Prop pitch & diameter

Discussion in 'Outboards' started by mikey483, Apr 21, 2007.

  1. mikey483
    Joined: Feb 2007
    Posts: 3
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: San Francisco,ca

    mikey483 New Member

    Looking for advise on best prop pitch and diameter for rib with following specs:

    27 foot rigid inflatable boat
    deadrise at transon 16 degrees, midship is 24 degrees
    power is twin evinrude 150 hp outboards
    total weight with 50 gallon fuel tank is 1,950 lbs.
    Use is open ocean

    Thanks,
    Mike stack
     
    mikey483, Apr 21, 2007
    #1
  2. Jango
    Joined: Aug 2005
    Posts: 519
    Likes: 7, Points: 0, Legacy Rep: 63
    Location: Mid Atlantic

    Jango Senior Enthusiast

    What are the gear ratios and also max rated RPM of the motors? Also,Is the 1950 lb Displacement, total, with one passenger and minimal fuel ?
     
    Jango, Apr 21, 2007
    #2
  3. ted655
    Joined: May 2003
    Posts: 640
    Likes: 14, Points: 0, Legacy Rep: 122
    Location: Butte La Rose, LA.

    ted655 Senior Member

    :confused: Is this boat running now or in planning stage? WOT RPMs "now" will be big factor in prop selection.
    An educated guess says a 13 X21 is in the neighborhood.
     
    ted655, Apr 25, 2007
    #3
Loading...
Similar Threads
  1. valvebounce

    Will my prop be over pitched?

    valvebounce, Oct 19, 2022, in forum: Outboards
    Replies:
    6
    Views:
    1,070
    valvebounce
    Oct 21, 2022
  2. byob1985

    Prop Pitch on 50HP Johnson 21ft Carolina Skiff

    byob1985, Mar 13, 2014, in forum: Outboards
    Replies:
    5
    Views:
    3,538
    boatbuilder41
    May 7, 2014
  3. DogCavalry

    Prop hub matched to gearbox

    DogCavalry, Sep 24, 2022, in forum: Outboards
    Replies:
    5
    Views:
    1,066
    powerabout
    Dec 16, 2022
  4. Joseph Banta

    Sukuki single vs duo prop

    Joseph Banta, Feb 15, 2021, in forum: Outboards
    Replies:
    14
    Views:
    4,404
    Boat Design Net Moderator
    Feb 19, 2021
  5. Vronsky

    Prop size and factory spec.

    Vronsky, Oct 26, 2019, in forum: Outboards
    Replies:
    18
    Views:
    2,818
    Yellowjacket
    Oct 28, 2019
  6. gcarmich

    Max Outboard Exhaust Temperature passing thru hub of prop

    gcarmich, Jan 9, 2018, in forum: Outboards
    Replies:
    2
    Views:
    2,998
    PAR
    Jan 14, 2018
  7. Fishahollik

    Prop or gear issue?

    Fishahollik, Jul 23, 2017, in forum: Outboards
    Replies:
    3
    Views:
    1,676
    Mr Efficiency
    Jul 23, 2017
  8. valvebounce

    Prop pinion shaft seal

    valvebounce, Dec 27, 2015, in forum: Outboards
    Replies:
    12
    Views:
    2,403
    powerabout
    Dec 29, 2015
  9. valvebounce

    patching an aluminium prop

    valvebounce, Oct 14, 2015, in forum: Outboards
    Replies:
    4
    Views:
    2,057
    valvebounce
    Oct 14, 2015
  10. valvebounce

    7.5 hp 2 stroke prop evinrude.

    valvebounce, Dec 12, 2014, in forum: Outboards
    Replies:
    2
    Views:
    2,228
    valvebounce
    Dec 13, 2014
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.