Multihulls

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

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  1. BMP

    L/B ratios the same for short and long hulls?

    BMP, Jun 15, 2022
    Replies:
    13
    Views:
    2,426
    fallguy
    Jun 19, 2022
  2. BMP

    Cat or Tri with Lee Pod

    BMP, Jun 15, 2022
    Replies:
    5
    Views:
    1,753
    BMP
    Jun 15, 2022
  3. member 76956

    Rectangular Tubing for Yacht Design?

    member 76956, May 21, 2022
    Replies:
    12
    Views:
    3,063
    rberrey
    Jun 9, 2022
  4. PerthMini40man

    Foiling radio control trimarans

    PerthMini40man, Jun 9, 2016 ... 11 12 13
    Replies:
    189
    Views:
    37,504
    Flotation
    Jun 7, 2022
  5. lucdekeyser

    60+' custom Harryproa cruiser "Kleen Breeze" first trials

    lucdekeyser, Aug 4, 2017 ... 2
    Replies:
    26
    Views:
    15,838
    fallguy
    May 26, 2022
  6. member 76956

    Sampan Lee Hull?

    member 76956, May 20, 2022
    Replies:
    10
    Views:
    2,827
    AlanX
    May 23, 2022
  7. Owly

    bridge deck streamlining greenhouse effect

    Owly, May 19, 2022
    Replies:
    1
    Views:
    2,139
    BlueBell
    May 20, 2022
  8. member 76956

    Shunting Catamaran?

    member 76956, May 15, 2022
    Replies:
    4
    Views:
    2,681
    member 76956
    May 16, 2022
  9. rturbett

    Okume ply decks- to glass or not to glass

    rturbett, May 13, 2022
    Replies:
    6
    Views:
    2,600
    rturbett
    May 14, 2022
  10. perry2222

    Norewegian Multi hull designers

    perry2222, Mar 20, 2022
    Replies:
    11
    Views:
    4,331
    redreuben
    May 14, 2022
  11. Burnside Style

    Plywood Tornado US21 Hull Repair

    Burnside Style, May 1, 2022
    Replies:
    5
    Views:
    3,028
    Burnside Style
    May 4, 2022
  12. East Coast Sailor

    Easton Catamarans

    East Coast Sailor, May 4, 2022
    Replies:
    0
    Views:
    3,201
    East Coast Sailor
    May 4, 2022
  13. MichaelRoberts

    Laminate or dacron for 60 foot catamaran

    MichaelRoberts, Mar 4, 2022 ... 2
    Replies:
    17
    Views:
    5,816
    Skyak
    Apr 21, 2022
  14. SeaBoat

    Block coefficient of Multihull

    SeaBoat, Apr 11, 2022
    Replies:
    1
    Views:
    3,788
    jehardiman
    Apr 11, 2022
  15. DamianW86

    Building 17' wide 14' long deck

    DamianW86, Jan 7, 2022 ... 2
    Replies:
    17
    Views:
    6,389
    redreuben
    Apr 10, 2022
  16. Jerry_Lincoln

    Norman Cross Trimaran

    Jerry_Lincoln, Mar 26, 2005 ... 6 7 8
    Replies:
    114
    Views:
    111,259
    Briter
    Apr 6, 2022
  17. rael dobkins

    Proa Self Steering? AD-Scull? Sheet to Tiller? Lets see...

    rael dobkins, Apr 2, 2022
    Replies:
    2
    Views:
    3,727
    rael dobkins
    Apr 4, 2022
  18. oldsailor7

    Hedley Nicol Trimaran Plans

    oldsailor7, Mar 12, 2010 ... 31 32 33
    Replies:
    480
    Views:
    143,153
    cavalier mk2
    Apr 4, 2022
  19. Qmaran

    Is rigidity a religion? Amas on the move....

