Hydrodynamics and Aerodynamics

Technical discussion on fluid dynamics: theory and analysis.

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  1. farjoe

    Wind Shadow of AC36 Boats

    farjoe, Mar 13, 2021
    Replies:
    12
    Views:
    2,575
    Mikko Brummer
    Apr 22, 2021
  2. Eytan Levi

    L= 4.06 X V^2 X S X CL Hydrofoil

    Eytan Levi, Feb 18, 2021
    Replies:
    0
    Views:
    1,719
    Eytan Levi
    Feb 18, 2021
  3. Remmlinger

    Aerodynamic Characteristics of 2D Sail sections

    Remmlinger, Feb 16, 2021 ... 2
    Replies:
    15
    Views:
    2,848
    gonzo
    Mar 4, 2021
  4. Glueandcoffee

    Rc sailrocket

    Glueandcoffee, Feb 9, 2021 ... 2 3 4
    Replies:
    51
    Views:
    6,488
    Glueandcoffee
    Mar 28, 2021
  5. mfly

    Developed New Type of Soft Wing Sail: Wing'soul

    mfly, Feb 9, 2021
    Replies:
    2
    Views:
    2,093
    ImaginaryNumber
    Feb 13, 2021
  6. Sailor Al

    A sail is not a wing

    Sailor Al, Feb 7, 2021 ... 11 12 13
    Replies:
    183
    Views:
    14,263
    Howlandwoodworks
    Feb 26, 2021
  7. RogerO

    Fenced V foil sail inflatable planB

    RogerO, Feb 2, 2021
    Replies:
    2
    Views:
    1,357
    RogerO
    Feb 9, 2021
  8. Christian Lucas

    comparison foil vis surface gliding ski at best angle of attack

    Christian Lucas, Jan 30, 2021
    Replies:
    1
    Views:
    1,257
    Erwan
    Jan 30, 2021
  9. RogerO

    Fenced surface piercing V foil sail inflatable.

    RogerO, Jan 27, 2021 ... 2
    Replies:
    18
    Views:
    2,631
    RogerO
    Feb 15, 2021
  10. 14berlin

    Basic Foil Design (I14 T-Foil)

    14berlin, Jan 23, 2021
    Replies:
    4
    Views:
    3,496
    14berlin
    Jan 28, 2021
  11. S V

    Slender non-planing foil assist catamaran?

    S V, Dec 28, 2020 ... 5 6 7
    Replies:
    95
    Views:
    9,276
    S V
    Jan 7, 2021
  12. stepcut

    Asymmetric Leeboard Design?

    stepcut, Dec 23, 2020
    Replies:
    14
    Views:
    3,645
    tspeer
    Jan 22, 2021
  13. MoeZ

    Designing Planing Hulls...

    MoeZ, Dec 15, 2020
    Replies:
    0
    Views:
    1,647
    MoeZ
    Dec 15, 2020
  14. 23feet

    When does the low aspect foil shine?

    23feet, Dec 3, 2020
    Replies:
    13
    Views:
    3,121
    Eric ruttan
    Dec 23, 2020
  15. revintage

    Keiper's Williwaw bow foils

    revintage, Dec 2, 2020
    Replies:
    9
    Views:
    2,147
    revintage
    Jan 25, 2021
  16. dustman

    Higher Cp at higher speeds equates to less resistance?

    dustman, Dec 1, 2020 ... 4 5 6
    Replies:
    78
    Views:
    7,617
    Eric ruttan
    Dec 22, 2020
  17. dustman

    Wave interference in catamarans

    dustman, Dec 1, 2020
    Replies:
    10
    Views:
    3,014
    Mr Efficiency
    Jan 26, 2021
  18. Bornyesterday

    Never Seen This Before

    Bornyesterday, Nov 27, 2020
    Replies:
    9
    Views:
    1,859
    Bornyesterday
    Dec 8, 2020
  19. Dave_S

    Help with design of T rudders for a 50' catamaran

    Dave_S, Nov 24, 2020
    Replies:
    4
    Views:
    1,590
    Dave_S
    Jan 2, 2021
  20. Grunf

    Windsurf raked sail

    Grunf, Nov 22, 2020 ... 2 3
    Replies:
    31
    Views:
    5,849
    Steve Clark
    Dec 30, 2020
  21. Surfer Naval Architect

