Multihulls

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

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  1. Freelance 85

    50' Norman Cross, sails?

    Freelance 85, Nov 11, 2019
    Replies:
    1
    Views:
    774
    cavalier mk2
    Nov 14, 2019
  2. isvara

    a radical form of propulsion

    isvara, Nov 25, 2019 ... 2
    Replies:
    29
    Views:
    2,489
    cavalier mk2
    Jan 17, 2020
  3. Skullduggerydave

    Kangaroo Island 26 foot trimaran identification

    Skullduggerydave, Nov 26, 2019
    Replies:
    11
    Views:
    1,310
    Skullduggerydave
    Dec 5, 2019
  4. barrymac

    carbon spar cross beam augmentation

    barrymac, Nov 28, 2019
    Replies:
    13
    Views:
    1,173
    barrymac
    Dec 4, 2019
  5. revintage

    Has anyone seen this foiling cat before?

    revintage, Nov 30, 2019
    Replies:
    3
    Views:
    988
    revintage
    Dec 3, 2019
  6. gmoulder

    Foam catamaran kayak

    gmoulder, Dec 2, 2019
    Replies:
    12
    Views:
    1,806
    clmanges
    Jan 6, 2020
  7. zombat

    KLIS trimaran: owners wanted

    zombat, Dec 5, 2019 ... 2 3
    Replies:
    39
    Views:
    4,996
    zombat
    Sep 24, 2020
  8. ProBoat

    Two current articles about catamarans in Professional BoatBuilder magazine

    ProBoat, Dec 9, 2019
    Replies:
    0
    Views:
    1,011
    ProBoat
    Dec 9, 2019
  9. Iain Gordon

    What make/type is this catamaran

    Iain Gordon, Dec 18, 2019
    Replies:
    2
    Views:
    919
    Iain Gordon
    Dec 18, 2019
  10. Doug Lord

    Banque Populaire XI

    Doug Lord, Dec 20, 2019
    Replies:
    6
    Views:
    1,178
    DogCavalry
    May 20, 2021
  11. FantasyTrimaran

    A few trimaran design questions

    FantasyTrimaran, Dec 20, 2019
    Replies:
    8
    Views:
    1,952
    W17 designer
    Dec 14, 2020
  12. Burger

    Easy Catamarans: Snells retired?

    Burger, Dec 21, 2019
    Replies:
    4
    Views:
    3,216
    Burger
    Feb 6, 2020
  13. Time2Tri

    Outboard Motor mounts other than transom

    Time2Tri, Jan 2, 2020
    Replies:
    13
    Views:
    1,454
    Time2Tri
    Jan 7, 2020
  14. Nordschleife

    Foiling Cat Project

    Nordschleife, Jan 3, 2020
    Replies:
    2
    Views:
    826
    Nordschleife
    Jan 3, 2020
  15. Nordschleife

    A-Class Catamaran Plans?

    Nordschleife, Jan 5, 2020 ... 2
    Replies:
    19
    Views:
    2,956
    Manfred.pech
    May 18, 2020
  16. SV Pororoca

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

    SV Pororoca, Jan 8, 2020 ... 2
    Replies:
    16
    Views:
    2,762
    gonzo
    Dec 6, 2020
  17. useragentseven

    Experimental Catamaran Hull Rocker

    useragentseven, Jan 27, 2020
    Replies:
    8
    Views:
    1,477
    useragentseven
    Feb 1, 2020
  18. Onefish

    Aluminum tube sectioned mast

    Onefish, Jan 29, 2020 ... 2
    Replies:
    22
    Views:
    1,522
    Onefish
    Jan 31, 2020
  19. rael dobkins

    Proa Design, Why Make a Model? HAVAYA 30

    rael dobkins, Feb 2, 2020
    Replies:
    0
    Views:
    879
    rael dobkins
    Feb 2, 2020
  20. Bruce Woods

    Rob Dennys' unstayed masts

    Bruce Woods, Feb 4, 2020 ... 2
    Replies:
    15
    Views:
    2,342
    rob denney
    Apr 23, 2020
  21. revintage

