Hydrodynamics and Aerodynamics

Technical discussion on fluid dynamics: theory and analysis.

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  1. parkland

    Hull speed MPG - Monohull vs pontoon

    parkland, Feb 3, 2013
    Replies:
    7
    Views:
    8,826
    haribo
    Feb 4, 2013
  2. erdben

    Interaction between hull and transom-hung rudders

    erdben, Nov 27, 2016 ... 2
    Replies:
    20
    Views:
    8,762
    erdben
    Dec 14, 2016
  3. mar.ste

    "Simple" hydrofoil addition to a laser II

    mar.ste, Sep 3, 2016 ... 2
    Replies:
    18
    Views:
    8,743
    David Cooper
    Oct 9, 2016
  4. laukejas

    Advanced questions regarding CoE - CLR balance of small boats

    laukejas, Sep 6, 2017 ... 2 3
    Replies:
    40
    Views:
    8,640
    Ben G
    Dec 13, 2017
  5. refael

    How can I calculate the size of paddle wheel?

    refael, Jan 15, 2018
    Replies:
    6
    Views:
    8,623
    Gunnar Sommerlund
    Jan 16, 2018
  6. Patrick Hickey
    Locked

    Object moving thru a fluid medium

    Patrick Hickey, Jun 8, 2017 ... 3 4 5
    Replies:
    64
    Views:
    8,600
    Boat Design Net Moderator
    Jun 13, 2017
  7. Autodafe

    Effective Aspect Ratio of Surface Piercing Rudders?

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

    Boundary-layer trip

    Remmlinger, Oct 20, 2013 ... 2 3 4
    Replies:
    48
    Views:
    8,518
    Mikko Brummer
    Nov 28, 2013
  9. dustman

    Efficiency: Hull interference vs length on catamarans

    dustman, Jun 3, 2021 ... 3 4 5
    Replies:
    70
    Views:
    8,499
    rxcomposite
    Jun 4, 2021
  10. endorium

    Aerofoil underwater

    endorium, Oct 19, 2012 ... 2 3
    Replies:
    38
    Views:
    8,457
    philSweet
    Oct 25, 2012
  11. DennisRB

    Cat hull resistance change with heel?

    DennisRB, Mar 1, 2016 ... 2 3 4
    Replies:
    49
    Views:
    8,436
    MichaelRoberts
    Apr 15, 2016
  12. passenger12358

    Airfoil CD and CL values in air and water

    passenger12358, Dec 6, 2013
    Replies:
    10
    Views:
    8,382
    passenger12358
    Dec 8, 2013
  13. CatBuilder

    Best Fan Type to Push or Pull Air?

    CatBuilder, May 20, 2012
    Replies:
    7
    Views:
    8,324
    CDK
    May 21, 2012
  14. Mathilde

    Dutch Barge Power requirement

    Mathilde, Nov 24, 2011
    Replies:
    7
    Views:
    8,177
    575
    Jul 1, 2016
  15. Autodafe

    Real benefits of hull/bridgedeck streamlining?

    Autodafe, Aug 10, 2011 ... 2
    Replies:
    25
    Views:
    8,128
    ImaginaryNumber
    Mar 12, 2012
  16. 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
  17. AlreadyWet

    Exposed or Enclosed Propeller Shaft?

    AlreadyWet, May 7, 2014 ... 2
    Replies:
    19
    Views:
    8,095
    Rastapop
    May 16, 2014
  18. Robert Jansen

    Hull speed

    Robert Jansen, Mar 7, 2014 ... 2 3
    Replies:
    33
    Views:
    8,063
    philSweet
    Mar 11, 2014
  19. bjn

    L- vs inverted T-hydrofoils on sailboats

    bjn, Mar 19, 2018 ... 2
    Replies:
    23
    Views:
    8,056
    Doug Lord
    Mar 27, 2018
  20. hprasmus

