Props

Propeller selection, performance comparison, prediction, experience, and modification.

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  1. Nescio

    Shaft-generator on Tall ship

    Nescio, Jan 28, 2020
    Replies:
    5
    Views:
    1,772
    Adler
    Mar 1, 2020
  2. mike w. schultz

    Hi Thrust prop for outboard (twin) Power Trimaran

    mike w. schultz, Feb 28, 2020
    Replies:
    3
    Views:
    1,604
    Mr Efficiency
    Feb 28, 2020
  3. DennisRB

    Sizing prop and gear ratio for semi displacement speed cat?

    DennisRB, Jan 15, 2020
    Replies:
    5
    Views:
    2,092
    missinginaction
    Jan 19, 2020
  4. french44

    kaplan propellor looking for

    french44, Nov 18, 2011
    Replies:
    14
    Views:
    5,466
    Javier Allende
    Dec 16, 2019
  5. alby joy

    3 bladed propeller vs 4 bladed propeller

    alby joy, Apr 18, 2019 ... 2 3
    Replies:
    31
    Views:
    5,034
    powerabout
    Dec 14, 2019
  6. Callum Stark

    Ka4-55 with 19A Duct Model

    Callum Stark, Oct 25, 2019
    Replies:
    1
    Views:
    2,102
    jehardiman
    Nov 17, 2019
  7. Divan

    Prop Power Consumption

    Divan, Sep 6, 2019 ... 2
    Replies:
    15
    Views:
    3,298
    gonzo
    Sep 9, 2019
  8. NautiPhillip

    Low rpm prop for high torque diesel engine

    NautiPhillip, Sep 6, 2019
    Replies:
    5
    Views:
    3,329
    NautiPhillip
    Sep 7, 2019
  9. pdwiley

    Another Controllable Pitch Prop - a PNP Duerr Coaster

    pdwiley, Aug 26, 2016
    Replies:
    1
    Views:
    2,328
    Jozee
    Aug 11, 2019
  10. freddyj

    Small folding/feathering prop

    freddyj, Jul 14, 2019
    Replies:
    6
    Views:
    1,710
    JSL
    Aug 5, 2019
  11. Shannon Billman

    Choosing correct prop

    Shannon Billman, Jun 25, 2019
    Replies:
    2
    Views:
    1,758
    JSL
    Aug 1, 2019
  12. Ogrim

    Dimensionning Propeller WAGENINGEN Du-Delta diagram

    Ogrim, Jul 31, 2019
    Replies:
    1
    Views:
    1,803
    jehardiman
    Jul 31, 2019
  13. A Frayed Knot

    Racing Powerboat Prop Selection

    A Frayed Knot, Jul 25, 2019
    Replies:
    4
    Views:
    1,778
    Yellowjacket
    Jul 31, 2019
  14. BadCo

    Need help prop tuning....

    BadCo, Jul 20, 2019
    Replies:
    8
    Views:
    1,513
    Mr Efficiency
    Jul 21, 2019
  15. crankshaft

    Prop for a 27’ uniflite. (Big hp increase)

    crankshaft, Jul 14, 2019
    Replies:
    1
    Views:
    1,315
    missinginaction
    Jul 15, 2019
  16. Michelle Elliott

    3 blade propeller vs 4 blade propeller

    Michelle Elliott, Jun 27, 2019
    Replies:
    12
    Views:
    12,018
    Mr Efficiency
    Jul 1, 2019
  17. get reel

    repowered boat prop help needed

    get reel, Jun 26, 2019
    Replies:
    2
    Views:
    1,298
    baeckmo
    Jun 26, 2019
  18. steven starnes

    Willard MK4 prop

    steven starnes, Jun 24, 2019
    Replies:
    1
    Views:
    1,000
    gonzo
    Jun 25, 2019
  19. Tiny Turnip

    Propellor for pedal powered catamaran

    Tiny Turnip, Mar 31, 2008 ... 2 3
    Replies:
    41
    Views:
    53,826
    jit89
    Jun 17, 2019
  20. Squidly-Diddly

    few interesting claims about new prop with front and back vanes

    Squidly-Diddly, Jun 1, 2019
    Replies:
    0
    Views:
    1,051
    Squidly-Diddly
    Jun 1, 2019
  21. koios

