required engine power for displacement/ semi displacement and planing boats

Discussion in 'Boat Design' started by M.Raven, May 27, 2015.

  1. M.Raven
    Joined: May 2015
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    Location: Netherlands

    M.Raven New Member

    Hello.

    I am looking for a tool(s) that could be able to predict the required engine power for displacement/ semi displacement and planing boats?
    I have seen spreadsheet for planning boats from Dingo. But I can imagine it is only valid for planning boats.
    Could you please help me regarding this?
    I also have no access to this paper `The Prediction of Power Performance on Planing Craft` by Hadler. Does anybody could provide it to me?
    Thanks in advance!

    Cheers,

    email
    Ravanan.mahmoud@gmail.com
     
  2. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    This is an old time nomogram that works well:
     

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  3. nzboy
    Joined: Apr 2011
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    nzboy Senior Member

    prop calculator

    http://www.vicprop.com/calculator.htm
    this prop calculator might be of a help you will have to copy link as I cant get it to go live
     
    Last edited: May 28, 2015
  4. baeckmo
    Joined: Jun 2009
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    baeckmo Hydrodynamics

    Thanx for the interesting nomogram, Gonzo. Where/what is the source?
     
  5. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    I copied it years ago from "The boat data book" by Nicholson
     
  6. M.Raven
    Joined: May 2015
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    M.Raven New Member

    Displacement hull

    Gonzo ,
    Thank you so much for your help.
    Do you have a spreadsheet (or any other useful tool) for displacement hull that I could you it to check my result with that?
    I used this graph and also the excel sheet of Dingo but it is not accurate.

    Thank you.
    Cheers
     

  7. YotaTruck
    Joined: Jun 2013
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    YotaTruck Junior Member

    I have been using these calculations to play around with a boat I drew up recently. It is a planing hull, but there are displacement and semi-displacement calculations in here as well:

    http://www.westlawn.edu/news/WestlawnMasthead06_June08.pdf

    I was actually just going to start another thread on this when I saw your post. I'll still do a separate one so as not to confuse the discussions.
     
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