Max pitch size ?

Discussion in 'Props' started by Vronsky, Oct 18, 2023.

Tags:
  1. Vronsky
    Joined: Apr 2014
    Posts: 68
    Likes: 2, Points: 8, Legacy Rep: 10
    Location: Amsterdam

    Vronsky Junior Member

    Hi,
    The factory specification concerning the WOT of my Suzuki DF115A is ranged 5000-6000 rpm (beyond 6000 rpm the rev. limiter is automatically triggered).

    Does this mean I can safely choose any propellor pitch size as long as WOT remains in-between these rpm's, even WOT at 5000 rpm ??

    THANKS,
    V.
     
    Vronsky, Oct 18, 2023
    #1
  2. gonzo
    Joined: Aug 2002
    Posts: 16,995
    Likes: 1,819, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    That is correct
     
    gonzo, Oct 18, 2023
    #2
  3. jehardiman
    Joined: Aug 2004
    Posts: 3,879
    Likes: 1,243, Points: 113, Legacy Rep: 2040
    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    As gonzo said, yes, but remember that as you increase pitch you also increase torque, all else being equal. So you will also need to ensure that the engine will support the required torque for the new pitch.
     
    jehardiman, Oct 19, 2023
    #3

  5. Vronsky
    Joined: Apr 2014
    Posts: 68
    Likes: 2, Points: 8, Legacy Rep: 10
    Location: Amsterdam

    Vronsky Junior Member

    Thanks!
    I'm considering doing a long-distance trip with my deep-V hull boat at hull speed.
    I'm figuring that a prop at max pitch size will reduce rpm at this speed, increase mileage, and give less engine noise.
    Getting into -occasional- planing will take longer I expect.
     
    Vronsky, Oct 19, 2023
    #4
Loading...
Similar Threads
  1. Nicholas Castro

    What is the max RPM any propeller can spin before it becomes useless?

    Nicholas Castro, May 3, 2021, in forum: Props
    Replies:
    8
    Views:
    6,726
    DogCavalry
    May 6, 2021
  2. geoleo

    MAX Prop equivalency??

    geoleo, Feb 24, 2014, in forum: Props
    Replies:
    4
    Views:
    2,301
    FAST FRED
    Feb 25, 2014
  3. Bob Rosa

    Need help calculating what dia and pitch propeller to use?

    Bob Rosa, Jun 28, 2023, in forum: Props
    Replies:
    9
    Views:
    2,342
    Bob Rosa
    Jul 21, 2023
  4. gonzo

    Defining propeller pitch

    gonzo, Feb 12, 2022, in forum: Props
    Replies:
    29
    Views:
    4,946
    powerabout
    Feb 28, 2022
  5. Henry Swanepoel

    Propeller pitch on quad installations VS twins

    Henry Swanepoel, Jan 19, 2022, in forum: Props
    Replies:
    10
    Views:
    2,243
    DogCavalry
    Jan 31, 2022
  6. Solarboat

    Determine pitch along the length

    Solarboat, Jun 22, 2020, in forum: Props
    Replies:
    11
    Views:
    3,052
    BlueBell
    Aug 30, 2020
  7. Samuel Neves Jocas

    Doubt: 0.7R Pitch and Pitch/Diameter ratio

    Samuel Neves Jocas, Mar 12, 2020, in forum: Props
    Replies:
    17
    Views:
    8,196
    jehardiman
    Mar 20, 2020
  8. Annode

    Help me get my head around variable pitch prop propulsion design

    Annode, Mar 1, 2020, in forum: Props
    Replies:
    15
    Views:
    3,705
    bajansailor
    Mar 6, 2020
  9. Magnus W

    Controllable pitch prop, effective range

    Magnus W, Aug 30, 2019, in forum: Props
    Replies:
    28
    Views:
    7,158
    aktxyz
    Mar 18, 2022
  10. StianM

    Fixed pitch tug boat props

    StianM, May 13, 2018, in forum: Props
    Replies:
    7
    Views:
    2,931
    Magnus W
    May 22, 2018
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.