
    Jun 1, 2023
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