Hydrodynamics and Aerodynamics

Technical discussion on fluid dynamics: theory and analysis.

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  1. Alexanov

    Catamaran resistance

    Alexanov, Jan 13, 2025 ... 2
    Replies:
    18
    Views:
    2,137
    FESB
    Feb 20, 2025
  2. seasquirt

    Sailing in the shade

    seasquirt, Feb 15, 2025
    Replies:
    5
    Views:
    678
    seasquirt
    Feb 18, 2025
  3. montero

    Aerodynamic table

    montero, Feb 4, 2025 ... 2
    Replies:
    19
    Views:
    2,055
    montero
    Feb 13, 2025
  4. JC Campbell

    Water ballast

    JC Campbell, Dec 14, 2024 ... 2 3 4
    Replies:
    59
    Views:
    2,902
    Dave G 9N
    Feb 10, 2025
  5. Joonatan

    aft height effect on hull resistance on a vessel

    Joonatan, Feb 4, 2025
    Replies:
    2
    Views:
    663
    BlueBell
    Feb 4, 2025
  6. aiprt

    Forces on mast foot

    aiprt, Nov 11, 2024 ... 2
    Replies:
    21
    Views:
    2,580
    CT249
    Jan 31, 2025
  7. Boston Hatteras

    Interceptor type hull trim devices

    Boston Hatteras, Jan 2, 2025
    Replies:
    6
    Views:
    1,154
    BMcF
    Jan 17, 2025
  8. mc_rash

    heave oscillation floating body

    mc_rash, Jan 12, 2025
    Replies:
    2
    Views:
    695
    ropf
    Jan 12, 2025
  9. CarlosK2

    The Contact Patch

    CarlosK2, Aug 13, 2024 ... 2
    Replies:
    20
    Views:
    2,752
    gonzo
    Jan 6, 2025
  10. Mikko Brummer

    Is circulation real?

    Mikko Brummer, Jan 25, 2013 ... 50 51 52
    Replies:
    765
    Views:
    94,508
    Sailor Al
    Jan 4, 2025
  11. Thinkoutbox

    Direct Upwind Sailing

    Thinkoutbox, Dec 25, 2024 ... 3 4 5
    Replies:
    73
    Views:
    3,740
    montero
    Jan 4, 2025
  12. Slingshot

    Foil section? For foil board

    Slingshot, Dec 24, 2019 ... 2 3
    Replies:
    34
    Views:
    13,877
    Erwan
    Dec 22, 2024
  13. ijonjio

    Calculating Boat's Diesel Consumption

    ijonjio, Dec 18, 2024
    Replies:
    4
    Views:
    910
    gonzo
    Dec 19, 2024
  14. Maarten88

    High Camber hydrofoil section for wingfoiler

    Maarten88, Jan 21, 2024
    Replies:
    10
    Views:
    5,056
    Rasmus Sass
    Dec 9, 2024
  15. motorbike

    Keel Section

    motorbike, Feb 21, 2015 ... 2 3
    Replies:
    40
    Views:
    14,392
    Alan Cattelliot
    Nov 27, 2024
  16. kenfyoozed

    Tritoon center log not parallel

    kenfyoozed, Nov 9, 2024
    Replies:
    14
    Views:
    1,366
    kenfyoozed
    Nov 10, 2024
  17. naserrishehri

    Emergency Sailing With 1 Side Engine

    naserrishehri, Oct 29, 2024 ... 2
    Replies:
    15
    Views:
    1,893
    BlueBell
    Nov 3, 2024
  18. Vincent DePillis

    Could adding a Yankee power up my F31 upwind?

    Vincent DePillis, Oct 8, 2024
    Replies:
    7
    Views:
    1,733
    Paul Scott
    Oct 14, 2024
  19. Aaarrrggghhh

    Americas Cup Foils

    Aaarrrggghhh, Oct 1, 2024
    Replies:
    2
    Views:
    2,008
    Aaarrrggghhh
    Oct 6, 2024
  20. Paul Scott

    Kline Fogelman airfoils for sailboats?

