hello,we have a problem in stepped planning craft

Discussion in 'Boat Design' started by jimhongfei, Jun 2, 2013.

  1. jimhongfei
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    jimhongfei Junior Member

    yes. they have no problem when it drives slowly(0-20kn).but when it drives Speed to full 。the engine‘s rotate is 2000-3000RPM. the boat will go wrong
     
  2. Mr Efficiency
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    Mr Efficiency Senior Member

    Important point, is there any feedback in the steering ?
     
  3. jimhongfei
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    jimhongfei Junior Member


    thank you, but why there is no problem when it drives slowly. i don't understand. also i have Met another case. they have the same problem.they use integrated fixed surface drive system .
     
  4. jimhongfei
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    jimhongfei Junior Member

    sorry for my poor english again. "feedback in the steering"means?
     
  5. Mr Efficiency
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    Mr Efficiency Senior Member

    I am not clear on what the exact "problem" is. Describe it in more detail.
     
  6. Mr Efficiency
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    Mr Efficiency Senior Member

    On standard steering systems, the feedback from the engine can make the steering wheel turn involuntarily while under power. In zero-feedback systems, the wheel will stay where you turned it if you lift you hands off it.
     
  7. jimhongfei
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    jimhongfei Junior Member

    they have no problem when it drives slowly(0-20kn).but when it drives Speed to full 。the engine‘s rotate is 2000-3000RPM.
    on completely flat water, at speed, it does what, pull to one side
     
  8. Mr Efficiency
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    Mr Efficiency Senior Member

    Pulls to one side, which way, left or right ?
     
  9. jimhongfei
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    jimhongfei Junior Member

    i think the feedback is"hydraulic steering gear". we have it
     
  10. jimhongfei
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    jimhongfei Junior Member

    it rocks disorder. the course instability .
     
  11. Mr Efficiency
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    Mr Efficiency Senior Member

    I am getting confused, my head is starting to hurt.
     
  12. jimhongfei
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    jimhongfei Junior Member

    sorry,you need have a rest for my english.
     
  13. daiquiri
    Joined: May 2004
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    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    Hi Jimhongfei,
    Let's talk through images, because we have a language barrier here. ;)
    This is chine-walking: http://youtu.be/5VhTWvkqQK8 (check what happens at 1:30 and 2:30 in the video).
    This is chine-walk seen from outside: http://youtu.be/3a_FondeUF4
    Is that what happens to your boat?
     
  14. jimhongfei
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    jimhongfei Junior Member

    it says what I mean
     

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  15. jimhongfei
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    jimhongfei Junior Member

    the first one
     
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