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:
    65,929
    TeddyDiver
    Oct 12, 2012
  2. missinginaction

    The mystery of a proper prop and terrible performance

    missinginaction, Jan 25, 2020 ... 11 12 13
    Replies:
    180
    Views:
    23,893
    Nidza
    Jul 30, 2023
  3. Asleep Helmsman

    Power Required

    Asleep Helmsman, Jan 5, 2010 ... 7 8 9
    Replies:
    133
    Views:
    19,165
    Joakim
    Feb 28, 2010
  4. tom kane

    How do propellers propell a boat.

    tom kane, Mar 12, 2015 ... 7 8 9
    Replies:
    126
    Views:
    22,185
    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:
    17,716
    tugboat
    Mar 10, 2012
  6. BertKu

    Turning Clock or anti clock wise

    BertKu, Dec 28, 2012 ... 4 5 6
    Replies:
    78
    Views:
    15,852
    BertKu
    Mar 4, 2013
  7. Sindel

    a prop's rake

    Sindel, Aug 7, 2009 ... 4 5 6
    Replies:
    75
    Views:
    16,948
    Sindel
    Aug 17, 2009
  8. Duco84

    Propeller size

    Duco84, May 26, 2015 ... 3 4 5
    Replies:
    70
    Views:
    16,300
    Duco84
    Aug 7, 2015
  9. michaeljc

    Prop tip velocity

    michaeljc, Jun 10, 2013 ... 3 4 5
    Replies:
    62
    Views:
    15,036
    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:
    12,439
    FAST FRED
    Oct 3, 2012
  11. bblagonic

    prop doing bad

    bblagonic, Oct 24, 2009 ... 3 4 5
    Replies:
    62
    Views:
    16,835
    Joakim
    Jan 27, 2010
  12. DogCavalry

    Oversized prop compromise

    DogCavalry, Sep 24, 2020 ... 2 3 4
    Replies:
    54
    Views:
    7,064
    DogCavalry
    Feb 12, 2021
  13. cmaas

    Electric hydrofoil prop

    cmaas, Sep 8, 2020 ... 2 3 4
    Replies:
    53
    Views:
    8,187
    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:
    6,680
    powerabout
    Dec 18, 2012
  15. sailor0000

    Propeller calculations - HELP!

    sailor0000, Dec 27, 2012 ... 2 3 4
    Replies:
    48
    Views:
    13,303
    JSL
    Jan 11, 2013
  16. Per S

    Speed/slip problem

    Per S, Jan 4, 2005 ... 2 3
    Replies:
    43
    Views:
    14,869
    ljwhisenant
    Jul 17, 2005
  17. BlueBell

    What R/C Props to Try?

    BlueBell, Nov 19, 2017 ... 2 3
    Replies:
    42
    Views:
    5,336
    BlueBell
    Dec 19, 2017
  18. Tiny Turnip

    Propellor for pedal powered catamaran

    Tiny Turnip, Mar 31, 2008 ... 2 3
    Replies:
    41
    Views:
    53,803
    jit89
    Jun 17, 2019
  19. kistinie

    Controllable Pitch Propeller for lower power & electric motors

    kistinie, Jan 2, 2010 ... 2 3
    Replies:
    41
    Views:
    16,254
    powerabout
    Jul 9, 2010
  20. hwsiii

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

    hwsiii, Jan 23, 2010 ... 2 3
    Replies:
    40
    Views:
    9,827
    powerabout
    May 31, 2010
  21. FAST FRED

    Variable DIAMETER ? Prop

    FAST FRED, Mar 2, 2010 ... 2 3
    Replies:
    40
    Views:
    7,342
    TeddyDiver
    Apr 5, 2010
  22. Slowboating

    Outboard prop modifications

    Slowboating, Oct 22, 2021 ... 2 3
    Replies:
    39
    Views:
    3,538
    johneck
    Nov 30, 2021
  23. sottorf

