Props

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

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  1. apex1
    Locked

    The Controllable Pitch Propeller, a summary.

    apex1, Dec 26, 2009 ... 13 14 15
    Replies:
    222
    Views:
    74,354
    TeddyDiver
    Oct 12, 2012
  2. missinginaction

    The mystery of a proper prop and terrible performance

    missinginaction, Jan 25, 2020 ... 11 12 13
    Replies:
    184
    Views:
    32,329
    missinginaction
    Sep 30, 2024
  3. Asleep Helmsman

    Power Required

    Asleep Helmsman, Jan 5, 2010 ... 7 8 9
    Replies:
    133
    Views:
    22,460
    Joakim
    Feb 28, 2010
  4. tom kane

    How do propellers propell a boat.

    tom kane, Mar 12, 2015 ... 7 8 9
    Replies:
    126
    Views:
    25,951
    jehardiman
    Apr 27, 2015
  5. RayThackeray

    Prop calculators - is there a difference between electric and diesel drives?

    RayThackeray, Nov 14, 2011 ... 5 6 7
    Replies:
    91
    Views:
    20,876
    tugboat
    Mar 10, 2012
  6. BertKu

    Turning Clock or anti clock wise

    BertKu, Dec 28, 2012 ... 4 5 6
    Replies:
    78
    Views:
    18,507
    BertKu
    Mar 4, 2013
  7. Sindel

    a prop's rake

    Sindel, Aug 7, 2009 ... 4 5 6
    Replies:
    75
    Views:
    19,313
    Sindel
    Aug 17, 2009
  8. Duco84

    Propeller size

    Duco84, May 26, 2015 ... 3 4 5
    Replies:
    70
    Views:
    18,815
    Duco84
    Aug 7, 2015
  9. michaeljc

    Prop tip velocity

    michaeljc, Jun 10, 2013 ... 3 4 5
    Replies:
    62
    Views:
    18,995
    gonzo
    Jun 23, 2013
  10. Red Dwarf

    Controlable Pitch Prop low rpm efficiency question

    Red Dwarf, Sep 18, 2012 ... 3 4 5
    Replies:
    62
    Views:
    14,980
    FAST FRED
    Oct 3, 2012
  11. bblagonic

    prop doing bad

    bblagonic, Oct 24, 2009 ... 3 4 5
    Replies:
    62
    Views:
    18,738
    Joakim
    Jan 27, 2010
  12. DogCavalry

    Oversized prop compromise

    DogCavalry, Sep 24, 2020 ... 2 3 4
    Replies:
    54
    Views:
    10,930
    DogCavalry
    Feb 12, 2021
  13. cmaas

    Electric hydrofoil prop

    cmaas, Sep 8, 2020 ... 2 3 4
    Replies:
    53
    Views:
    10,938
    johneck
    Jan 6, 2022
  14. Mik the stick

    The great controlable pitch prop debate.

    Mik the stick, Dec 12, 2012 ... 2 3 4
    Replies:
    51
    Views:
    8,032
    powerabout
    Dec 18, 2012
  15. Dave G 9N

    Atkin's Happy Clam's propeller

    Dave G 9N, Sep 15, 2024 ... 2 3 4
    Replies:
    48
    Views:
    3,815
    rangebowdrie
    Oct 16, 2024
  16. sailor0000

    Propeller calculations - HELP!

    sailor0000, Dec 27, 2012 ... 2 3 4
    Replies:
    48
    Views:
    15,570
    JSL
    Jan 11, 2013
  17. NWestward

    Thoughts on prop load for com-fish/tow boat

    NWestward, Apr 23, 2024 ... 2 3
    Replies:
    44
    Views:
    4,255
    comfisherman
    Sep 16, 2024
  18. Per S

    Speed/slip problem

    Per S, Jan 4, 2005 ... 2 3
    Replies:
    43
    Views:
    16,324
    ljwhisenant
    Jul 17, 2005
  19. BlueBell

    What R/C Props to Try?

