Hydrodynamics and Aerodynamics

Technical discussion on fluid dynamics: theory and analysis.

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  1. Grunf

    Windsurf raked sail

    Grunf, Nov 22, 2020 ... 2 3
    Replies:
    31
    Views:
    5,846
    Steve Clark
    Dec 30, 2020
  2. Dejay

    Aquila Hydro-Glide Foil System with 35% fuel saving

    Dejay, Apr 4, 2019 ... 2 3
    Replies:
    31
    Views:
    8,118
    Dejay
    Jun 10, 2019
  3. 23feet

    Flat plate rudder vs naca drag

    23feet, Mar 20, 2016 ... 2 3
    Replies:
    31
    Views:
    13,809
    rwatson
    Apr 14, 2016
  4. Chris Pap

    Slip factors

    Chris Pap, Jan 14, 2015 ... 2 3
    Replies:
    31
    Views:
    7,928
    sandhammaren05
    Mar 10, 2015
  5. manon

    Energy Efficiency Design Index

    manon, Apr 29, 2011 ... 2 3
    Replies:
    31
    Views:
    7,292
    philSweet
    Aug 4, 2011
  6. tropostudio

    Wave Tank Question

    tropostudio, Nov 16, 2021 ... 2 3
    Replies:
    30
    Views:
    5,470
    tropostudio
    Dec 7, 2022
  7. mitchgrunes

    How much less efficient would a planing hull sea kayak be?

    mitchgrunes, Jul 11, 2020 ... 2 3
    Replies:
    30
    Views:
    7,066
    mitchgrunes
    Jul 23, 2020
  8. CasparvdBroek

    Help find copy of Fekete article

    CasparvdBroek, Jan 19, 2018 ... 2 3
    Replies:
    30
    Views:
    6,035
    CasparvdBroek
    May 16, 2018
  9. mij

    Outward facing J/foils on a cat

    mij, Aug 25, 2015 ... 2 3
    Replies:
    30
    Views:
    9,863
    mij
    Aug 1, 2017
  10. splashes

    Asymetrical centreboards

    splashes, Apr 16, 2014 ... 2 3
    Replies:
    30
    Views:
    7,536
    bruceb
    Aug 12, 2014
  11. quequen

    Added Resistance in Waves

    quequen, Jan 30, 2014 ... 2
    Replies:
    29
    Views:
    10,103
    Pablo Sopelana
    Jan 14, 2022
  12. container

    Bell shaped lift distribution

    container, May 19, 2020 ... 2
    Replies:
    29
    Views:
    5,922
    Jean Baptiste
    Jun 25, 2020
  13. rob denney

    Foil performance discussion

    rob denney, Jul 19, 2015 ... 2
    Replies:
    29
    Views:
    9,064
    sigurd
    May 31, 2016
  14. AndySGray

    Hull Efficiency today vs. 25, 50 and 100 years ago?

    AndySGray, May 15, 2015 ... 2
    Replies:
    29
    Views:
    10,336
    Rurudyne
    Jun 14, 2015
  15. TobiasJohan

    Porpoising

    TobiasJohan, Oct 21, 2014 ... 2
    Replies:
    29
    Views:
    3,745
    PAR
    Oct 24, 2014
  16. Autodafe

    Effective Aspect Ratio of Surface Piercing Rudders?

    Autodafe, Apr 7, 2013 ... 2
    Replies:
    29
    Views:
    8,596
    Autodafe
    Apr 16, 2013
  17. mrmac

    gelcoat V's painted finish

    mrmac, Dec 16, 2011 ... 2
    Replies:
    29
    Views:
    10,087
    fcfc
    Feb 29, 2012
  18. previah

    resistance scaling

    previah, Jan 19, 2012 ... 2
    Replies:
    29
    Views:
    3,981
    previah
    Jan 24, 2012
  19. Revboat

    Aerodynamics of 'overlapped' staysails

    Revboat, Jun 23, 2021 ... 2
    Replies:
    28
    Views:
    6,060
    brian eiland
    Oct 19, 2023
  20. useless33

    Lateral Hunting/Wandering on plane

    useless33, Mar 27, 2021 ... 2
    Replies:
    28
    Views:
    2,282
    Mr Efficiency
    Apr 5, 2021
  21. Hildershavn

    Pressure sensors for measuring pressure field on the bottom of the planing hull?