    Paul Scott, Oct 3, 2024
    Replies:
    2
    Views:
    1,701
    Paul Scott
    Oct 4, 2024
  21. Heimfried

    To install kind of leeboards at a solar electric katamaran

    Heimfried, Sep 16, 2024 ... 2
    Replies:
    15
    Views:
    2,615
    jmwoodring
    Sep 30, 2024
  22. Collin

    Distribution of rocker.

    Collin, Nov 3, 2011 ... 2 3 4
    Replies:
    53
    Views:
    19,892
    hosscara
    Sep 28, 2024
  23. jmf11

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

    jmf11, Aug 26, 2024
    Replies:
    11
    Views:
    2,215
    CT249
    Sep 16, 2024
  24. Michael Lambert

    Questions about surface tension

    Michael Lambert, Aug 4, 2024 ... 2
    Replies:
    21
    Views:
    3,128
    Will Gilmore
    Sep 15, 2024
  25. Senrab

    Building a scaled down International 505 dinghy

    Senrab, Aug 2, 2013
    Replies:
    13
    Views:
    6,781
    Lupa
    Sep 10, 2024
  26. jmwoodring

    What are these and what effect might they have on hydrodynamics?

    jmwoodring, Aug 25, 2024
    Replies:
    9
    Views:
    2,503
    kapnD
    Aug 29, 2024
  27. Sailor Al

    Was Marchaj having us on?

    Sailor Al, Apr 12, 2021 ... 15 16 17
    Replies:
    246
    Views:
    31,720
    Sailor Al
    Aug 14, 2024
  28. hashtag_laeuft

    Daggerboard position: Maneuverability VS. Acceleration

    hashtag_laeuft, Mar 22, 2024 ... 2 3
    Replies:
    35
    Views:
    6,976
    CT249
    Aug 1, 2024
  29. Sailor Al

    Swept Volume Theory

    Sailor Al, Aug 2, 2022 ... 22 23 24
    Replies:
    349
    Views:
    42,216
    CarlosK2
    Jul 28, 2024
  30. CarlosK2

    Fossati, Politecnico di Milano Wind Tunnel

    CarlosK2, Jul 20, 2024
    Replies:
    14
    Views:
    2,076
    CarlosK2
    Jul 20, 2024
  31. Sailor Al

    Fossati's Aero-Hydrodyamics

    Sailor Al, Jun 27, 2024 ... 4 5 6
    Replies:
    86
    Views:
    7,779
    Sailor Al
    Jul 19, 2024
  32. pitbull

    motoring sideways to boost upwind VMG

    pitbull, Jul 16, 2024
    Replies:
    2
    Views:
    2,036
    Will Gilmore
    Jul 16, 2024
  33. K33von

    Extending 18 ft boat at the transom

    K33von, Jul 3, 2024
    Replies:
    8
    Views:
    2,399
    Barry
    Jul 11, 2024
  34. andrew spiteri

    Air Lubrication Drag Reduction for Smaller Vessels

    andrew spiteri, Jan 10, 2024 ... 3 4 5
    Replies:
    68
    Views:
    11,679
    jakeeeef
    Jul 7, 2024
  35. Arton

    Does anyone Know about Slamming load

    Arton, Jul 5, 2024
    Replies:
    7
    Views:
    2,300
    Arton
    Jul 6, 2024
  36. Dieter51

    Naca Airfoils shape and rocker oft flat bottomed boats

    Dieter51, Jun 9, 2024 ... 3 4 5
    Replies:
    73
    Views:
    6,619
    Dieter51
    Jul 6, 2024
  37. mitch184

    Breakaway angle/rise off transom

    mitch184, Jun 12, 2024
    Replies:
    2
    Views:
    2,334
    mitch184
    Jul 2, 2024
  38. Erwan

    Sail's 2D Section Drag & Surface Roughness

    Erwan, Jun 2, 2024
    Replies:
    2
    Views:
    2,155
    Erwan
    Jul 2, 2024
  39. Heimfried

    What foil to reduce drag at circular motor shaft?

    Heimfried, Jun 5, 2024
    Replies:
    14
    Views:
    2,759
    philSweet
    Jun 21, 2024
  40. Habar Khan

    How to calculate pitch angle and roll angle

    Habar Khan, Jun 21, 2024
    Replies:
    0
    Views:
    2,040
    Habar Khan
    Jun 21, 2024
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