Multihulls

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

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  1. Dolfiman

    Ultims 2018-2019

    Dolfiman, Mar 29, 2018 ... 2 3 4
    Replies:
    52
    Views:
    4,866
    Doug Lord
    Oct 27, 2018
  2. Corley

    Article on Phillipine Banca hull forms

    Corley, Mar 28, 2018
    Replies:
    0
    Views:
    876
    Corley
    Mar 28, 2018
  3. Doug Lord

    Hollow Sections aft on ULTIME Trimaran Amas

    Doug Lord, Mar 28, 2018 ... 2 3
    Replies:
    34
    Views:
    4,884
    Doug Lord
    May 6, 2019
  4. ABD

    composite bowsprit

    ABD, Mar 26, 2018
    Replies:
    0
    Views:
    770
    ABD
    Mar 26, 2018
  5. markstrimaran

    Trailerable trimaran, rebuilt tandem axle

    markstrimaran, Mar 25, 2018
    Replies:
    4
    Views:
    1,216
    markstrimaran
    Mar 26, 2018
  6. Doug Lord

    IDEC Sport Refit Complete

    Doug Lord, Mar 24, 2018
    Replies:
    6
    Views:
    1,290
    Doug Lord
    Nov 8, 2018
  7. onekiwi

    Crowther 33 anyone?

    onekiwi, Mar 23, 2018
    Replies:
    3
    Views:
    1,731
    bruceb
    Jul 10, 2018
  8. Clyde Burks

    Proa "mast"??

    Clyde Burks, Mar 22, 2018
    Replies:
    1
    Views:
    924
    JosephT
    Mar 22, 2018
  9. John Coulson

    Aluminium Cat designs

    John Coulson, Mar 14, 2018
    Replies:
    7
    Views:
    1,968
    hump101
    Mar 14, 2018
  10. aussiebushman

    Amended single rudder for small sailing cat

    aussiebushman, Mar 13, 2018
    Replies:
    7
    Views:
    1,390
    aussiebushman
    Mar 21, 2018
  11. John Coulson

    considering building Kurt Hughes

    John Coulson, Mar 12, 2018 ... 2 3
    Replies:
    31
    Views:
    8,527
    Corley
    Apr 26, 2018
  12. Richard Hasse

    Catamaran Rowboat

    Richard Hasse, Mar 9, 2018
    Replies:
    8
    Views:
    1,913
    Nautically Obsessed
    Mar 14, 2018
  13. Greg B

    Ngalawa/Dhow Mods

    Greg B, Mar 9, 2018
    Replies:
    0
    Views:
    905
    Greg B
    Mar 9, 2018
  14. Nautically Obsessed

    Please Sanity Check My Catamaran Design

    Nautically Obsessed, Mar 4, 2018 ... 3 4 5
    Replies:
    73
    Views:
    8,366
    gonzo
    Dec 6, 2018
  15. mrybas

    Cracks in window frame. How to fix?

    mrybas, Mar 4, 2018 ... 2
    Replies:
    22
    Views:
    1,903
    mrybas
    May 14, 2018
  16. Manfred.pech

    Everglades Challenge 2018

    Manfred.pech, Mar 3, 2018
    Replies:
    7
    Views:
    2,299
    Manfred.pech
    Mar 9, 2018
  17. Markusik

    More than two outboards for sailing catamaran?

    Markusik, Mar 1, 2018 ... 2
    Replies:
    18
    Views:
    2,946
    alanrockwood
    Aug 5, 2018
  18. bjn

    Self righting multihull?

    bjn, Feb 27, 2018 ... 2 3
    Replies:
    30
    Views:
    5,353
    rob denney
    Mar 1, 2018
  19. Howaya

    Tony Smith, Guest Speaker March 4

    Howaya, Feb 26, 2018
    Replies:
    0
    Views:
    798
    Howaya
    Feb 26, 2018
  20. jorgepease

    Questions Wishbone - Birig, Rotating, Unstayed Wing Masts - Catamaran

    jorgepease, Feb 23, 2018 ... 2 3
    Replies:
    31
    Views:
    7,277
    Angélique
    Feb 27, 2018
  21. Doug Lord

