Multihulls

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

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  1. Gunnar Sommerlund

    SeaRider 360 (Need help with Rigging)

    Gunnar Sommerlund, May 24, 2020 ... 2
    Replies:
    20
    Views:
    6,275
    SolGato
    Jul 14, 2021
  2. Brian Alsum

    Multihull power requirements

    Brian Alsum, May 27, 2021 ... 2 3
    Replies:
    44
    Views:
    8,934
    Dragontri
    Jul 14, 2021
  3. bjn

    Why do multihulls have pointy bows?

    bjn, Jan 22, 2017 ... 6 7 8
    Replies:
    115
    Views:
    23,702
    Iridian
    Jul 11, 2021
  4. rob denney

    Replacing outboard motors with sail in the Marshall islands

    rob denney, Feb 22, 2020 ... 2
    Replies:
    21
    Views:
    5,471
    rob denney
    Jul 10, 2021
  5. Boatguy30

    Catamaran Single Engine One Hull

    Boatguy30, Jul 20, 2012 ... 2 3
    Replies:
    44
    Views:
    23,679
    buzzman
    Jul 1, 2021
  6. Chris71

    Where do I start? Build a Trimaran from an Australian Surf Boat and Hobiecat

    Chris71, Mar 11, 2021 ... 2
    Replies:
    17
    Views:
    5,953
    buzzman
    Jun 30, 2021
  7. rturbett

    Shark Restoration

    rturbett, Jun 29, 2021
    Replies:
    4
    Views:
    1,753
    rturbett
    Jun 30, 2021
  8. perry2222

    Shape of a chainplate that might spread load better?

    perry2222, Jun 26, 2021
    Replies:
    13
    Views:
    2,673
    Blueknarr
    Jun 28, 2021
  9. patrik111

    rig fore aft position limits for catamaran

    patrik111, Jun 24, 2021
    Replies:
    12
    Views:
    2,471
    oldmulti
    Jun 25, 2021
  10. Nordschleife

    Building a “C-Class” Catamaran

    Nordschleife, May 23, 2021 ... 2 3
    Replies:
    34
    Views:
    5,036
    oldmulti
    Jun 25, 2021
  11. Scuff

    Kickup rudder questions

    Scuff, Jun 22, 2021
    Replies:
    9
    Views:
    2,153
    wet feet
    Jun 23, 2021
  12. rael dobkins

    PROA LeePod DESIGN, the different styles....

    rael dobkins, Jun 22, 2021
    Replies:
    0
    Views:
    1,889
    rael dobkins
    Jun 22, 2021
  13. santomas

    Mast corrosion - repair options?

    santomas, May 16, 2021
    Replies:
    11
    Views:
    3,592
    aussiebushman
    Jun 17, 2021
  14. Tom Makes Things

    Non-foiling trimarans under 20'

    Tom Makes Things, Sep 25, 2019 ... 4 5 6
    Replies:
    79
    Views:
    19,427
    kleppar
    Jun 10, 2021
  15. NewSalt

    Proa Shunting in Heavy Weather

    NewSalt, May 3, 2021 ... 2 3 4
    Replies:
    59
    Views:
    9,786
    rob denney
    Jun 7, 2021
  16. CatBuilder

    Single Dagger Board vs Double Boards

    CatBuilder, Apr 26, 2011 ... 5 6 7
    Replies:
    91
    Views:
    23,860
    DennisRB
    May 31, 2021
  17. Paul S Hamilton

    Hull flexing on 49' Norm Cross Tri

    Paul S Hamilton, May 26, 2021
    Replies:
    4
    Views:
    1,853
    Paul S Hamilton
    May 28, 2021
  18. Stefano Dilena

    Fiberglass hull construction cost

    Stefano Dilena, May 23, 2021 ... 2 3
    Replies:
    39
    Views:
    6,893
    ondarvr
    May 27, 2021
  19. Donnavan Wright

    Aluminium sailing catamaran build

    Donnavan Wright, Sep 9, 2019 ... 2
    Replies:
    26
    Views:
    14,384
    waterbear
    May 27, 2021
  20. Nordschleife

    AC50/F50 Hull Drawings

    Nordschleife, May 25, 2021
    Replies:
    1
    Views:
    2,172
    oldmulti
    May 25, 2021
  21. Doug Lord

