Multihulls

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

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  1. Scuff

    Argonauta stress fracture triage

    Scuff, Nov 13, 2025
    Replies:
    7
    Views:
    719
    Rumars
    Nov 14, 2025
  2. Doug Lord

    Eagle Class 53 Catamaran Foiler

    Doug Lord, Jul 26, 2018
    Replies:
    9
    Views:
    5,797
    brian eiland
    Nov 5, 2025
  3. Robert Biegler

    Patin a Vela or Patín Catalán

    Robert Biegler, Nov 3, 2025
    Replies:
    4
    Views:
    1,266
    Robert Biegler
    Nov 4, 2025
  4. Davodinkum

    1968 H Nicol 35' Wanderer (longfloat)

    Davodinkum, Oct 9, 2025
    Replies:
    7
    Views:
    994
    cavalier mk2
    Oct 16, 2025
  5. Wrekin

    Stretching a trimaran

    Wrekin, Oct 4, 2025
    Replies:
    3
    Views:
    999
    peterbike
    Oct 6, 2025
  6. montero

    Water World Orma60

    montero, Oct 5, 2025
    Replies:
    0
    Views:
    689
    montero
    Oct 5, 2025
  7. Scuff

    Robert Harris Eclipse

    Scuff, Oct 1, 2025
    Replies:
    2
    Views:
    781
    Scuff
    Oct 3, 2025
  8. rapscallion

    Gougeon 32 catamaran

    rapscallion, Jul 11, 2011 ... 2 3
    Replies:
    44
    Views:
    22,618
    BlueBell
    Sep 12, 2025
  9. skier

    Moana Outrigger Sailing Canoe

    skier, Jun 26, 2025
    Replies:
    14
    Views:
    3,608
    Igor
    Sep 7, 2025
  10. John Bjorklund

    Sail advice for Wa'apa outrigger sailing canoe

    John Bjorklund, Sep 2, 2025
    Replies:
    13
    Views:
    3,080
    waterbear
    Sep 7, 2025
  11. TrimaranMan

    My Trimaran and catamaran website

    TrimaranMan, Jun 3, 2025
    Replies:
    2
    Views:
    1,912
    TrimaranMan
    Aug 20, 2025
  12. John Bjorklund

    Outrigger made with polypropylene foam roller

    John Bjorklund, Aug 18, 2025
    Replies:
    3
    Views:
    1,275
    ondarvr
    Aug 19, 2025
  13. John Bjorklund

    Wa'apa fiberglass question

    John Bjorklund, Aug 12, 2025
    Replies:
    13
    Views:
    1,606
    Kurtz
    Aug 18, 2025
  14. Iridian

    Hobie 20 Electric Motor Sizing

    Iridian, Aug 10, 2025
    Replies:
    10
    Views:
    1,352
    SolGato
    Aug 12, 2025
  15. Iridian

    Considering Homebuilding a ~50' Catamaran

    Iridian, Jun 10, 2021 ... 3 4 5
    Replies:
    74
    Views:
    24,550
    waterbear
    Aug 12, 2025
  16. sailingsunstar2

    recognize this multihull?

    sailingsunstar2, Jun 9, 2024
    Replies:
    14
    Views:
    3,640
    kdifzero
    Aug 9, 2025
  17. Juno7

    Scaling a Jarcat up by 4 percent?

    Juno7, Aug 7, 2025 ... 2
    Replies:
    20
    Views:
    2,356
    gonzo
    Aug 8, 2025
  18. Jagarwal

    Catamaran crossbeam design

    Jagarwal, Oct 9, 2024
    Replies:
    6
    Views:
    3,078
    Jagarwal
    Aug 3, 2025
  19. bolero105

    Cutting portlights into topsides

    bolero105, Jun 9, 2023 ... 2
    Replies:
    16
    Views:
    4,579
    bolero105
    Aug 3, 2025
  20. Boardmanlake

    Catamaran identification

    Boardmanlake, Aug 2, 2025
    Replies:
    3
    Views:
    921
    oldmulti
    Aug 3, 2025
  21. magwas

    Multihull microcruiser design (capsize approach, vol 2)

    magwas, Feb 5, 2025 ... 2 3
    Replies:
    36
    Views:
    6,398
    gonzo
    Jul 26, 2025
  22. Stenn

    Kelsall SunCat 36 hull design plans ?

