Multihulls

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

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  1. 07MAM

    Trimaran Gross Tonnage and Net Tonnage Formula

    07MAM, Nov 9, 2017
    Replies:
    2
    Views:
    1,019
    07MAM
    Aug 7, 2018
  2. Markusik

    More than two outboards for sailing catamaran?

    Markusik, Mar 1, 2018 ... 2
    Replies:
    18
    Views:
    2,030
    alanrockwood
    Aug 5, 2018
  3. Paul D

    Proa sailing for beginners?

    Paul D, Aug 1, 2018
    Replies:
    10
    Views:
    1,181
    Paul D
    Aug 3, 2018
  4. Doug Lord

    Grainger R42 Trimaran

    Doug Lord, Oct 11, 2017
    Replies:
    4
    Views:
    2,626
    Corley
    Aug 1, 2018
  5. Doug Lord

    F50 Foiling Cat----AC 50 reborn?

    Doug Lord, Jul 31, 2018
    Replies:
    0
    Views:
    905
    Doug Lord
    Jul 31, 2018
  6. Doug Lord

    Francois Gabart Experiments with Electronics

    Doug Lord, Jul 30, 2018
    Replies:
    0
    Views:
    383
    Doug Lord
    Jul 30, 2018
  7. markstrimaran

    38 foot trimaran Id

    markstrimaran, Jul 27, 2018
    Replies:
    3
    Views:
    828
    bruceb
    Jul 29, 2018
  8. Skeezix

    Skip Johnson 42 tri performance?

    Skeezix, Mar 31, 2018
    Replies:
    9
    Views:
    1,435
    Howaya
    Jul 18, 2018
  9. Njord

    Open Source Modular boat system

    Njord, Jul 17, 2018
    Replies:
    2
    Views:
    948
    Dolfiman
    Jul 18, 2018
  10. Caldera Boats

    Hobie Bravo

    Caldera Boats, Jun 1, 2006 ... 2
    Replies:
    20
    Views:
    41,640
    CT249
    Jul 17, 2018
  11. peterbike

    Crowther X10

    peterbike, May 23, 2018 ... 2
    Replies:
    25
    Views:
    2,453
    Jethrow
    Jul 15, 2018
  12. onekiwi

    Crowther 33 anyone?

    onekiwi, Mar 23, 2018
    Replies:
    3
    Views:
    1,239
    bruceb
    Jul 10, 2018
  13. eiasu

    Trimaran with accomodation in the amas

    eiasu, Nov 23, 2012 ... 15 16 17
    Replies:
    244
    Views:
    43,866
    cavalier mk2
    Jul 10, 2018
  14. CasparvdBroek

    Great Barrier Express (GBE) 8.5m catamaran CAD wanted.

    CasparvdBroek, Jul 8, 2018
    Replies:
    0
    Views:
    678
    CasparvdBroek
    Jul 8, 2018
  15. Corley

    2018 R2AK underway

    Corley, Jun 14, 2018 ... 2
    Replies:
    15
    Views:
    1,328
    Corley
    Jun 26, 2018
  16. Angélique

    Abandoned Cross 38 restoration project in the Netherlands - for sale - or to give away ?

    Angélique, Jun 14, 2018
    Replies:
    3
    Views:
    1,232
    Angélique
    Jun 19, 2018
  17. Doug Lord

    Round Texcel 2018

    Doug Lord, Jun 15, 2018
    Replies:
    2
    Views:
    534
    Doug Lord
    Jun 18, 2018
  18. dsigned

    Catamaran tunnel design

    dsigned, Aug 28, 2017
    Replies:
    3
    Views:
    1,653
    David J Ritchie
    Jun 16, 2018
  19. dsigned

    scow bow trimaran

    dsigned, Apr 27, 2018 ... 2 3
    Replies:
    30
    Views:
    3,032
    Dolfiman
    Jun 15, 2018
  20. rael dobkins

    Breaking the rules, Balkan Shipyards.

