Hydrodynamics and Aerodynamics

Technical discussion on fluid dynamics: theory and analysis.

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  1. Vincent DePilli

    Aero benefits of a straight forestay

    Vincent DePilli, Apr 24, 2013 ... 2 3
    Replies:
    40
    Views:
    6,543
    viking north
    May 22, 2013
  2. Mat-C

    Entry Angle vs Hollow Waterlines

    Mat-C, Apr 16, 2012 ... 2 3
    Replies:
    40
    Views:
    11,023
    vandutch
    May 3, 2012
  3. rwatson

    Flettner Rotors - Calculating Rotating Skin Friction

    rwatson, Jun 16, 2018 ... 2 3
    Replies:
    39
    Views:
    10,776
    rwatson
    Jan 28, 2023
  4. Mike Goebel

    Pocket Drive - modifications - photos

    Mike Goebel, Jan 27, 2022 ... 2 3
    Replies:
    39
    Views:
    4,623
    DogCavalry
    Feb 21, 2022
  5. fpjeepy05

    Using Interceptors for Steering

    fpjeepy05, Feb 6, 2013 ... 2 3
    Replies:
    39
    Views:
    9,665
    DogCavalry
    Oct 23, 2019
  6. rallyhybrid

    Using hydrofoil for race kayak stability

    rallyhybrid, Sep 14, 2018 ... 2 3
    Replies:
    39
    Views:
    6,481
    Steve Clark
    Jan 1, 2019
  7. lunatic

    Bell Spanload Implications for Sailing?

    lunatic, Nov 19, 2017 ... 2 3
    Replies:
    39
    Views:
    7,750
    tspeer
    Feb 8, 2018
  8. Doug Lord

    Volvo Inshore Foiler--Technical Design Information

    Doug Lord, Nov 18, 2017 ... 2 3
    Replies:
    39
    Views:
    5,924
    Doug Lord
    Nov 29, 2017
  9. sottorf

    MARINTEK VERES: catamaran seakeeping calculations

    sottorf, Aug 18, 2012 ... 2 3
    Replies:
    39
    Views:
    9,253
    Ad Hoc
    Aug 29, 2012
  10. DennisRB

    Anti Vortex Plates instead of boards?

    DennisRB, Oct 7, 2011 ... 2 3
    Replies:
    39
    Views:
    12,101
    tspeer
    Oct 17, 2011
  11. Glattnos

    Designing a 360cm(11ft) powerboat hull, suggestions?

    Glattnos, Jul 14, 2018 ... 2 3
    Replies:
    38
    Views:
    5,465
    fishwics
    Sep 20, 2018
  12. tspeer

    Sailing Performance In a Nonuniform Wind

    tspeer, Nov 13, 2013 ... 2 3
    Replies:
    38
    Views:
    5,897
    tspeer
    Nov 25, 2013
  13. endorium

    Aerofoil underwater

    endorium, Oct 19, 2012 ... 2 3
    Replies:
    38
    Views:
    8,432
    philSweet
    Oct 25, 2012
  14. sharpii2

    Most Weatherly Schooner

    sharpii2, Aug 26, 2021 ... 2 3
    Replies:
    37
    Views:
    6,315
    Howlandwoodworks
    Sep 25, 2021
  15. motorbike

    Keel Section

    motorbike, Feb 21, 2015 ... 2 3
    Replies:
    37
    Views:
    11,425
    Jamie Kennedy
    Jul 3, 2015
  16. Toolate

    Outboard motor skeg mounted foil?

    Toolate, Dec 31, 2017 ... 2 3
    Replies:
    36
    Views:
    12,187
    Dale MacDonald
    Jun 4, 2019
  17. Graemecb1971

    Leeboards: professional or 'have a go'?

    Graemecb1971, Jul 2, 2022 ... 2 3
    Replies:
    35
    Views:
    3,214
    Graemecb1971
    Jul 5, 2022
  18. Squidly-Diddly

    Can I make this table top fan QUIETER by modding the blades or something else?

    Squidly-Diddly, Aug 6, 2015 ... 2 3
    Replies:
    35
    Views:
    29,474
    upchurchmr
    Aug 24, 2015
  19. DennisRB

    Bow extensions

    DennisRB, Jan 14, 2015 ... 2 3
    Replies:
    35
    Views:
    10,728
    DennisRB
    Jan 17, 2015
  20. Mikko Brummer

    Foiling boats weight sensitivity?

