Multihulls

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

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  1. oldmulti

    Multihull Structure Thoughts

    oldmulti, May 27, 2019 ... 313 314 315
    Replies:
    4,711
    Views:
    1,434,994
    oldmulti
    Nov 9, 2025 at 10:51 PM
  2. Doug Lord

    Eagle Class 53 Catamaran Foiler

    Doug Lord, Jul 26, 2018
    Replies:
    9
    Views:
    5,148
    brian eiland
    Nov 5, 2025 at 3:59 PM
  3. Robert Biegler

    Patin a Vela or Patín Catalán

    Robert Biegler, Nov 3, 2025
    Replies:
    4
    Views:
    293
    Robert Biegler
    Nov 4, 2025 at 3:37 PM
  4. Davodinkum

    1968 H Nicol 35' Wanderer (longfloat)

    Davodinkum, Oct 9, 2025
    Replies:
    7
    Views:
    401
    cavalier mk2
    Oct 16, 2025
  5. Wrekin

    Stretching a trimaran

    Wrekin, Oct 4, 2025
    Replies:
    3
    Views:
    429
    peterbike
    Oct 6, 2025
  6. montero

    Water World Orma60

    montero, Oct 5, 2025
    Replies:
    0
    Views:
    316
    montero
    Oct 5, 2025
  7. Scuff

    Robert Harris Eclipse

    Scuff, Oct 1, 2025
    Replies:
    2
    Views:
    373
    Scuff
    Oct 3, 2025
  8. yabert

    45' solar catamaran

    yabert, Nov 25, 2024 ... 10 11 12
    Replies:
    165
    Views:
    15,640
    yabert
    Sep 29, 2025
  9. BGW

    Wharram and webbing beam straps

    BGW, Aug 24, 2025 ... 3 4 5
    Replies:
    72
    Views:
    4,698
    BGW
    Sep 21, 2025
  10. rapscallion

    Gougeon 32 catamaran

    rapscallion, Jul 11, 2011 ... 2 3
    Replies:
    44
    Views:
    21,337
    BlueBell
    Sep 12, 2025
  11. skier

    Moana Outrigger Sailing Canoe

    skier, Jun 26, 2025
    Replies:
    14
    Views:
    1,855
    Igor
    Sep 7, 2025
  12. John Bjorklund

    Sail advice for Wa'apa outrigger sailing canoe

    John Bjorklund, Sep 2, 2025
    Replies:
    13
    Views:
    2,090
    waterbear
    Sep 7, 2025
  13. TrimaranMan

    My Trimaran and catamaran website

    TrimaranMan, Jun 3, 2025
    Replies:
    2
    Views:
    1,218
    TrimaranMan
    Aug 20, 2025
  14. John Bjorklund

    Outrigger made with polypropylene foam roller

    John Bjorklund, Aug 18, 2025
    Replies:
    3
    Views:
    788
    ondarvr
    Aug 19, 2025
  15. John Bjorklund

    Wa'apa fiberglass question

    John Bjorklund, Aug 12, 2025
    Replies:
    13
    Views:
    990
    Kurtz
    Aug 18, 2025
  16. Iridian

    Hobie 20 Electric Motor Sizing

    Iridian, Aug 10, 2025
    Replies:
    10
    Views:
    899
    SolGato
    Aug 12, 2025
  17. Iridian

    Considering Homebuilding a ~50' Catamaran

    Iridian, Jun 10, 2021 ... 3 4 5
    Replies:
    74
    Views:
    21,396
    waterbear
    Aug 12, 2025
  18. sailingsunstar2

    recognize this multihull?

    sailingsunstar2, Jun 9, 2024
    Replies:
    14
    Views:
    3,013
    kdifzero
    Aug 9, 2025
  19. Juno7

    Scaling a Jarcat up by 4 percent?