    Hildershavn, Oct 20, 2017 ... 2
    Replies:
    28
    Views:
    4,841
    gonzo
    Oct 31, 2017
  22. TeddyDiver

    Thoughts of resistance and leeway

    TeddyDiver, Aug 10, 2014 ... 2
    Replies:
    28
    Views:
    7,944
    Joakim
    Jan 25, 2017
  23. markdrela

    Online aero course

    markdrela, Mar 3, 2014 ... 2
    Replies:
    28
    Views:
    10,321
    JotM
    Jan 14, 2017
  24. Konstanty

    Wing of the "Kasperwing" in sailing?

    Konstanty, May 2, 2016 ... 2
    Replies:
    28
    Views:
    19,006
    Petros
    Nov 3, 2016
  25. gonzo

    Resistance of submarines at different depths.

    gonzo, Apr 26, 2013 ... 2
    Replies:
    28
    Views:
    6,038
    tomas
    May 25, 2013
  26. viking north

    Articulating Foil Tail

    viking north, Apr 3, 2013 ... 2
    Replies:
    28
    Views:
    4,352
    Leo Lazauskas
    Apr 7, 2013
  27. daiquiri

    An impressive CFD simulation on a Cray XE6 supercomputer

    daiquiri, Nov 2, 2012 ... 2
    Replies:
    28
    Views:
    5,684
    daiquiri
    Nov 7, 2012
  28. CatBuilder

    Hydrodynamic Drag Of Sail Drive

    CatBuilder, Feb 24, 2012 ... 2
    Replies:
    28
    Views:
    9,648
    groper
    Mar 1, 2012
  29. LongCruise

    Active Drag Reduction?

    LongCruise, Mar 15, 2021 ... 2
    Replies:
    27
    Views:
    7,231
    BMcF
    Jan 28, 2022
  30. lohring

    Lowest Drag for hydrofoil designs

    lohring, Oct 25, 2013 ... 2
    Replies:
    27
    Views:
    12,278
    tspeer
    Nov 9, 2013
  31. daiquiri

    A note of caution about technical papers (example included)

    daiquiri, Jun 4, 2012 ... 2
    Replies:
    27
    Views:
    3,898
    BeppeZena
    Jun 15, 2012
  32. Expandacraft

    Drag coefficient test on the cheap?

    Expandacraft, Dec 31, 2011 ... 2
    Replies:
    27
    Views:
    6,056
    JotM
    Feb 15, 2012
  33. Lynton Banks

    Lifting strakes do they produce lift in the submerged sections

    Lynton Banks, Jan 27, 2023 ... 2
    Replies:
    26
    Views:
    3,619
    Lynton Banks
    Feb 5, 2023
  34. member74761

    Stringer Bedding, cushion or gap spacing

    member74761, Aug 16, 2021 ... 2
    Replies:
    26
    Views:
    4,684
    Scuff
    Sep 7, 2021
  35. Luke Frisbee

    DIY axial flow pump, fractional hp motor, highest level of water through 6 inch diameter 30 ft pipe

    Luke Frisbee, May 5, 2021 ... 2
    Replies:
    26
    Views:
    3,751
    Dejay
    May 11, 2021
  36. jbo_c

    Barge efficiency-displacement speed

    jbo_c, Mar 30, 2020 ... 2
    Replies:
    26
    Views:
    4,111
    Mr Efficiency
    Mar 31, 2020
  37. Kenneth Dodd

    Foil canoe

    Kenneth Dodd, Sep 18, 2019 ... 2
    Replies:
    26
    Views:
    7,746
    Kenneth Dodd
    Sep 30, 2019
  38. rwatson

    Comparing Righting Moments

    rwatson, Apr 26, 2018 ... 2
    Replies:
    26
    Views:
    4,178
    TANSL
    Apr 28, 2018
  39. alexz

    Dragon Boat Drag Calculations

    alexz, Mar 22, 2011 ... 2
    Replies:
    26
    Views:
    13,067
    Jamie Kennedy
    Jun 20, 2015
  40. Sherkin

    Large Hydrofoil/heaveplate

    Sherkin, Feb 13, 2014 ... 2
    Replies:
    26
    Views:
    6,693
    johnhazel
    Apr 18, 2014
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