    Stenn, Jul 6, 2025
    Replies:
    2
    Views:
    1,159
    tane
    Jul 19, 2025
  23. Jardel de Olivenbaun

    Model from a study plan

    Jardel de Olivenbaun, Jun 19, 2025 ... 2
    Replies:
    24
    Views:
    3,477
    Jardel de Olivenbaun
    Jul 17, 2025
  24. MichaelRoberts

    Connecting Dyneema shrouds to rotating mast

    MichaelRoberts, Jul 10, 2025
    Replies:
    3
    Views:
    1,194
    gonzo
    Jul 11, 2025
  25. skier

    Gary Dierking Outrigger Canoes

    skier, Jun 28, 2025
    Replies:
    13
    Views:
    3,312
    fallguy
    Jul 3, 2025
  26. MichaelRoberts

    Forestay design

    MichaelRoberts, Jun 22, 2024
    Replies:
    5
    Views:
    2,085
    MichaelRoberts
    Jul 3, 2025
  27. Mulkari

    Designing a fast open deck catamaran

    Mulkari, Nov 26, 2024 ... 9 10 11
    Replies:
    156
    Views:
    30,005
    cando2
    Jun 16, 2025
  28. Mads Prag Roesen

    Balance of a trimaran: NEEL 51

    Mads Prag Roesen, May 12, 2025
    Replies:
    12
    Views:
    2,868
    CarlosK2
    Jun 10, 2025
  29. MichaelRoberts

    Chinese electric winch?

    MichaelRoberts, Apr 22, 2024
    Replies:
    6
    Views:
    3,197
    starcmr
    Jun 10, 2025
  30. etoimene

    KHSD demountable 27 or 30 ft catamaran

    etoimene, May 25, 2025
    Replies:
    12
    Views:
    2,049
    etoimene
    May 27, 2025
  31. Dolfiman

    Ultim at full speed on rough sea

    Dolfiman, May 14, 2025
    Replies:
    3
    Views:
    1,339
    redreuben
    May 25, 2025
  32. Bigfork

    Mashup Trimaran (continued)

    Bigfork, Feb 17, 2021 ... 4 5 6
    Replies:
    77
    Views:
    24,835
    Bigfork
    May 24, 2025
  33. cando2

    questions and ideas for rob denney

    cando2, Jun 13, 2024 ... 2 3 4
    Replies:
    46
    Views:
    11,469
    rob denney
    May 11, 2025
  34. Kurtz

    Adjustable float dihedral

    Kurtz, Apr 23, 2025
    Replies:
    14
    Views:
    2,025
    Kurtz
    Apr 30, 2025
  35. Paul Scott

    Has there been any discussion of this?

    Paul Scott, Apr 23, 2025
    Replies:
    4
    Views:
    1,544
    jehardiman
    Apr 25, 2025
  36. Kurtz

    Stress (stiffness) testing a small tri hull

    Kurtz, Apr 10, 2025 ... 2
    Replies:
    17
    Views:
    3,258
    Kurtz
    Apr 19, 2025
  37. Keith Wilkins

    Leaking Centerboard Pivot bolt

    Keith Wilkins, Mar 31, 2025
    Replies:
    6
    Views:
    1,816
    cando2
    Apr 11, 2025
  38. Doug Lord

    Steve and Dave Clarks UFO

    Doug Lord, Aug 24, 2016 ... 6 7 8
    Replies:
    117
    Views:
    45,116
    CaptainRed
    Apr 10, 2025
  39. Coyote Boats

    Demountable 25-30' catamarans - any used boats out there?

    Coyote Boats, Jan 4, 2025
    Replies:
    2
    Views:
    2,281
    WarrenM
    Apr 8, 2025
  40. fallguy

    River anchoring for a catamaran

    fallguy, Mar 31, 2025 ... 2
    Replies:
    24
    Views:
    3,527
    Will Gilmore
    Apr 5, 2025
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