    Bow thruster friction reduction

    hprasmus, May 26, 2012
    Replies:
    11
    Views:
    7,952
    hprasmus
    Jun 19, 2012
  21. TeddyDiver

    Thoughts of resistance and leeway

    TeddyDiver, Aug 10, 2014 ... 2
    Replies:
    28
    Views:
    7,945
    Joakim
    Jan 25, 2017
  22. Chris Pap

    Slip factors

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

    Barge nose cap ideas please.

    cmitchelld, Feb 9, 2017 ... 2
    Replies:
    15
    Views:
    7,927
    cmitchelld
    Feb 26, 2017
  24. Lawrence101

    Inverted chines, strakes and a question oh no!

    Lawrence101, Jul 14, 2012
    Replies:
    13
    Views:
    7,856
    PAR
    Mar 1, 2017
  25. jmf11

    Drivers for the "sqare top" width?

    jmf11, Dec 23, 2021 ... 2 3 4
    Replies:
    51
    Views:
    7,811
    Doug Halsey
    Apr 13, 2022
  26. lunatic

    Bell Spanload Implications for Sailing?

    lunatic, Nov 19, 2017 ... 2 3
    Replies:
    39
    Views:
    7,794
    tspeer
    Feb 8, 2018
  27. HSRStudent

    Savitsky Matlab Script: Verification needed

    HSRStudent, Apr 14, 2012
    Replies:
    11
    Views:
    7,778
    HSRStudent
    Jun 6, 2012
  28. Kenneth Dodd

    Foil canoe

    Kenneth Dodd, Sep 18, 2019 ... 2
    Replies:
    26
    Views:
    7,746
    Kenneth Dodd
    Sep 30, 2019
  29. FredrikA

    Hydrodynamic form

    FredrikA, Mar 24, 2014 ... 2
    Replies:
    26
    Views:
    7,643
    FredrikA
    Mar 29, 2014
  30. dustman

    Higher Cp at higher speeds equates to less resistance?

    dustman, Dec 1, 2020 ... 4 5 6
    Replies:
    78
    Views:
    7,611
    Eric ruttan
    Dec 22, 2020
  31. splashes

    Asymetrical centreboards

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

    NACA profiles and hulls

    laserek, Oct 13, 2014 ... 2
    Replies:
    20
    Views:
    7,448
    Manfred.pech
    Oct 26, 2014
  33. Sherkin

    supercavitating hydrofoil sections

    Sherkin, Feb 18, 2014
    Replies:
    10
    Views:
    7,416
    jehardiman
    Feb 26, 2014
  34. matreid

    rudder shape/size

    matreid, Jun 26, 2013
    Replies:
    6
    Views:
    7,346
    PAR
    Jun 27, 2013
  35. Sassriverrat

    Manually hydrofoil on monohull powerboat

    Sassriverrat, Oct 4, 2017 ... 3 4 5
    Replies:
    71
    Views:
    7,343
    DCockey
    Oct 10, 2017
  36. Leo Lazauskas

    The Physical Art of Sailing

    Leo Lazauskas, Nov 24, 2014 ... 2 3
    Replies:
    42
    Views:
    7,339
    CT249
    Dec 27, 2014
  37. rspawarr

    Force Exerted By Towed Object On Tug At Different Speed

    rspawarr, Oct 10, 2013
    Replies:
    12
    Views:
    7,326
    jonr
    Oct 17, 2013
  38. Howlandwoodworks

    NACA # for a long keels?

    Howlandwoodworks, Jul 9, 2019 ... 2
    Replies:
    17
    Views:
    7,313
    rnlock
    Nov 13, 2019
  39. Erwan

    Reverse-Engineering of Modern Cat hull shape

    Erwan, Jul 30, 2012 ... 2
    Replies:
    26
    Views:
    7,299
    Erwan
    Aug 11, 2012
  40. manon

    Energy Efficiency Design Index

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