    Strange Propeller

    sottorf, Sep 17, 2012 ... 2 3
    Replies:
    39
    Views:
    14,589
    Leo Lazauskas
    Dec 11, 2014
  24. pascal bertram

    propeller shaft bertram

    pascal bertram, Oct 26, 2009 ... 2 3
    Replies:
    39
    Views:
    12,858
    pascal bertram
    Apr 26, 2010
  25. sandhammaren05
    Locked

    Challenge to naval architects and marine engineers

    sandhammaren05, Feb 8, 2022 ... 2 3
    Replies:
    38
    Views:
    3,631
    sandhammaren05
    Feb 11, 2022
  26. BertKu

    A strange question

    BertKu, Dec 29, 2020 ... 2 3
    Replies:
    38
    Views:
    5,139
    gonzo
    Mar 23, 2021
  27. Sindel

    Shaft material opinions?

    Sindel, Aug 14, 2009 ... 2 3
    Replies:
    38
    Views:
    21,868
    Yellowjacket
    Aug 21, 2009
  28. Cajunpockettunnel

    Best prop for pocket tunnel

    Cajunpockettunnel, Aug 23, 2020 ... 2 3
    Replies:
    37
    Views:
    6,701
    Cajunpockettunnel
    Aug 29, 2020
  29. Three Ts

    Need to gain 2-3 knots

    Three Ts, Jul 31, 2014 ... 2 3
    Replies:
    37
    Views:
    6,425
    baeckmo
    Aug 14, 2014
  30. Noel McGettigan

    Thrust power

    Noel McGettigan, Dec 16, 2018 ... 2 3
    Replies:
    36
    Views:
    7,022
    Robert McFadden
    Mar 17, 2023
  31. Roflhat

    Modelling a propeller

    Roflhat, Sep 24, 2015 ... 2 3
    Replies:
    36
    Views:
    11,545
    Roflhat
    Mar 24, 2016
  32. Daan

    Left handed propeller

    Daan, Sep 20, 2020 ... 2 3
    Replies:
    34
    Views:
    5,266
    brendan gardam
    Dec 5, 2020
  33. 7228sedan

    Calulated propeller efficiency

    7228sedan, Nov 5, 2018 ... 2 3
    Replies:
    34
    Views:
    6,615
    7228sedan
    Nov 28, 2020
  34. solarguy

    High pitch trolling motor prop for solar boat

    solarguy, Oct 29, 2014 ... 2 3
    Replies:
    34
    Views:
    18,046
    solarguy
    Oct 31, 2014
  35. laurie dixon

    New Design Prop That Acts Like A Nozzle?

    laurie dixon, Apr 11, 2014 ... 2 3
    Replies:
    34
    Views:
    5,725
    laurie dixon
    Apr 13, 2014
  36. Sea Zar

    Prop Advice

    Sea Zar, Feb 13, 2006 ... 2 3
    Replies:
    33
    Views:
    7,587
    Jango
    Mar 30, 2006
  37. Starman

    Maximum efficiency prop for a WIG boat

    Starman, Jun 24, 2010 ... 2 3
    Replies:
    32
    Views:
    6,368
    Starman
    Jun 25, 2010
  38. DogCavalry

    A Picture is Worth a Thousand Words

    DogCavalry, Jun 30, 2021 ... 2 3
    Replies:
    31
    Views:
    4,065
    powerabout
    Aug 31, 2021
  39. alby joy

    3 bladed propeller vs 4 bladed propeller

    alby joy, Apr 18, 2019 ... 2 3
    Replies:
    31
    Views:
    5,013
    powerabout
    Dec 14, 2019
  40. cmaas

    Prop selection question for 6m foil assisted power cat

    cmaas, Dec 15, 2023 ... 2
    Replies:
    29
    Views:
    1,445
    cmaas
    Dec 18, 2023
Showing threads 1 to 40 of 536

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