Hydrodynamics and Aerodynamics

Technical discussion on fluid dynamics: theory and analysis.

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  1. kmcfast

    “End-Plating” the Main and Mizzen

    kmcfast, May 20, 2011
    Replies:
    5
    Views:
    3,553
    philSweet
    May 28, 2011
  2. sun

    “Calculate the wind load in the direction of the incoming wind from 0° to 180° with an angle of 30°

    sun, Nov 3, 2021
    Replies:
    10
    Views:
    2,813
    powerabout
    Jan 26, 2022
  3. aL27jrcf

    [newbie]a rudder of a sailboat having entrance-exit holes?

    aL27jrcf, May 27, 2025
    Replies:
    9
    Views:
    746
    montero
    Jun 1, 2025
  4. anthem

    yet another prismatic coefficient question!

    anthem, Sep 6, 2011
    Replies:
    5
    Views:
    5,764
    philSweet
    Sep 8, 2011
  5. MalSmith

    Yet another analogy for lift

    MalSmith, May 15, 2023
    Replies:
    14
    Views:
    2,461
    DogCavalry
    May 26, 2023
  6. monrosm@shrewsb

    Yacht Aerodynamics

    monrosm@shrewsb, Jan 10, 2011
    Replies:
    7
    Views:
    5,644
    Tim B
    Mar 17, 2011
  7. sigurd

    Xfoil vs javafoil?

    sigurd, Jul 12, 2011
    Replies:
    11
    Views:
    12,832
    sigurd
    Jul 16, 2011
  8. woodbuddha

    XFoil Modelling of Surfboard Fins

    woodbuddha, Jan 20, 2014
    Replies:
    14
    Views:
    7,055
    Leo Lazauskas
    Apr 18, 2014
  9. Dr34m3r

    X-Bow Hull from Ulstein

    Dr34m3r, Mar 2, 2020
    Replies:
    7
    Views:
    6,074
    Ad Hoc
    Jul 25, 2020
  10. Danviletim

    Would full extension swim platform add speed?

    Danviletim, May 18, 2014
    Replies:
    4
    Views:
    6,454
    tom28571
    May 26, 2014
  11. Tyler Flowers

    Would a tunnel cut out work on a Rybo Runner?

    Tyler Flowers, Jul 15, 2017
    Replies:
    1
    Views:
    1,824
    Mr Efficiency
    Jul 15, 2017
  12. Erwan

    WingSail Rake and Gybe Angle Question

    Erwan, Jul 18, 2011
    Replies:
    6
    Views:
    4,135
    Erwan
    Jul 22, 2011
  13. Inquisitor

    Wings on Cruising Catamarans

    Inquisitor, Sep 18, 2020
    Replies:
    5
    Views:
    7,725
    PeteK
    Oct 8, 2020
  14. Rockdamned

    wing software

    Rockdamned, Nov 22, 2011
    Replies:
    6
    Views:
    2,973
    Rockdamned
    Nov 24, 2011
  15. dustman

    Wing sail questions

    dustman, Jan 3, 2023 ... 2
    Replies:
    25
    Views:
    6,141
    dustman
    May 1, 2023
  16. Wally2

    Wing on rudder = longer boat ? Help

    Wally2, Feb 16, 2019
    Replies:
    3
    Views:
    2,759
    messabout
    Feb 16, 2019
  17. Konstanty

    Wing of the "Kasperwing" in sailing?

    Konstanty, May 2, 2016 ... 2
    Replies:
    28
    Views:
    21,682
    Petros
    Nov 3, 2016
  18. MichaelRoberts

    Wing mast section, truncated NACA 63015?

    MichaelRoberts, Sep 6, 2015 ... 2 3
    Replies:
    40
    Views:
    16,170
    brian eiland
    Feb 17, 2016
  19. Roelina

    Wing jib or sail jib?