    Prop design for low wattage boat

    koios, Apr 9, 2019 ... 2
    Replies:
    17
    Views:
    3,339
    jehardiman
    Apr 18, 2019
  22. Harmono Sri Waluyo

    Steering Gear

    Harmono Sri Waluyo, Mar 30, 2019
    Replies:
    0
    Views:
    1,021
    Harmono Sri Waluyo
    Mar 30, 2019
  23. missinginaction

    Replacing a damaged rudder

    missinginaction, Mar 9, 2019
    Replies:
    9
    Views:
    1,752
    missinginaction
    Mar 16, 2019
  24. Steamboat_Ed

    .dxf files??

    Steamboat_Ed, Mar 4, 2019
    Replies:
    2
    Views:
    986
    Adler
    Mar 5, 2019
  25. seadago

    prop duct on a sail boat

    seadago, Feb 28, 2019
    Replies:
    8
    Views:
    1,744
    seadago
    Mar 2, 2019
  26. PetterM

    Sizing Segmental Section Commercially Available Propellers for Small Craft

    PetterM, Feb 18, 2019
    Replies:
    2
    Views:
    1,849
    PetterM
    Feb 21, 2019
  27. rfleet1066

    River Boat prop

    rfleet1066, Feb 13, 2019
    Replies:
    7
    Views:
    2,170
    johneck
    Feb 14, 2019
  28. Hans Christian

    Standard propeller diameter depends on boat length, RPM, engine HP and/or load

    Hans Christian, Feb 7, 2019
    Replies:
    2
    Views:
    2,343
    kapnD
    Feb 8, 2019
  29. Gman999

    Designing a propeller using Gawn Standard Series propeller (URGENT)

    Gman999, Jan 22, 2019
    Replies:
    3
    Views:
    4,059
    jehardiman
    Jan 24, 2019
  30. Rickard M

    Prop design 3D print small electric boat

    Rickard M, Dec 14, 2018
    Replies:
    0
    Views:
    2,356
    Rickard M
    Dec 14, 2018
  31. Magnus W

    Low on rpm, going from four to five blades?

    Magnus W, Dec 3, 2018
    Replies:
    9
    Views:
    1,838
    Magnus W
    Dec 8, 2018
  32. CBTerry

    Prop math 2.0

    CBTerry, Nov 23, 2018
    Replies:
    8
    Views:
    1,589
    ondarvr
    Nov 26, 2018
  33. Evan Jones

    Thai long-tail prop stockists in Bangkok area

    Evan Jones, Oct 27, 2018
    Replies:
    0
    Views:
    991
    Evan Jones
    Oct 27, 2018
  34. gerald2502

    Need help with propulsion calculations

    gerald2502, Oct 13, 2018
    Replies:
    5
    Views:
    1,854
    BlueBell
    Oct 18, 2018
  35. mcl

    Propeller testing and reviews mercury vs solas

    mcl, Sep 7, 2018
    Replies:
    0
    Views:
    24,209
    mcl
    Sep 7, 2018
  36. valvebounce

    Lighter boat, prop change?

    valvebounce, Jun 20, 2018
    Replies:
    8
    Views:
    4,328
    valvebounce
    Aug 10, 2018
  37. the brain

    have I ruined another prop?

    the brain, Aug 20, 2017
    Replies:
    14
    Views:
    2,123
    Mr Efficiency
    Aug 10, 2018
  38. OldShell

    Prop Guard for Pedal Powered Raft

    OldShell, May 5, 2018
    Replies:
    13
    Views:
    2,555
    alan craig
    Jul 30, 2018
  39. fusioneng

    unusual need for high pitch prop on Honda BF 2.3

    fusioneng, Apr 13, 2014 ... 2
    Replies:
    15
    Views:
    11,011
    fallguy
    Jul 10, 2018
  40. Ramona

    Prop required for a 16 foot displacement boat.

    Ramona, Jun 26, 2018
    Replies:
    6
    Views:
    2,367
    baeckmo
    Jul 2, 2018
Showing threads 81 to 120 of 536

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