surface piercing propellers

Discussion in 'Boat Design' started by seyyed1349, Sep 11, 2002.

  1. seyyed1349
    Joined: Sep 2002
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    Location: iran

    seyyed1349 New Member

    How can build surface piercing propellers?Can use Nibral for this propellers?What standard suitable for this?
     
    seyyed1349, Sep 11, 2002
    #1
  2. RANCHI OTTO
    Joined: Apr 2005
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    RANCHI OTTO Naval Architect

    have a look on ROLLA PROPELLERS web site.
    He is the most popular and famous piercing propellers manufacturer.
     
    RANCHI OTTO, Jan 22, 2006
    #2
    1 person likes this.
  3. dougfrolich
    Joined: Nov 2002
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    dougfrolich Senior Member

    I am looking for reference material regarding methods for evaluating the vertical forces generated by a surface piercing propeller by various combinations of Pitch,Rake,Skew,blade and hub design. Is there any openly published material? Thanks.
     
    dougfrolich, Jan 22, 2006
    #3
  4. RANCHI OTTO
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    RANCHI OTTO Naval Architect

    So detailed open water tests, I don't have never see.

    I think that one of the problems is that the thrust direction has the possibility to be modified.

    I had a Dos program from Arneson that permit to calculate the resistance and the propulsion (optimization of prop. geometry) of high speed boats.

    The name of the program was AMI.BOAT that permits to calculate D, P/D, n, Eta0... try asking Arneson..

    Some material has been published from Rolla , ask directly using e-mail in web
     
    RANCHI OTTO, Jan 22, 2006
    #4
  5. dougfrolich
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    dougfrolich Senior Member

    Thanks Otto, I'll do that.
     
    dougfrolich, Jan 22, 2006
    #5
  6. RANCHI OTTO
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    RANCHI OTTO Naval Architect

    We are both graduated from the Westlawn......
     
    RANCHI OTTO, Jan 22, 2006
    #6
  7. dougfrolich
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    dougfrolich Senior Member

    Yes we are!! I am very impressed with your work! it looks very exciting.
     
    dougfrolich, Jan 22, 2006
    #7
  8. RANCHI OTTO
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    RANCHI OTTO Naval Architect

    Yes, it is..
    Thank you...
    Exiting is to give garantee for speed for military boats...
    All designs btw. 40 and 50 knots...
    Penalty if you reach 1/2 knot less and with 2 knots they refuse the boats!!!
    This means that the shipyard is out...

    Exiting...yes !
     
    RANCHI OTTO, Jan 23, 2006
    #8
  9. Jeff
    Joined: Jun 2001
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    Jeff Moderator

    A newer version of Paul Kamen's original?
    http://www.well.com/user/pk/SPApower.html
     
    Jeff, Jan 23, 2006
    #9
  10. RANCHI OTTO
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    RANCHI OTTO Naval Architect

    Eureka ! It's the same..bravo Jeff!!
     
    RANCHI OTTO, Jan 23, 2006
    #10
  11. dougfrolich
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    dougfrolich Senior Member

    Thanks guys!!
     
    dougfrolich, Jan 23, 2006
    #11
  12. RANCHI OTTO
    Joined: Apr 2005
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    RANCHI OTTO Naval Architect

    With this program you have the possibility to calculate your curve of piercing screw r.p.m. plotting, once D, P/D, z choosen, using coeff KT/J^2.

    You have the possibility to construct open water curves using this wonderful program....
     
    RANCHI OTTO, Jan 23, 2006
    #12
  13. yipster
    Joined: Oct 2002
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    Location: netherlands

    yipster designer

    good info, thanks guys :cool:
     
    yipster, Jan 24, 2006
    #13
  14. Wellydeckhand

    Wellydeckhand Previous Member

    Thanks.... from my friend Sid Nixon.... he like it...:)
     
    Wellydeckhand, Feb 18, 2006
    #14

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