    Roelina, Dec 5, 2016
    Replies:
    2
    Views:
    3,802
    tspeer
    Dec 9, 2016
  20. BobBill

    Wing Foils Below Waterline

    BobBill, Apr 22, 2012 ... 2
    Replies:
    21
    Views:
    7,113
    BobBill
    May 18, 2012
  21. schakel

    Wing design for the new AC 75 monofoiler

    schakel, Nov 24, 2017
    Replies:
    3
    Views:
    3,510
    Erwan
    Nov 25, 2017
  22. BobBill

    Wing (foil) Length v Width

    BobBill, May 13, 2012
    Replies:
    6
    Views:
    2,569
    BobBill
    May 14, 2012
  23. BobBill

    Wing "Sail/Foil" Question

    BobBill, May 21, 2012
    Replies:
    5
    Views:
    3,575
    tspeer
    May 24, 2012
  24. matt_bob

    Windsurfing Sail and mast design

    matt_bob, Apr 13, 2015 ... 2 3
    Replies:
    34
    Views:
    11,205
    Erwan
    May 12, 2015
  25. Grunf

    Windsurf raked sail

    Grunf, Nov 22, 2020 ... 2 3
    Replies:
    31
    Views:
    8,276
    Steve Clark
    Dec 30, 2020
  26. Howlandwoodworks

    Wind Tunnel testing for hull and rudder

    Howlandwoodworks, Jan 11, 2020
    Replies:
    9
    Views:
    4,000
    Yellowjacket
    Jan 12, 2020
  27. rsskarthikeyan

    Wind tunnel results of Low Reynolds number airfoils

    rsskarthikeyan, Mar 29, 2016
    Replies:
    2
    Views:
    3,671
    rsskarthikeyan
    Mar 30, 2016
  28. farjoe

    Wind Shadow of AC36 Boats

    farjoe, Mar 13, 2021
    Replies:
    12
    Views:
    3,520
    Mikko Brummer
    Apr 22, 2021
  29. kalvens

    wind pressure calculate

    kalvens, Jun 4, 2013
    Replies:
    9
    Views:
    7,433
    kalvens
    Jun 4, 2013
  30. Grunf

    Wind gradient - twist on windsurfing sail

    Grunf, Mar 8, 2020
    Replies:
    12
    Views:
    5,253
    Erwan
    Mar 12, 2020
  31. VaurienH

    wiglet wingsail

    VaurienH, Oct 10, 2012
    Replies:
    5
    Views:
    2,709
    tspeer
    Oct 10, 2012
  32. sigurd

    WIG spit chord question

    sigurd, Jul 8, 2011
    Replies:
    5
    Views:
    3,226
    Michael Y
    Aug 30, 2011
  33. Squidly-Diddly

    why can't they dredge dams with suction tubes?

    Squidly-Diddly, May 3, 2014 ... 2
    Replies:
    15
    Views:
    5,589
    tom28571
    May 11, 2014
  34. ziper1221

    Why are longer diving fins more efficient?

    ziper1221, Jun 24, 2021
    Replies:
    14
    Views:
    5,912
    gonzo
    Aug 30, 2021
  35. jon haig

    which will be faster,a catamaran,or 43' IOR racer,or 50' IOR racer

    jon haig, Aug 19, 2019 ... 2
    Replies:
    20
    Views:
    5,004
    jon haig
    Sep 11, 2019
  36. cmckesson

    Which towing tank do you use?

    cmckesson, Dec 1, 2014
    Replies:
    0
    Views:
    2,103
    cmckesson
    Dec 1, 2014
  37. jmf11

    Which method/tool to compare two very different wingfoil boards?

    jmf11, Aug 26, 2024
    Replies:
    11
    Views:
    3,219
    CT249
    Sep 16, 2024
  38. heavyweather

    Which foil for very low speed

    heavyweather, Jun 12, 2017
    Replies:
    7
    Views:
    11,800
    tspeer
    Feb 22, 2019
  39. Remmlinger

    Where to publish

    Remmlinger, Mar 7, 2014
    Replies:
    4
    Views:
    4,039
    Leo Lazauskas
    Mar 17, 2014
  40. fcfc

    Where to get papers ?

    fcfc, Nov 6, 2012
    Replies:
    3
    Views:
    2,721
    philSweet
    Nov 6, 2012
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