Delft Systematic Deadrise Series

Discussion in 'Hydrodynamics and Aerodynamics' started by Windvang, Oct 6, 2017.

  1. Windvang
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    Windvang Yacht Designer

    schakel likes this.
  2. Angélique
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    Angélique aka Angel (only by name)

    The above link gives me this page . . .​

    _tu_delft_login_screenshot_.jpg
     
  3. Windvang
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    Windvang Yacht Designer

    Yes, you need to request a user acount.
     
  4. Angélique
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    Angélique aka Angel (only by name)

    OK, thanks . . :)
     
  5. DCockey
    Joined: Oct 2009
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    DCockey Senior Member

    Thanks for the link. I set up a user account and downloaded the Deadrise Series hull geometries in Rhino format (other formats are available) and complete measurement data.
     
  6. Windvang
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    Windvang Yacht Designer

    Do not forget the Papers in the library tab, those will explain a lot.
     
  7. bit
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    bit Student

    Thanks. Are there B11 and B12 missing?
     
  8. Windvang
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    Windvang Yacht Designer

    What do you mean by B11 and B12?
     
  9. bit
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    bit Student

    These two. Thanks.
     

    Attached Files:

  10. Windvang
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    Windvang Yacht Designer

    I did not have a good look myself yet, where are they expected to be?
    I will ask for you.
     
  11. bit
    Joined: Feb 2008
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    bit Student

    Excel:
    FAST 2017 Coeff DSDS twist dRtDepl
    FAST 2017 Coeff DSDS torsione dTheta
    FAST 2017 Coeff DSDS torsione dZNabla
     
  12. Windvang
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    Windvang Yacht Designer

    I have contacted them and it will be fixed a.s.a.p. thank you for reporting it.
    If you send me a mail I can send them to you directly.
     
  13. HJS
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    HJS Member

    I have downloaded and implemented DSDS in my own spreadsheets and tested it with some of my boats. It seems to be a very reliable tool for calculating the performance of my boats over a very large speed range. Thank you for all the information.

    JS
     
  14. schakel
    Joined: Jul 2008
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    schakel environmental project Msc

    Well I downloaded the whole database and found the hulls tested not so modern.
    Test results are fine, and looks very accurate. Well done.
    Thanks for the link. I can do the same as HJS and make the same calculations on the hulls as proposed by Verdier for the 36th cup. There is only one problem ..
    No-one, except for the Verdier design group, knows how the hulls and appendages will look like.
    I heard the hull looked something like this.
    Source (In dutch):
    Emirates Team New Zealand bevestigt foiling monohull tijdens 36ste America’s Cup | ClubRacer https://www.clubracer.be/2017/9/11/emirates-team-new-zealand-bevestigt-foiling-monohull-tijdens-36ste-americas-cup
    20170910-foiling-monohull.jpg
     

    Attached Files:


  15. HJS
    Joined: Nov 2008
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    HJS Member

    Schakel

    DSDS is not applicable to the Verdier boat you refer to. DSDS only fit V-bottom boats. I have now investigated a number of boats and the results are very satisfactory, both calculated and measured. So I can only recommend using DSDS within the limits it is intended for. Your claim that it fits only "not so modern boats" is completely misleading.

    JS
     
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