Multihulls

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

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  1. peterbike

    A bit of sailing history

    peterbike, Dec 21, 2023
    Replies:
    0
    Views:
    1,249
    peterbike
    Dec 21, 2023
  2. Michael Farmer

    Sailing outrigger canoe

    Michael Farmer, Aug 23, 2021 ... 2
    Replies:
    24
    Views:
    11,786
    Keern Haslem
    Dec 19, 2023
  3. Iridian

    Considering Homebuilding a ~50' Catamaran

    Iridian, Jun 10, 2021 ... 3 4 5
    Replies:
    69
    Views:
    18,842
    Air Tahiti
    Dec 17, 2023
  4. 8Petros

    Low-cost experimental platform cat for inland waterways

    8Petros, Dec 2, 2023
    Replies:
    10
    Views:
    2,620
    waterbear
    Dec 8, 2023
  5. trungpv

    Cost for a sail system!

    trungpv, Oct 15, 2014
    Replies:
    9
    Views:
    4,192
    Vijay Krishna
    Dec 7, 2023
  6. power boater

    Duet's consumption report

    power boater, Dec 1, 2023
    Replies:
    5
    Views:
    1,606
    fallguy
    Dec 3, 2023
  7. guzzis3

    Catamaran plans, who have I forgotten ?

    guzzis3, Apr 4, 2023 ... 12 13 14
    Replies:
    200
    Views:
    27,512
    waikikin
    Nov 29, 2023
  8. David Swingler

    Design idea for a 15' cruising cat

    David Swingler, Oct 16, 2023
    Replies:
    13
    Views:
    3,574
    Will Gilmore
    Nov 28, 2023
  9. Bob McDowell

    Where did Uffa Fox sail Shearwater Catamaran 990?

    Bob McDowell, Nov 26, 2023
    Replies:
    3
    Views:
    1,860
    Bob McDowell
    Nov 28, 2023
  10. Tony Kopp

    A challenging design

    Tony Kopp, Aug 23, 2023 ... 3 4 5
    Replies:
    61
    Views:
    10,241
    Tony Kopp
    Nov 22, 2023
  11. Joseph Guthrie

    Outboard motor sled design

    Joseph Guthrie, Nov 14, 2023
    Replies:
    3
    Views:
    1,990
    Joseph Guthrie
    Nov 15, 2023
  12. seadreamer6

    twin masts on cat thoughts on

    seadreamer6, Oct 21, 2012 ... 2
    Replies:
    26
    Views:
    22,614
    brian eiland
    Nov 14, 2023
  13. Forecaddie

    Scaled model how to calculate weight

    Forecaddie, Oct 29, 2023
    Replies:
    10
    Views:
    3,284
    gonzo
    Nov 9, 2023
  14. Manfred.pech

    Wingmaran

    Manfred.pech, Nov 6, 2023
    Replies:
    2
    Views:
    1,639
    Manfred.pech
    Nov 8, 2023
  15. Doug Lord

    50/50 Biplane Cat

    Doug Lord, Jul 5, 2012
    Replies:
    5
    Views:
    10,741
    brian eiland
    Nov 6, 2023
  16. power boater

    Duet launch

    power boater, Nov 4, 2023
    Replies:
    14
    Views:
    1,981
    power boater
    Nov 5, 2023
  17. bjn

    Self righting multihull?

    bjn, Feb 27, 2018 ... 5 6 7
    Replies:
    94
    Views:
    21,778
    ALL AT SEA
    Nov 3, 2023
  18. Tyler DeWitt

    How to assess bulkhead strength of completed boat

    Tyler DeWitt, Oct 27, 2023
    Replies:
    7
    Views:
    2,262
    gonzo
    Oct 30, 2023
  19. waterbear

    Gougeonified Chat 18 knockabout

    waterbear, Oct 27, 2023
    Replies:
    6
    Views:
    1,741
    kapnD
    Oct 28, 2023
  20. Forecaddie

    10 meter proa sail rig options

    Forecaddie, Oct 18, 2023
    Replies:
    10
    Views:
    3,206
    ALL AT SEA
    Oct 27, 2023
  21. TwoBirds

    Dipping lug on a proa?