    Early UK foiling cats and tris, Mayfly and Force8

    revintage, Feb 6, 2020
    Replies:
    3
    Views:
    910
    Richard Woods
    Feb 8, 2020
  22. brendan gardam

    reduce catamaran beam

    brendan gardam, Feb 11, 2020 ... 2 3
    Replies:
    32
    Views:
    3,318
    Mr Efficiency
    Sep 6, 2020
  23. Owly

    Hobie Hulls (buyer's remorse)

    Owly, Feb 22, 2020 ... 2 3 4
    Replies:
    49
    Views:
    4,360
    Owly
    Mar 27, 2020
  24. rob denney

    Replacing outboard motors with sail in the Marshall islands

    rob denney, Feb 22, 2020 ... 2
    Replies:
    18
    Views:
    1,804
    rob denney
    Mar 31, 2020
  25. Bigfork

    What to do with my parts

    Bigfork, Feb 26, 2020
    Replies:
    9
    Views:
    969
    BlueBell
    Apr 26, 2020
  26. shrijeet mishra

    generating catamaran model from a given offset of single hull

    shrijeet mishra, Feb 27, 2020
    Replies:
    8
    Views:
    1,149
    shrijeet mishra
    Mar 31, 2020
  27. BobBill

    Shear-web ?

    BobBill, Feb 28, 2020 ... 2 3
    Replies:
    34
    Views:
    1,755
    BobBill
    Nov 30, 2020
  28. brendan gardam

    gunter rig on a 23 ft cat

    brendan gardam, Mar 2, 2020
    Replies:
    5
    Views:
    789
    Rumars
    Mar 4, 2020
  29. Markusik

    Leeboards on coastal cruising sail cat?

    Markusik, Mar 12, 2020
    Replies:
    9
    Views:
    1,308
    Markusik
    Apr 9, 2020
  30. brendan gardam

    square top sail

    brendan gardam, Mar 16, 2020
    Replies:
    12
    Views:
    894
    brendan gardam
    Mar 22, 2020
  31. Manfred.pech

    Everglades Challenge 2020

    Manfred.pech, Mar 18, 2020
    Replies:
    4
    Views:
    1,474
    Manfred.pech
    Mar 28, 2020
  32. Squidly-Diddly

    how come no multihull toy RC sail boats?

    Squidly-Diddly, Mar 22, 2020 ... 2
    Replies:
    21
    Views:
    1,801
    rturbett
    May 11, 2020
  33. revintage

    Waterstays on rearbeam

    revintage, Mar 24, 2020
    Replies:
    0
    Views:
    477
    revintage
    Mar 24, 2020
  34. Gary Baigent

    Law abiding Kiwis.

    Gary Baigent, Mar 31, 2020 ... 2 3 4
    Replies:
    56
    Views:
    5,577
    fallguy
    Dec 17, 2020
  35. prabs

    25 foot Live aboard Trimaran

    prabs, Mar 31, 2020
    Replies:
    9
    Views:
    1,902
    guzzis3
    Apr 4, 2020
  36. Jeff96

    Dart 18 for Everglades Challenge

    Jeff96, Apr 6, 2020
    Replies:
    3
    Views:
    627
    Jeff96
    Apr 6, 2020
  37. BlockHead

    Why Is 'My Hull' So Heavy?

    BlockHead, Apr 7, 2020
    Replies:
    13
    Views:
    1,138
    BlockHead
    Apr 11, 2020
  38. Snowbank

    Outboard Catamaran Design

    Snowbank, Apr 11, 2020
    Replies:
    6
    Views:
    1,206
    Mr Efficiency
    Apr 11, 2020
  39. MCourtney

    Bow and stern extensions on a 16m Catamaran

    MCourtney, Apr 20, 2020
    Replies:
    6
    Views:
    1,148
    MCourtney
    Apr 21, 2020
  40. nwguy

    Self tacking jib system question

    nwguy, Apr 24, 2020
    Replies:
    14
    Views:
    1,287
    revintage
    Apr 27, 2020
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