    Proper regression to calculate the power prediction for a Catamaran

    Surfer Naval Architect, Nov 19, 2020
    Replies:
    1
    Views:
    1,154
    Alik
    Nov 19, 2020
  22. Surfer Naval Architect

    Stream lines of a container ship

    Surfer Naval Architect, Nov 19, 2020
    Replies:
    4
    Views:
    1,573
    Mr Efficiency
    Nov 21, 2020
  23. TyphoonUGent

    Typhoon a new and free program for foils

    TyphoonUGent, Nov 17, 2020
    Replies:
    7
    Views:
    4,957
    S V
    Sep 26, 2022
  24. Surfer Naval Architect

    Additional resistance due to wave of 1.2 m height for a boat with a Froude 0.6

    Surfer Naval Architect, Nov 11, 2020
    Replies:
    4
    Views:
    1,599
    rxcomposite
    Nov 12, 2020
  25. Pierre Talbot

    Translate Newton to kwh

    Pierre Talbot, Nov 9, 2020
    Replies:
    3
    Views:
    1,113
    fredrosse
    Nov 12, 2020
  26. Dave_S

    Foils...Long cord length V's wide wingspan ?

    Dave_S, Oct 26, 2020
    Replies:
    3
    Views:
    1,938
    CocoonCruisers
    Nov 9, 2020
  27. Dave_S

    T Rudder designs for cruising catamarans

    Dave_S, Oct 19, 2020
    Replies:
    7
    Views:
    2,202
    patzefran
    Oct 21, 2020
  28. 23feet

    Waterline length includes the rudder? Displacement speed.

    23feet, Oct 19, 2020
    Replies:
    3
    Views:
    2,506
    fredrosse
    Feb 4, 2021
  29. Mitch1990

    Manoeuvring Assessment

    Mitch1990, Oct 12, 2020
    Replies:
    0
    Views:
    807
    Mitch1990
    Oct 12, 2020
  30. Chaos

    trailing edge

    Chaos, Sep 27, 2020 ... 2
    Replies:
    17
    Views:
    3,396
    Chaos
    Oct 15, 2020
  31. Inquisitor

    Hopped-Up Winnebago

    Inquisitor, Sep 21, 2020
    Replies:
    11
    Views:
    2,097
    Inquisitor
    Oct 18, 2020
  32. Inquisitor

    Wings on Cruising Catamarans

    Inquisitor, Sep 18, 2020
    Replies:
    5
    Views:
    5,521
    PeteK
    Oct 8, 2020
  33. Ribber

    On a planning V-Bottom powerboat are chines below the waterline actually useful?

    Ribber, Sep 16, 2020 ... 2
    Replies:
    15
    Views:
    3,715
    Mr Efficiency
    Sep 17, 2020
  34. Inquisitor

    Drag Coefficient versus Size

    Inquisitor, Sep 15, 2020 ... 2
    Replies:
    17
    Views:
    3,602
    Will Gilmore
    Apr 20, 2021
  35. ARQNAV

    POWERSEA still working?

    ARQNAV, Sep 14, 2020
    Replies:
    2
    Views:
    1,328
    ARQNAV
    Sep 14, 2020
  36. dustman

    Gap between luff and mast, effect on efficiency?

    dustman, Aug 29, 2020
    Replies:
    6
    Views:
    2,109
    dustman
    Sep 1, 2020
  37. Greg Woulfe

    Shark Cat - Removing the wave-breaker? To do or not to do?

    Greg Woulfe, Aug 3, 2020
    Replies:
    7
    Views:
    3,476
    Greg Woulfe
    Aug 3, 2020
  38. Chaos

    Keel trailing edge Hunter 26.5

    Chaos, Jul 23, 2020
    Replies:
    4
    Views:
    2,062
    Chaos
    Nov 19, 2020
  39. NoviceJoe

    Are squared hull/transoms essential for a planing catamaran hull?

    NoviceJoe, Jul 22, 2020 ... 2
    Replies:
    20
    Views:
    6,042
    otseg
    Dec 27, 2020
  40. myszek

    Wave-making drag for asymmetrical hulls

    myszek, Jul 21, 2020
    Replies:
    5
    Views:
    1,935
    myszek
    Jul 24, 2020
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