    Bieker Designed Fujin Capsizes

    Doug Lord, Feb 20, 2018
    Replies:
    0
    Views:
    1,289
    Doug Lord
    Feb 20, 2018
  22. Doug Lord

    Mothquito with "Increased Foiling System"

    Doug Lord, Feb 19, 2018 ... 2
    Replies:
    20
    Views:
    3,371
    Doug Lord
    Jul 7, 2020
  23. Patrick345

    Engineer with No Boat Design Experience

    Patrick345, Feb 18, 2018
    Replies:
    7
    Views:
    1,137
    Patrick345
    Feb 19, 2018
  24. Doug Lord

    Ultim Class 32/23

    Doug Lord, Feb 18, 2018
    Replies:
    0
    Views:
    1,056
    Doug Lord
    Feb 18, 2018
  25. ABD

    catamaran added wave resistance

    ABD, Feb 18, 2018
    Replies:
    8
    Views:
    1,465
    Richard Woods
    Feb 20, 2018
  26. Bala5278

    Frictional & Wave making Resistance

    Bala5278, Feb 16, 2018
    Replies:
    11
    Views:
    1,689
    TANSL
    Feb 22, 2018
  27. Manfred.pech

    New 2018

    Manfred.pech, Feb 10, 2018
    Replies:
    2
    Views:
    955
    Javiar
    Feb 14, 2018
  28. revintage

    Lengthen beachcat beams.

    revintage, Feb 7, 2018
    Replies:
    2
    Views:
    968
    revintage
    Feb 12, 2018
  29. okeydokey

    Hobie 14' & some stupid kid

    okeydokey, Feb 4, 2018
    Replies:
    5
    Views:
    1,112
    upchurchmr
    Feb 4, 2018
  30. UpOnStands

    How to calc the L/W ratio for hulls with LAR keels?

    UpOnStands, Feb 1, 2018
    Replies:
    7
    Views:
    1,069
    UpOnStands
    Feb 3, 2018
  31. CardboardKing

    Lateen Rig on Hobie Cat?

    CardboardKing, Jan 30, 2018 ... 2 3
    Replies:
    33
    Views:
    4,255
    markstrimaran
    Mar 28, 2018
  32. Doug Lord

    Super Foiler Grand Prix 2018-starts February

    Doug Lord, Jan 19, 2018 ... 2
    Replies:
    28
    Views:
    2,701
    Doug Lord
    Apr 8, 2018
  33. Doug Lord

    Spindrift Dismasted

    Doug Lord, Jan 16, 2018
    Replies:
    1
    Views:
    880
    JosephT
    Jan 16, 2018
  34. massandspace

    Is boom vang needed on cat with long rear traveler track?

    massandspace, Jan 15, 2018
    Replies:
    9
    Views:
    1,937
    gonzo
    Apr 30, 2018
  35. GrahamR

    C foils

    GrahamR, Jan 14, 2018 ... 2
    Replies:
    29
    Views:
    4,435
    GrahamR
    Mar 22, 2018
  36. TwoBirds

    Dipping lug on a proa?

    TwoBirds, Jan 13, 2018
    Replies:
    12
    Views:
    2,148
    Richard Woods
    Feb 9, 2019
  37. andysailor

    Shorten mainsail track?

    andysailor, Jan 10, 2018
    Replies:
    4
    Views:
    828
    hump101
    Jan 11, 2018
  38. guzzis3

    Self tacking main sails

    guzzis3, Dec 30, 2017
    Replies:
    9
    Views:
    2,360
    Richard Woods
    Jan 2, 2018
  39. UpOnStands

    Outremer with foil assist?

    UpOnStands, Dec 28, 2017
    Replies:
    4
    Views:
    1,842
    UpOnStands
    Jan 3, 2018
  40. valery gaulin

    Cheers Proa scaled down

    valery gaulin, Dec 28, 2017
    Replies:
    14
    Views:
    2,259
    BlueBell
    Feb 15, 2018
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