speed boat design

Discussion in 'Boat Design' started by tonipu, Jan 12, 2021.

  1. standman
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    standman Junior Member

    PM me so we don't make this post a mile long
     
  2. Mr Efficiency
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    Mr Efficiency Senior Member

    The wet ride I can believe, standman, whenever that plumb bow dips into waves, not something that would suit passengers in an open cockpit.
     
  3. standman
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    standman Junior Member

    It's not bad at all. Wind has to be strong and coming from 10 or 2 o'clock position.
    Uploaded video just now.
     
  4. TANSL
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    TANSL Senior Member

  5. tonipu
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    tonipu Junior Member



    towing froud number 1.25 = 25kts

    than last 30secondo towing froud 1.7= 35kts
     
  6. TANSL
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    TANSL Senior Member

  7. tonipu
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    tonipu Junior Member

    Probably
    Construction
     
  8. TANSL
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    TANSL Senior Member

  9. bajansailor
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    bajansailor Marine Surveyor

    Tonipu, if you do start to build your boat, please do keep this thread updated with your construction progress.
    And include lots of photos along the way!
     
  10. tonipu
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    tonipu Junior Member

    Yes i Will do, Thank you all for your advice, i Will do first another towing probe with 1:20 model towing, slightly modified bow
     
  11. TANSL
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    TANSL Senior Member

    But what are the results of all the towing tests you are doing? Could we see them and analyze the results with you and, if possible, also learn from those tests?. Because, frankly, the videos indicate very little, or do they?
     
  12. tonipu
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    tonipu Junior Member

    Ok, i Will do more result from this latest test, i Will mesure the towing force. I only look sea keeping ability, as i can see looks good, and i look How is the trim, and trim looks like im savitsky prediction
     
  13. TANSL
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    TANSL Senior Member

    What is the point you use to "push" the boat? Is the "arm" that pushes the boat stiff? How have you ensured that the towing conditions are the same in all the tests?
    Regarding trim, what device do you use to measure it? The "naked eye" assessment cannot be rigorous. The conditions of the towing boat, were they the same in all cases? There are many questions that would like to know so that we can discuss the results with you and give them reliability or not.
     
  14. tonipu
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    tonipu Junior Member

    Latest model made 1:20
     

    Attached Files:


  15. tonipu
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    tonipu Junior Member

    What is the point you use to "push" the boat? Is the "arm" that pushes the boat stiff?
    the point i push the boat i think i mathed the shaft vector intersecting with cog

    the arm is not stiff it is of nylon
     
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