    Juno7, Aug 7, 2025 ... 2
    Replies:
    20
    Views:
    1,343
    gonzo
    Aug 8, 2025
  20. Brian Fanner

    Flyfishing kick boat cat

    Brian Fanner, Jul 6, 2020 ... 2 3
    Replies:
    32
    Views:
    6,431
    portacruise
    Aug 5, 2025
  21. Jagarwal

    Catamaran crossbeam design

    Jagarwal, Oct 9, 2024
    Replies:
    6
    Views:
    2,373
    Jagarwal
    Aug 3, 2025
  22. bolero105

    Cutting portlights into topsides

    bolero105, Jun 9, 2023 ... 2
    Replies:
    16
    Views:
    3,860
    bolero105
    Aug 3, 2025
  23. Boardmanlake

    Catamaran identification

    Boardmanlake, Aug 2, 2025
    Replies:
    3
    Views:
    501
    oldmulti
    Aug 3, 2025
  24. magwas

    Multihull microcruiser design (capsize approach, vol 2)

    magwas, Feb 5, 2025 ... 2 3
    Replies:
    36
    Views:
    4,683
    gonzo
    Jul 26, 2025
  25. Stenn

    Kelsall SunCat 36 hull design plans ?

    Stenn, Jul 6, 2025
    Replies:
    2
    Views:
    760
    tane
    Jul 19, 2025
  26. Jardel de Olivenbaun

    Model from a study plan

    Jardel de Olivenbaun, Jun 19, 2025 ... 2
    Replies:
    24
    Views:
    2,290
    Jardel de Olivenbaun
    Jul 17, 2025
  27. MichaelRoberts

    Connecting Dyneema shrouds to rotating mast

    MichaelRoberts, Jul 10, 2025
    Replies:
    3
    Views:
    690
    gonzo
    Jul 11, 2025
  28. lucdekeyser

    80 foot cargo harryproa

    lucdekeyser, Nov 15, 2020 ... 10 11 12
    Replies:
    178
    Views:
    57,533
    rob denney
    Jul 8, 2025
  29. skier

    Gary Dierking Outrigger Canoes

    skier, Jun 28, 2025
    Replies:
    13
    Views:
    1,754
    fallguy
    Jul 3, 2025
  30. MichaelRoberts

    Forestay design

    MichaelRoberts, Jun 22, 2024
    Replies:
    5
    Views:
    1,651
    MichaelRoberts
    Jul 3, 2025
  31. Mulkari

    Designing a fast open deck catamaran

    Mulkari, Nov 26, 2024 ... 9 10 11
    Replies:
    156
    Views:
    22,924
    cando2
    Jun 16, 2025
  32. Mads Prag Roesen

    Balance of a trimaran: NEEL 51

    Mads Prag Roesen, May 12, 2025
    Replies:
    12
    Views:
    1,617
    CarlosK2
    Jun 10, 2025
  33. MichaelRoberts

    Chinese electric winch?

    MichaelRoberts, Apr 22, 2024
    Replies:
    6
    Views:
    2,461
    starcmr
    Jun 10, 2025
  34. revintage

    Small trimaran with Tornado/Nacra 5.8 center hull

    revintage, Dec 25, 2021 ... 3 4 5
    Replies:
    64
    Views:
    22,308
    patzefran
    May 28, 2025
  35. etoimene

    KHSD demountable 27 or 30 ft catamaran

    etoimene, May 25, 2025
    Replies:
    12
    Views:
    1,305
    etoimene
    May 27, 2025
  36. Dolfiman

    Ultim at full speed on rough sea

    Dolfiman, May 14, 2025
    Replies:
    3
    Views:
    945
    redreuben
    May 25, 2025
  37. Bigfork

    Mashup Trimaran (continued)

    Bigfork, Feb 17, 2021 ... 4 5 6
    Replies:
    77
    Views:
    22,384
    Bigfork
    May 24, 2025
  38. cando2

    questions and ideas for rob denney

    cando2, Jun 13, 2024 ... 2 3 4
    Replies:
    46
    Views:
    9,647
    rob denney
    May 11, 2025
  39. Kurtz

    Adjustable float dihedral

    Kurtz, Apr 23, 2025
    Replies:
    14
    Views:
    1,511
    Kurtz
    Apr 30, 2025
  40. Paul Scott

    Has there been any discussion of this?

    Paul Scott, Apr 23, 2025
    Replies:
    4
    Views:
    1,136
    jehardiman
    Apr 25, 2025
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