    BlueBell, Nov 19, 2017 ... 2 3
    Replies:
    42
    Views:
    6,972
    BlueBell
    Dec 19, 2017
  20. Tiny Turnip

    Propellor for pedal powered catamaran

    Tiny Turnip, Mar 31, 2008 ... 2 3
    Replies:
    41
    Views:
    56,389
    jit89
    Jun 17, 2019
  21. kistinie

    Controllable Pitch Propeller for lower power & electric motors

    kistinie, Jan 2, 2010 ... 2 3
    Replies:
    41
    Views:
    17,658
    powerabout
    Jul 9, 2010
  22. hwsiii

    Can a motor produce the same HP at different RPM with different Loads

    hwsiii, Jan 23, 2010 ... 2 3
    Replies:
    40
    Views:
    11,451
    powerabout
    May 31, 2010
  23. FAST FRED

    Variable DIAMETER ? Prop

    FAST FRED, Mar 2, 2010 ... 2 3
    Replies:
    40
    Views:
    8,402
    TeddyDiver
    Apr 5, 2010
  24. Slowboating

    Outboard prop modifications

    Slowboating, Oct 22, 2021 ... 2 3
    Replies:
    39
    Views:
    6,307
    johneck
    Nov 30, 2021
  25. sottorf

    Strange Propeller

    sottorf, Sep 17, 2012 ... 2 3
    Replies:
    39
    Views:
    16,079
    Leo Lazauskas
    Dec 11, 2014
  26. pascal bertram

    propeller shaft bertram

    pascal bertram, Oct 26, 2009 ... 2 3
    Replies:
    39
    Views:
    14,201
    pascal bertram
    Apr 26, 2010
  27. sandhammaren05
    Locked

    Challenge to naval architects and marine engineers

    sandhammaren05, Feb 8, 2022 ... 2 3
    Replies:
    38
    Views:
    5,645
    sandhammaren05
    Feb 11, 2022
  28. BertKu

    A strange question

    BertKu, Dec 29, 2020 ... 2 3
    Replies:
    38
    Views:
    6,695
    gonzo
    Mar 23, 2021
  29. Sindel

    Shaft material opinions?

    Sindel, Aug 14, 2009 ... 2 3
    Replies:
    38
    Views:
    24,355
    Yellowjacket
    Aug 21, 2009
  30. Cajunpockettunnel

    Best prop for pocket tunnel

    Cajunpockettunnel, Aug 23, 2020 ... 2 3
    Replies:
    37
    Views:
    8,746
    Cajunpockettunnel
    Aug 29, 2020
  31. Three Ts

    Need to gain 2-3 knots

    Three Ts, Jul 31, 2014 ... 2 3
    Replies:
    37
    Views:
    7,928
    baeckmo
    Aug 14, 2014
  32. Noel McGettigan

    Thrust power

    Noel McGettigan, Dec 16, 2018 ... 2 3
    Replies:
    36
    Views:
    9,747
    Robert McFadden
    Mar 17, 2023
  33. Roflhat

    Modelling a propeller

    Roflhat, Sep 24, 2015 ... 2 3
    Replies:
    36
    Views:
    13,798
    Roflhat
    Mar 24, 2016
  34. Daan

    Left handed propeller

    Daan, Sep 20, 2020 ... 2 3
    Replies:
    34
    Views:
    7,017
    brendan gardam
    Dec 5, 2020
  35. 7228sedan

    Calulated propeller efficiency

    7228sedan, Nov 5, 2018 ... 2 3
    Replies:
    34
    Views:
    8,689
    7228sedan
    Nov 28, 2020
  36. solarguy

    High pitch trolling motor prop for solar boat

    solarguy, Oct 29, 2014 ... 2 3
    Replies:
    34
    Views:
    20,038
    solarguy
    Oct 31, 2014
  37. laurie dixon

    New Design Prop That Acts Like A Nozzle?

    laurie dixon, Apr 11, 2014 ... 2 3
    Replies:
    34
    Views:
    6,869
    laurie dixon
    Apr 13, 2014
  38. Sea Zar

    Prop Advice

    Sea Zar, Feb 13, 2006 ... 2 3
    Replies:
    33
    Views:
    8,674
    Jango
    Mar 30, 2006
  39. Starman

    Maximum efficiency prop for a WIG boat

    Starman, Jun 24, 2010 ... 2 3
    Replies:
    32
    Views:
    7,517
    Starman
    Jun 25, 2010
  40. DogCavalry

    A Picture is Worth a Thousand Words

    DogCavalry, Jun 30, 2021 ... 2 3
    Replies:
    31
    Views:
    5,564
    powerabout
    Aug 31, 2021
Showing threads 1 to 40 of 543

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