    Banque Populaire XI

    Doug Lord, Dec 20, 2019
    Replies:
    6
    Views:
    2,338
    DogCavalry
    May 20, 2021
  22. Cameron Bartlett

    Farrier TrailerTri 720 Centerboard lamination

    Cameron Bartlett, May 16, 2021
    Replies:
    10
    Views:
    2,093
    Russell Brown
    May 17, 2021
  23. SolGato

    SolGato’s Lateen Crab Claw Rig

    SolGato, May 12, 2021 ... 2
    Replies:
    15
    Views:
    3,049
    SolGato
    May 14, 2021
  24. valery gaulin

    Waller Coral Cove 31

    valery gaulin, Apr 23, 2017
    Replies:
    5
    Views:
    3,475
    guzzis3
    May 11, 2021
  25. seandepagnier

    making a daggerboard longer

    seandepagnier, May 7, 2021
    Replies:
    8
    Views:
    1,468
    catsketcher
    May 11, 2021
  26. Doug Lord

    Kite Foiler

    Doug Lord, Apr 22, 2021
    Replies:
    11
    Views:
    1,898
    Skyak
    Apr 26, 2021
  27. Doug Lord

    New Trimaran Foilers

    Doug Lord, Jun 8, 2016 ... 17 18 19
    Replies:
    276
    Views:
    53,132
    Vantage475T
    Apr 26, 2021
  28. Skyak

    Sail GP live on YT

    Skyak, Apr 25, 2021
    Replies:
    1
    Views:
    1,031
    Skyak
    Apr 25, 2021
  29. Charlyipad

    best way to stiffen a bridgedeck?

    Charlyipad, Apr 22, 2021
    Replies:
    11
    Views:
    1,934
    Charlyipad
    Apr 25, 2021
  30. dustman

    How big would a catamaran have to be...?

    dustman, Apr 23, 2021
    Replies:
    12
    Views:
    2,304
    comfisherman
    Apr 25, 2021
  31. Muzammal

    Building 44' wooden tri with traditional planking

    Muzammal, Apr 19, 2021 ... 2
    Replies:
    20
    Views:
    3,719
    Dejay
    Apr 24, 2021
  32. Gary Curtis

    Query carbon rudder box layup and repair

    Gary Curtis, Apr 5, 2021
    Replies:
    2
    Views:
    1,435
    Ganzi
    Apr 24, 2021
  33. Owly

    Design Spiral into Madness

    Owly, Apr 15, 2021 ... 2
    Replies:
    20
    Views:
    2,980
    guzzis3
    Apr 18, 2021
  34. JunkRat

    What’s formula for estimating catamaran speed? Speed from length better than from design?

    JunkRat, Oct 31, 2020
    Replies:
    10
    Views:
    4,431
    Dolfiman
    Apr 18, 2021
  35. JunkRat

    Seeking Tradewind route Statistical Data

    JunkRat, Apr 16, 2021
    Replies:
    7
    Views:
    1,360
    CocoonCruisers
    Apr 17, 2021
  36. Lachie

    Hard v round bilge and leeway

    Lachie, Mar 23, 2021
    Replies:
    9
    Views:
    2,210
    guzzis3
    Apr 14, 2021
  37. David L. Dodd II

    Car Toppable Trimaran Pocket Cruiser

    David L. Dodd II, Mar 15, 2021 ... 2
    Replies:
    21
    Views:
    4,976
    David L. Dodd II
    Apr 6, 2021
  38. peterchech

    CSC 30 Catamaran- the coastal passage

    peterchech, Nov 29, 2011 ... 27 28 29
    Replies:
    425
    Views:
    133,922
    Dorydude
    Apr 6, 2021
  39. SmallSpaceBigImagination

    Building hull in cross sections

    SmallSpaceBigImagination, Mar 22, 2021 ... 2 3 4
    Replies:
    55
    Views:
    7,718
    Mr Efficiency
    Mar 30, 2021
  40. guzzis3

    Seasickness

    guzzis3, Mar 18, 2021
    Replies:
    7
    Views:
    1,534
    Mr Efficiency
    Mar 19, 2021
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