Multihulls

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

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  1. JCaprani

    Ontong Java II by Hans Klaar

    JCaprani, May 3, 2012 ... 2 3
    Replies:
    40
    Views:
    20,871
    peterAustralia
    Dec 17, 2020
  2. Bigfork

    W17 trimaran...What do ya think??

    Bigfork, Oct 8, 2010 ... 2 3 4
    Replies:
    51
    Views:
    20,863
    W17 designer
    Jan 11, 2015
  3. Doug Lord

    New A Class Catamaran Rig: Square Top Jib

    Doug Lord, Jan 17, 2011 ... 2 3
    Replies:
    36
    Views:
    20,837
    waynemarlow
    Feb 21, 2015
  4. flagg

    Woods Designs - Eclipse, Flica and Vardo build times

    flagg, Dec 5, 2014 ... 2 3
    Replies:
    41
    Views:
    20,771
    Boatguy30
    Mar 6, 2015
  5. redreuben

    Mast building.

    redreuben, Aug 18, 2012 ... 2 3 4
    Replies:
    46
    Views:
    20,691
    frenette
    Dec 27, 2012
  6. themanshed

    New Design TMS-20 Racing Trimaran

    themanshed, Oct 1, 2009 ... 2 3
    Replies:
    34
    Views:
    20,644
    upchurchmr
    Oct 21, 2012
  7. Amy

    Does anyone out there have any experance converting two kayaks into a catamaran?

    Amy, May 1, 2010 ... 2 3
    Replies:
    31
    Views:
    20,590
    Doug Lord
    Sep 26, 2010
  8. Becaris

    22m cruising cat design concept

    Becaris, Aug 3, 2008 ... 6 7 8
    Replies:
    114
    Views:
    20,506
    brian eiland
    Sep 7, 2009
  9. jaydh

    aluminum cat project...

    jaydh, Jun 30, 2009
    Replies:
    13
    Views:
    20,385
    jaydh
    Aug 10, 2009
  10. Gary Habersetzer

    Concept designer wanted

    Gary Habersetzer, Jul 9, 2006 ... 2 3 4
    Replies:
    46
    Views:
    20,383
    yipster
    Apr 10, 2007
  11. Blacky

    comparison of old trimarans?

    Blacky, Nov 19, 2010 ... 2
    Replies:
    17
    Views:
    20,364
    oldsailor7
    Jan 13, 2011
  12. peterchech

    why has high buoyancy become so important?

    peterchech, May 6, 2011 ... 3 4 5
    Replies:
    66
    Views:
    20,333
    Gary Baigent
    May 24, 2011
  13. Dr. Peter

    Narrowing the beam

    Dr. Peter, Apr 1, 2010 ... 3 4 5
    Replies:
    70
    Views:
    20,331
    Dr. Peter
    May 5, 2011
  14. SpiritWolf15x

    Hughes 26?

    SpiritWolf15x, Jun 18, 2010 ... 3 4 5
    Replies:
    61
    Views:
    20,275
    oldsailor7
    Dec 27, 2010
  15. tamas

    Folding system loads

    tamas, Nov 11, 2013 ... 7 8 9
    Replies:
    124
    Views:
    20,244
    ThomD
    Dec 21, 2014
  16. nickvonw

    Amateur wants to build Blue water multi hull cruiser

    nickvonw, Oct 13, 2009 ... 3 4 5
    Replies:
    71
    Views:
    20,218
    Alan M.
    Dec 6, 2009
  17. Snubber

    Hobie Cat

    Snubber, Feb 7, 2006
    Replies:
    9
    Views:
    20,213
    outsidersails
    Oct 22, 2012
  18. Skint For Life

    41 Foot Trailerable Blue Water Cruising Catamaran

    Skint For Life, Apr 27, 2011
    Replies:
    14
    Views:
    20,191
    Alex.A
    Aug 14, 2011
  19. prograd

    folding catamaran systems

    prograd, Oct 14, 2012 ... 2 3
    Replies:
    31
    Views:
    20,180
    spidennis
    Oct 24, 2012
  20. neptunkryssare

    Want to build a small foiling trimaran

    neptunkryssare, Aug 3, 2014 ... 2
    Replies:
    23
    Views:
    20,067
    reidhester
    Dec 22, 2014
  21. basildog

    NZ Trimaran - Demon Tricycle

    basildog, Dec 2, 2008 ... 2 3 4
    Replies:
    52
    Views:
    19,955
    rapscallion
    Jan 9, 2012
  22. PetterM
    Locked

    length/beam ratio of around 20

    PetterM, Apr 21, 2015 ... 5 6 7
    Replies:
    102
    Views:
    19,934
    Boat Design Net Moderator
    Apr 29, 2015
  23. waterbear

    Jarcat 6 verions, modifications etc.

    waterbear, Jun 28, 2019 ... 2
    Replies:
    26
    Views:
    19,795
    sailhand
    Feb 27, 2022
  24. Doug Lord

    Everglades Challenge: the Right Boat?