    TwoBirds, Jan 13, 2018
    Replies:
    13
    Views:
    5,120
    Paul Scott
    Oct 22, 2023
  22. SV Pororoca

    How a proa works / I'm making a 45ft one in Aluminum

    SV Pororoca, Jan 8, 2020 ... 2
    Replies:
    29
    Views:
    10,253
    Ad Hoc
    Oct 19, 2023
  23. mrlonely

    Catamaran Strength Analysis

    mrlonely, Oct 10, 2023
    Replies:
    6
    Views:
    2,571
    Ad Hoc
    Oct 12, 2023
  24. Coastal Ogre

    Multihull Bulkhead Refit Advice

    Coastal Ogre, Mar 1, 2021 ... 2 3
    Replies:
    34
    Views:
    9,292
    brian eiland
    Oct 10, 2023
  25. voodoo child

    Demountable, 30+ to 40+foot Cat design?

    voodoo child, Feb 3, 2023
    Replies:
    13
    Views:
    4,622
    Christo
    Oct 9, 2023
  26. Matt Wiseman

    Normon Cross Trimarans

    Matt Wiseman, Oct 7, 2023
    Replies:
    4
    Views:
    2,042
    Matt Wiseman
    Oct 7, 2023
  27. HydroNick

    Soft Rigging Solutions

    HydroNick, Aug 17, 2013 ... 2 3 4
    Replies:
    47
    Views:
    18,471
    BobBill
    Oct 7, 2023
  28. Holden

    Trimaran Build

    Holden, Oct 2, 2023
    Replies:
    7
    Views:
    3,481
    kapnD
    Oct 5, 2023
  29. member 76956

    HDPE Multihulls Indonesia

    member 76956, May 22, 2022
    Replies:
    2
    Views:
    4,626
    gonzo
    Oct 2, 2023
  30. pmudesign

    Outrigger canoe Ama design considerations

    pmudesign, Aug 22, 2023 ... 3 4 5
    Replies:
    63
    Views:
    12,729
    Paul Scott
    Oct 1, 2023
  31. Joseph Guthrie

    Designs of catamarans not in metric but SAE

    Joseph Guthrie, Aug 24, 2023 ... 2
    Replies:
    15
    Views:
    3,285
    DogCavalry
    Sep 30, 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:
    5,263
    Steel Hull
    Sep 30, 2023
  33. TeeKay

    Any Seawind 24 owners on here?

    TeeKay, Sep 21, 2023
    Replies:
    8
    Views:
    2,461
    Corley_01
    Sep 28, 2023
  34. alan craig

    weymouth speed week 1973

    alan craig, Sep 24, 2023
    Replies:
    5
    Views:
    1,411
    alan craig
    Sep 26, 2023
  35. Pat Ross

    Daggerboads - Down/Up/Removed

    Pat Ross, Sep 8, 2023
    Replies:
    2
    Views:
    1,492
    TeeKay
    Sep 21, 2023
  36. Jp de B

    Best free CAD for trimaran design

    Jp de B, Sep 8, 2023
    Replies:
    2
    Views:
    2,605
    Jp de B
    Sep 8, 2023
  37. AdrianN

    Why double purchase halyards?

    AdrianN, Aug 20, 2023
    Replies:
    13
    Views:
    3,160
    latestarter
    Sep 6, 2023
  38. Kurtz

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

    Kurtz, Aug 28, 2023
    Replies:
    9
    Views:
    2,762
    Kurtz
    Sep 1, 2023
  39. rael dobkins

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

    rael dobkins, Aug 26, 2023
    Replies:
    2
    Views:
    1,283
    rael dobkins
    Aug 26, 2023
  40. Gary Bernier

    1981 52' CSK ketch rigged catamaran

    Gary Bernier, Jul 1, 2021
    Replies:
    3
    Views:
    3,647
    LucasH992
    Aug 23, 2023
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