    Mikko Brummer, Jun 15, 2021 ... 2 3
    Replies:
    34
    Views:
    5,349
    FoilAddict
    Jun 23, 2021
  21. Kit_L

    Can a sharpie-inspired trawler's lively movement be tamed?

    Kit_L, Dec 25, 2019 ... 2 3
    Replies:
    34
    Views:
    4,881
    Kit_L
    Jan 5, 2020
  22. vejas

    Dihedral hydrofoil lift calculations

    vejas, Nov 19, 2018 ... 2 3
    Replies:
    34
    Views:
    12,058
    Doug Lord
    Dec 31, 2018
  23. steffen19k

    Random Insanity.

    steffen19k, Jun 25, 2016 ... 2 3
    Replies:
    34
    Views:
    4,609
    steffen19k
    Jul 10, 2016
  24. matt_bob

    Windsurfing Sail and mast design

    matt_bob, Apr 13, 2015 ... 2 3
    Replies:
    34
    Views:
    9,415
    Erwan
    May 12, 2015
  25. Leo Lazauskas

    Skin Friction Lines - Some Comparisons

    Leo Lazauskas, Feb 15, 2013 ... 2 3
    Replies:
    34
    Views:
    12,463
    sigurd
    Sep 12, 2013
  26. SURFFOILS

    Flexible Hulls.

    SURFFOILS, Dec 26, 2011 ... 2 3
    Replies:
    34
    Views:
    9,580
    tunnels
    Jan 31, 2012
  27. Jacques_clue_no

    Need help calculating headwind drag in watts from force in newtons

    Jacques_clue_no, Jul 20, 2012 ... 2 3
    Replies:
    33
    Views:
    9,356
    dustman
    Jul 14, 2019
  28. massandspace

    Looking for help determine speed and power requirements of potential power catamaran

    massandspace, Nov 8, 2017 ... 2 3
    Replies:
    33
    Views:
    4,946
    TANSL
    Nov 16, 2017
  29. johan gronvall

    Flowfield calculations in javafoil

    johan gronvall, Dec 30, 2014 ... 2 3
    Replies:
    33
    Views:
    9,200
    Humberto
    Feb 28, 2015
  30. Robert Jansen

    Hull speed

    Robert Jansen, Mar 7, 2014 ... 2 3
    Replies:
    33
    Views:
    8,052
    philSweet
    Mar 11, 2014
  31. Bukmaster9

    Tunnel in Hull

    Bukmaster9, Jun 18, 2021 ... 2 3
    Replies:
    32
    Views:
    4,479
    Bukmaster9
    Jun 23, 2021
  32. Konstanty

    Induced drag

    Konstanty, Aug 15, 2018 ... 2 3
    Replies:
    32
    Views:
    7,210
    patzefran
    Apr 12, 2019
  33. ross whitaker

    Increasing the Efficiency of a hydrofoil dagger board *HELP*

    ross whitaker, Feb 16, 2018 ... 2 3
    Replies:
    32
    Views:
    6,592
    tspeer
    May 5, 2018
  34. Southern Cross

    Quick Water Ballast Question

    Southern Cross, Oct 11, 2017 ... 2 3
    Replies:
    32
    Views:
    5,652
    TANSL
    Oct 14, 2017
  35. rwar

    Wave Creation

    rwar, Jan 25, 2016 ... 2 3
    Replies:
    32
    Views:
    6,015
    daiquiri
    Jan 27, 2016
  36. MantaRay

    Questioning airfoil design of WIG craft

    MantaRay, Mar 10, 2013 ... 2 3
    Replies:
    32
    Views:
    21,657
    DennisRB
    May 2, 2013
  37. PI Design

    Unusual Foil Requirement - Thoughts?

    PI Design, Jul 19, 2012 ... 2 3
    Replies:
    32
    Views:
    6,020
    tspeer
    Jul 31, 2012
  38. vignesh

    improving performance - reverse bulbous bow principle, amplify wave near stern

    vignesh, Oct 6, 2011 ... 2 3
    Replies:
    32
    Views:
    9,437
    Leo Lazauskas
    Mar 19, 2012
  39. jmf11

    Crude simulation for free standing mast - sail - luff curve ?

    jmf11, Aug 6, 2021 ... 2 3
    Replies:
    31
    Views:
    4,937
    jmf11
    Aug 15, 2021
  40. dustman

    Efficiency: Submerged transoms

    dustman, Jun 3, 2021 ... 2 3
    Replies:
    31
    Views:
    4,336
    Mr Efficiency
    Jun 5, 2021
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