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. takoateli

    Prop Thrust Calculation

    takoateli, May 31, 2011 ... 2
    Replies:
    25
    Views:
    69,883
    Mick@itc
    Apr 8, 2012
  3. 67-LS1

    Prop size calculator

    67-LS1, Jul 22, 2004
    Replies:
    13
    Views:
    69,817
    yipster
    Mar 5, 2005
  4. Tiny Turnip

    Propellor for pedal powered catamaran

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

    Propeller Speed Theory

    batboat, Sep 25, 2005
    Replies:
    9
    Views:
    47,464
    mydauphin
    May 23, 2009
  6. Diamond Cutter

    Is there a simple relationship between prop rpm and boat speed?

    Diamond Cutter, Jan 12, 2012 ... 2
    Replies:
    18
    Views:
    32,983
    johneck
    Feb 24, 2012
  7. 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
  8. mcl

    Propeller testing and reviews mercury vs solas

    mcl, Sep 7, 2018
    Replies:
    0
    Views:
    29,811
    mcl
    Sep 7, 2018
  9. 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
  10. jav

    Inboard Propeller sizing / theory ??

    jav, Nov 8, 2004 ... 2
    Replies:
    22
    Views:
    25,390
    Richard Petersen
    Dec 10, 2004
  11. Sindel

    Shaft material opinions?

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

    Variable pitch props. Worth it on small boat?

    DennisRB, Nov 30, 2010 ... 2
    Replies:
    17
    Views:
    22,935
    TeddyDiver
    Dec 5, 2010
  13. Asleep Helmsman

    Power Required

    Asleep Helmsman, Jan 5, 2010 ... 7 8 9
    Replies:
    133
    Views:
    22,460
    Joakim
    Feb 28, 2010
  14. stratus5

    Diameter Vs Rpm for the new guy

    stratus5, Sep 17, 2005
    Replies:
    8
    Views:
    22,275
    Jango
    Sep 28, 2005
  15. joeforte

    Trolling motor powered surfboard: prop problems

    joeforte, Jul 23, 2007 ... 2
    Replies:
    25
    Views:
    21,011
    penguin78
    Apr 16, 2010
  16. amaurer

    trolling motor prop rpm?

    amaurer, Sep 27, 2009
    Replies:
    1
    Views:
    20,887
    portacruise
    Sep 28, 2009
  17. 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
  18. Spyderz

    Wageningen B-Series BP-Delta Diagrams Request

    Spyderz, Apr 6, 2011
    Replies:
    12
    Views:
    20,500
    plr
    Apr 30, 2024
  19. daiquiri

    Propeller performance vs. shaft inclination

    daiquiri, Dec 9, 2009
    Replies:
    10
    Views:
    20,256
    philSweet
    Jun 12, 2012
  20. solarguy

    High pitch trolling motor prop for solar boat

    solarguy, Oct 29, 2014 ... 2 3
    Replies:
    34
    Views:
    20,038
    solarguy
    Oct 31, 2014
  21. kengrome

    Controllable pitch propellers for small boats ...

    kengrome, Jun 8, 2007 ... 2
    Replies:
    17
    Views:
    19,682
    thudpucker
    Sep 19, 2007
  22. Sindel

    a prop's rake

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

    Prop tip velocity

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

    Dimensions of trolling motor prop

    terhohalme, Mar 18, 2017 ... 2
    Replies:
    16
    Views:
    18,909
    terhohalme
    Mar 24, 2017
  25. Duco84

    Propeller size

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

    prop doing bad

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

    B-Wageningen propeller diagrams

    zzerachiel, Jun 1, 2010 ... 2
    Replies:
    21
    Views:
    18,631
    pavel915
    Jun 9, 2010
  28. DennisRB

    Underwater thread sealant?

    DennisRB, Apr 23, 2013 ... 2
    Replies:
    15
    Views:
    18,583
    CDK
    Apr 24, 2013
  29. gyrojocky

    Surface Piercing Props

    gyrojocky, Sep 30, 2004 ... 2
    Replies:
    22
    Views:
    18,524
    tom kane
    Dec 10, 2004
  30. BertKu

    Turning Clock or anti clock wise

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

    gearbox ratio calculation

    enmico, Apr 10, 2013 ... 2
    Replies:
    18
    Views:
    17,807
    Adler
    May 7, 2021
  32. kistinie

    Controllable Pitch Propeller for lower power & electric motors

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

    propeller rotation

    abohamza, Oct 18, 2011
    Replies:
    14
    Views:
    16,912
    abohamza
    Oct 19, 2011
  34. TrustedShips

    Adding Kort nozzle to an existing propeller

    TrustedShips, Feb 6, 2012 ... 2
    Replies:
    16
    Views:
    16,739
    TrustedShips
    Feb 11, 2012
  35. Kvicken

    Diffuser ring experiment

    Kvicken, Oct 6, 2011 ... 2
    Replies:
    22
    Views:
    16,564
    Kvicken
    Oct 18, 2011
  36. Per S

    Speed/slip problem

    Per S, Jan 4, 2005 ... 2 3
    Replies:
    43
    Views:
    16,324
    ljwhisenant
    Jul 17, 2005
  37. Laranjo123

    Bp series propeller chart

    Laranjo123, Oct 21, 2011 ... 2
    Replies:
    15
    Views:
    16,222
    DCockey
    Dec 19, 2011
  38. sottorf

    Strange Propeller

    sottorf, Sep 17, 2012 ... 2 3
    Replies:
    39
    Views:
    16,079
    Leo Lazauskas
    Dec 11, 2014
  39. sailor0000

    Propeller calculations - HELP!

    sailor0000, Dec 27, 2012 ... 2 3 4
    Replies:
    48
    Views:
    15,570
    JSL
    Jan 11, 2013
  40. 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
Showing threads 1 to 40 of 543

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