Prop RPM

Discussion in 'Propulsion' started by U.S.S. Arazona, Feb 23, 2014.

  1. U.S.S. Arazona

    U.S.S. Arazona Active Member

    Joined:
    Jul 2, 2010
    Posts:
    191
    How do you figure out what the prop rpm should be for different boats?
     
    U.S.S. Arazona, Feb 23, 2014
    #1
  2. SnipeHunter

    SnipeHunter Well-Known Member

    Joined:
    Aug 22, 2007
    Posts:
    1,359
    Realistically? Trial and error.

    It has to do with a lot more than just what boat your are running. Prop size/prop pitch/prop location/number of props/boat weight,etc...
     
    SnipeHunter, Feb 23, 2014
    #2
  3. Tugboat

    Tugboat Facilitator RCWC Staff Admiral (Supporter)

    Joined:
    Jan 10, 2007
    Posts:
    8,298
    Location:
    Statesboro, GA
    Like Darth Kessler says... I usually ask someone who is running that ship what they use, and start testing from that point.
     
    Tugboat, Mar 20, 2014
    #3
  4. U.S.S. Arazona

    U.S.S. Arazona Active Member

    Joined:
    Jul 2, 2010
    Posts:
    191
    I'll look at the Iowa and start from there, since there's very few Alsaces out there :)
     
    U.S.S. Arazona, Mar 23, 2014
    #4
  5. U.S.S. Arazona

    U.S.S. Arazona Active Member

    Joined:
    Jul 2, 2010
    Posts:
    191
    Internet lag
     
    U.S.S. Arazona, Mar 23, 2014
    #5
  6. U.S.S. Arazona

    U.S.S. Arazona Active Member

    Joined:
    Jul 2, 2010
    Posts:
    191
    Again :mad:
     
    U.S.S. Arazona, Mar 23, 2014
    #6
  7. crzyhawk

    crzyhawk Well-Known Member

    Joined:
    Feb 25, 2007
    Posts:
    2,306
    Location:
    Alexandria, VA
    This is the truth. A few years ago, I swapped out the 500's in my Invincible for 380s. Since I battle Treaty and we run at slower speeds I felt that the smaller motors would serve me better (and the 500's were in poor shape). I also had a busted blade on one of my props, so I put my old 26 second fast gun props back on, thinking that the extra prop area would help me.

    I ended up not being able to get up to speed, at all. the big props were too much for the smaller motors to drive. I swapped out the big props for a set of smaller props and now she runs beautifully again.
     
    crzyhawk, Apr 16, 2014
    #7