    rael dobkins, Jun 12, 2018
    Replies:
    8
    Views:
    811
    rael dobkins
    Jun 13, 2018
  21. teamcallander

    Power trimaran world cruiser

    teamcallander, May 13, 2017
    Replies:
    5
    Views:
    3,424
    AquaDive
    Jun 13, 2018
  22. JCaprani

    Ontong Java II by Hans Klaar

    JCaprani, May 3, 2012 ... 2 3
    Replies:
    39
    Views:
    13,352
    Angélique
    Jun 11, 2018
  23. peterbike

    Proa thread

    peterbike, May 30, 2018
    Replies:
    3
    Views:
    973
    rwatson
    Jun 7, 2018
  24. peterbike

    Some interesting viewing - if you haven't already seen it ?

    peterbike, Jun 7, 2018
    Replies:
    0
    Views:
    645
    peterbike
    Jun 7, 2018
  25. Doug Lord

    A Cat on fire!(going very fast) / M2 on foils

    Doug Lord, Jun 1, 2018
    Replies:
    3
    Views:
    942
    Doug Halsey
    Jun 7, 2018
  26. peterbike

    Cat ketch trimaran

    peterbike, May 23, 2018
    Replies:
    12
    Views:
    2,341
    Gary Baigent
    Jun 3, 2018
  27. goodwilltoall

    LVL Crossbeams

    goodwilltoall, May 20, 2018 ... 2 3
    Replies:
    40
    Views:
    2,064
    redreuben
    Jun 1, 2018
  28. Moewaka

    Cruising cat design

    Moewaka, Jun 25, 2016 ... 3 4 5
    Replies:
    61
    Views:
    11,322
    Niclas Vestman
    May 31, 2018
  29. magentawave

    Anyone installed an outboard motor sled to a Searunner 34?

    magentawave, May 24, 2018
    Replies:
    1
    Views:
    607
    PAR
    May 24, 2018
  30. RHP

    Jim Brown Searunner 42

    RHP, May 23, 2018
    Replies:
    9
    Views:
    986
    magentawave
    May 24, 2018
  31. Bigfork

    Scored a Donor Cat, What is it?

    Bigfork, May 21, 2018
    Replies:
    8
    Views:
    846
    Ike
    May 23, 2018
  32. jdory

    Need help with headsail, genoa track and cars

    jdory, May 22, 2018
    Replies:
    5
    Views:
    616
    JosephT
    May 22, 2018
  33. Doug Lord

    Foiling Windsurfer vs Foiling Cat

    Doug Lord, May 22, 2018
    Replies:
    0
    Views:
    565
    Doug Lord
    May 22, 2018
  34. Doug Lord

    Uptip Foils

    Doug Lord, Oct 24, 2016 ... 2
    Replies:
    26
    Views:
    4,607
    Doug Lord
    May 21, 2018
  35. BobBill

    Foils (Bruce?) Question

    BobBill, Feb 1, 2012 ... 2
    Replies:
    28
    Views:
    4,332
    Doug Lord
    May 21, 2018
  36. Trailtoy1993

    Fast Cat for cargo carrying and research input needed

    Trailtoy1993, May 10, 2018 ... 2
    Replies:
    18
    Views:
    1,531
    rwatson
    May 15, 2018
  37. riskmore

    Foil assist cruising cat possible?

    riskmore, May 12, 2018
    Replies:
    10
    Views:
    1,693
    Ad Hoc
    May 14, 2018
  38. mrybas

    Cracks in window frame. How to fix?

    mrybas, Mar 4, 2018 ... 2
    Replies:
    22
    Views:
    1,344
    mrybas
    May 14, 2018
  39. kelldog

    Brine Shrimp Catamaran

    kelldog, Aug 8, 2017 ... 2
    Replies:
    25
    Views:
    3,446
    kelldog
    May 13, 2018
  40. Doug Lord

    Vampire Cat with Canted T-foils

    Doug Lord, Sep 4, 2014 ... 2
    Replies:
    27
    Views:
    6,611
    bjn
    May 1, 2018
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