    Qmaran, Aug 31, 2021 ... 3 4 5
    Replies:
    74
    Views:
    16,126
    gonzo
    Mar 28, 2022
  20. MrMillard

    Amateur trimaran design critique

    MrMillard, Dec 1, 2021 ... 5 6 7
    Replies:
    98
    Views:
    18,685
    Bobuk25
    Mar 23, 2022
  21. revintage

    Trimaran alignment of hulls with different rocker

    revintage, Mar 1, 2022
    Replies:
    10
    Views:
    4,623
    revintage
    Mar 23, 2022
  22. Flotation

    Bieker B53

    Flotation, Dec 22, 2021
    Replies:
    5
    Views:
    5,906
    redreuben
    Mar 15, 2022
  23. zombat

    KLIS trimaran: owners wanted

    zombat, Dec 5, 2019 ... 2 3
    Replies:
    42
    Views:
    14,281
    jamez
    Mar 2, 2022
  24. waterbear

    Jarcat 6 verions, modifications etc.

    waterbear, Jun 28, 2019 ... 2
    Replies:
    26
    Views:
    19,784
    sailhand
    Feb 27, 2022
  25. BobBill

    More Changes to basic (Malibu) Outrigger...

    BobBill, Feb 25, 2022
    Replies:
    3
    Views:
    3,990
    BobBill
    Feb 26, 2022
  26. Boy Griffioen

    D shape or semi oval advances wing systems shape for double mainsail

    Boy Griffioen, Jan 24, 2022 ... 2
    Replies:
    18
    Views:
    6,177
    Erwan
    Feb 25, 2022
  27. revintage

    Single water stay attachment for both beams

    revintage, Feb 22, 2022
    Replies:
    0
    Views:
    3,607
    revintage
    Feb 22, 2022
  28. terryI

    1977 26' simpson-wild trimaran

    terryI, Jan 7, 2008 ... 2 3 4
    Replies:
    46
    Views:
    32,523
    David Walsh
    Feb 22, 2022
  29. Geno41

    Cat Design comparo question

    Geno41, Jul 28, 2017 ... 2
    Replies:
    25
    Views:
    11,197
    supervisit
    Feb 21, 2022
  30. Scuff

    Kickup rudder critique

    Scuff, Nov 8, 2021 ... 2 3
    Replies:
    31
    Views:
    9,714
    freddyj
    Feb 14, 2022
  31. perry2222

    Dagger board control lines

    perry2222, Feb 12, 2022
    Replies:
    2
    Views:
    3,997
    perry2222
    Feb 13, 2022
  32. rturbett

    First try at making a Shark mould!

    rturbett, Jan 31, 2022
    Replies:
    3
    Views:
    4,298
    rturbett
    Feb 10, 2022
  33. Philippe Lapere

    Advice on 20ft beachcat design and build

    Philippe Lapere, Apr 29, 2021 ... 2 3 4
    Replies:
    52
    Views:
    19,109
    Windward 54
    Feb 5, 2022
  34. rturbett

    Deconstructive testing!

    rturbett, Jan 31, 2022
    Replies:
    5
    Views:
    4,195
    rturbett
    Feb 1, 2022
  35. Corley

    Lock Crowther 1962 Kraken 25 trimaran build and rebuild log

    Corley, Jun 7, 2011 ... 12 13 14
    Replies:
    203
    Views:
    55,136
    revintage
    Feb 1, 2022
  36. revintage

    Windknife trifoiler build

    revintage, Dec 7, 2018 ... 2 3 4
    Replies:
    48
    Views:
    14,595
    revintage
    Jan 29, 2022
  37. Muzammal

    Lack of data about steel multihulls

    Muzammal, May 18, 2021 ... 2 3 4
    Replies:
    46
    Views:
    15,287
    Sand crab
    Jan 27, 2022
  38. MichaelRoberts

    Epoxy water lock for wet exhaust

    MichaelRoberts, Jan 15, 2022 ... 2 3
    Replies:
    33
    Views:
    8,516
    MichaelRoberts
    Jan 27, 2022
  39. rob denney

    Foiler 50

    rob denney, Jan 21, 2022
    Replies:
    1
    Views:
    4,561
    lucdekeyser
    Jan 25, 2022
  40. Iridian

    Catamaran Transport Methods

    Iridian, Dec 19, 2021 ... 2
    Replies:
    25
    Views:
    7,451
    gonzo
    Jan 22, 2022
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