    Doug Lord, Mar 5, 2016 ... 4 5 6
    Replies:
    85
    Views:
    19,715
    Doug Lord
    Apr 5, 2016
  25. EscapeArtist

    Can solar energy power a catamaran?

    EscapeArtist, Sep 4, 2016 ... 3 4 5
    Replies:
    70
    Views:
    19,711
    pacific green
    Oct 27, 2017
  26. Mulkari

    Fast coastal cruising catamaran

    Mulkari, Aug 13, 2012 ... 2
    Replies:
    26
    Views:
    19,647
    Mulkari
    Aug 24, 2012
  27. DennisRB

    Crowther design 226A (42 foot cruising cat)

    DennisRB, Jan 25, 2014 ... 2 3
    Replies:
    38
    Views:
    19,566
    xrudi
    Aug 8, 2019
  28. Tom Makes Things

    Non-foiling trimarans under 20'

    Tom Makes Things, Sep 25, 2019 ... 4 5 6
    Replies:
    79
    Views:
    19,432
    kleppar
    Jun 10, 2021
  29. rosbullterrier

    Seagull Racing

    rosbullterrier, Jan 1, 2009 ... 2
    Replies:
    29
    Views:
    19,390
    Guest625101138
    Jan 15, 2009
  30. Saylaman

    Maximum trailerable towing width

    Saylaman, Feb 7, 2010 ... 2
    Replies:
    28
    Views:
    19,362
    Wake31
    Mar 3, 2011
  31. Alex.A

    Proa Hulls

    Alex.A, May 21, 2010 ... 4 5 6
    Replies:
    83
    Views:
    19,344
    Alex.A
    Jul 8, 2010
  32. Chris Ostlind
    Locked

    New Take on Tremolino

    Chris Ostlind, Apr 27, 2007 ... 2 3
    Replies:
    34
    Views:
    19,316
    ppl_rjg
    Jan 20, 2010
  33. seadreamer6

    twin masts on cat thoughts on

    seadreamer6, Oct 21, 2012 ... 2
    Replies:
    26
    Views:
    19,296
    brian eiland
    Nov 14, 2023
  34. Philippe Lapere

    Advice on 20ft beachcat design and build

    Philippe Lapere, Apr 29, 2021 ... 2 3 4
    Replies:
    52
    Views:
    19,118
    Windward 54
    Feb 5, 2022
  35. Thomas Rheuble

    Trailerable Trimarans

    Thomas Rheuble, Apr 21, 2003
    Replies:
    10
    Views:
    19,055
    Gunnar Svensson
    Aug 27, 2004
  36. ImaginaryNumber

    Seven Sisters tri, with wave-piercing amas

    ImaginaryNumber, May 31, 2014 ... 2 3
    Replies:
    32
    Views:
    19,040
    qw22
    Dec 14, 2014
  37. guzzis3

    Catamaran plans, who have I forgotten ?

    guzzis3, Apr 4, 2023 ... 12 13 14
    Replies:
    200
    Views:
    18,995
    waikikin
    Nov 29, 2023
  38. guzzis3

    crowther 10 hull refit: how much ?

    guzzis3, Jan 16, 2012 ... 6 7 8
    Replies:
    106
    Views:
    18,932
    guzzis3
    Mar 17, 2012
  39. BillAU

    Brown/Marples Seaclipper 24MC

    BillAU, Jun 22, 2010 ... 2 3 4
    Replies:
    56
    Views:
    18,840
    cavalier mk2
    Jan 14, 2011
  40. cardsinplay

    Carbon3 trimaran from Nigel Irens

    cardsinplay, Nov 22, 2010 ... 2 3
    Replies:
    36
    Views:
    18,764
    oceancruiser
    Jun 5, 2013
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