Propeller Selection

Discussion in 'All Things Boats & Boating' started by hasani, Apr 18, 2008.

  1. hasani
    Joined: Oct 2007
    Posts: 8
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    Location: ir

    hasani Junior Member

    I want to choose a propeller for a tug with the following particulars:
    Main engine power(single screw): 3300bhp
    RPM: 600
    Gearing rate 1:2
    which want to tug a 5000 tonne weight in 6 knot speed. and does not have kort nozzle.
    please inform me about the specifications of the best propeller which can satisfy my needs. i want to know the type, No. of the blades, and the diameter of the propeller.
    Tnx
     
  2. Guest625101138

    Guest625101138 Previous Member

    How many threads are you going to create for the same question? it makes it extremely confusing for people who respond to follow other responses?

    Rick W.
     
  3. safewalrus
    Joined: Feb 2005
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    Location: Cornwall, England

    safewalrus Ancient Marriner

    With all these threads maybe he can knit himself one?
     
  4. artemis
    Joined: Oct 2004
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    Location: USA

    artemis Steamboater

    Visit the website of one of the many propeller manufacturers (google the name), fill out their form and email it. You'll get an answerback in a day or two.
     
  5. safewalrus
    Joined: Feb 2005
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    Location: Cornwall, England

    safewalrus Ancient Marriner

    Sound advice there artemis - for all of us:D :D

    read it as you may, I know art will read it the way it is intended!
     
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  6. artemis
    Joined: Oct 2004
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    Location: USA

    artemis Steamboater

    Thank 'ee kindly Walrus. I've left a little tip for 'ee :D
     
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  7. Sean Herron
    Joined: May 2004
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    Location: Richmond, BC, CA.

    Sean Herron Senior Member

    Hello...

    Hello...

    See attached - if it works...

    You first need to determine your shaft diameter - bearing spacing if more than one in the log - and your available hull clearance - need 15 to 20 percent of wheel diameter so as to not cavitate at the top of the swing ...

    Here is a good site - an old friend even - see http://www.bertram31.com/proj/tips/shafts.htm ...

    That gets you started - as for material and section thicknesses for a tow application - talk to a good maker that have their own foundry and machine facilities - like http://www.osbornepropellers.com/Consulting.htm ...

    These guys have been casting and milling their own product since the 1930's...

    All pretty basic stuff - from this point it can get crazy...:)

    SH.
     

    Attached Files:

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