Motor yacht design

Discussion in 'Boat Design' started by heaci, Oct 27, 2012.

  1. sean9c
    Joined: Jan 2011
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    Location: Anacortes,WA

    sean9c Senior Member

    Hard to imagine the displacement of that boat you listed is anywhere near the 11000# stated in the listing. Realistically I'd think the displacement of a boat of those specs would be lucky to be 20000# lightly loaded
     
  2. heaci
    Joined: Oct 2012
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    Location: Turkey

    heaci Junior Member

  3. Willallison
    Joined: Oct 2001
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    Willallison Senior Member

    I don't mean to sound derogatory, but if you have been studying NA for 3 years and you don't have a clue on where to start, then I'm afraid I don't think too much of the course you are doing!

    As to the displacement of the vessel, I don't think 5900kg is particularly lightweight. In fact, I'd consider it a bit of a lard-arse. If you can't design a custom build that weighs less than a production boat that is built to a price, then there's something wrong. My own boat, Graphite ( pictured below ) is a somewhat smaller boat than the Searay which is referred to with a beam 2.8m, but it is 10m long and weighs less than 3000kg dry. I paid careful attention to the weight, but she is by no means lightly built.

    She does 32 knots (lightship) with a single 260hp Yanmar / Bravo 3 by the way....
     

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  4. heaci
    Joined: Oct 2012
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    heaci Junior Member

    So what now ? I spent 3 years and dont know where to start, should I cry like a baby or try to learn how to figure out ? I hope after this talk , it will be only for help, help me if you believe you can.

    A simple question and it is ' after main dimensions , should I desing the hull on maxsurf or before desiginig hull , should I need to arrange the pre settlement ?
     
  5. sean9c
    Joined: Jan 2011
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    sean9c Senior Member

    In all honesty you can't just post 'how do I design a 10M MY?' and expect to get much of a response. A few of the logical steps, and ones that you'd think 3 yrs of NA education would have taught you, would be to figure out some design parameters, like (in no specific order)
    * Offshore or coastal capability
    * How fast do I want to go
    * What range do I want
    * Diesel or gas
    * How much interior do I need
    * How hi tech do I want to get in construction (or construction method)
    * Custom or production
    * If it's a production boat what does my target market expect
    * Given my target market are there design limitations

    Until you establish some design parameters it's impossible to even get started
     
  6. heaci
    Joined: Oct 2012
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    heaci Junior Member

    Actually you are totally right , and I will try to decide on them, after that I will ask more specific question. Thank u buddy
     
  7. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    We are not trying to give you a hard time. To get proper answers, you need to ask proper questions. all this feedback it narrowing the question so you will end up with something relevant. Good luck with your profession.
     
  8. Willallison
    Joined: Oct 2001
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    Location: Australia

    Willallison Senior Member

    As Gonzo says, we aren't trying to give you a hard time... just trying to establish what it is you are actually hoping to achieve. As others have already stated, the SOR (statement of requirements, or mission statement) is the fundamental building block of any and every design. Until you have it clearly laid out then you have no hope of producing anything approaching a sensible design - and if you don't have it laid out, how can you expect us to know?

    And frankly, if I had studied for 3 years and didn't know where to start I might just have a little cry!!

    There are a nhumber of published texts on 'how to design a boat'. I suggest you get hold of one and try to fill in the gaps of what is obviously a very defficient design course
     
  9. Ad Hoc
    Joined: Oct 2008
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    Location: Japan

    Ad Hoc Naval Architect

    You simply lack the "application".

    Your degree (if that is what you have been doing for 3 years) is simply your foundation. It only provides you with the basic tools and means of analysis. It does not make you automatically a NA/Designer.

    Thus to properly answer your question, assuming you wish to be a NA as a career, is to get a job in a design office/company. There you will be shown how to apply the theory you have learnt. It is not a 5min job..there are many aspects to learn. A good mentor would be the way to go.

    It is no different from a student who has passed their exams to become a doctor, medical doctor that is. Once they pass, they still must go through the learning process of understanding what the theory means in practice, and like a NA, takes many years.

    You have a long but exciting road ahead. What you require now, is patience.
     
  10. tunnels

    tunnels Previous Member

  11. Willallison
    Joined: Oct 2001
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    Location: Australia

    Willallison Senior Member

    Are they building those Mustang's under license for the local economy or are they exporting them under the Mustang brand to other parts of the world?
     
  12. tunnels

    tunnels Previous Member

    EX Mustang !

    Used to be Mustang !! is now Seama has been for a couple of years Have boats for the local market and for export ,CANADA !!
     
  13. Willallison
    Joined: Oct 2001
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    Location: Australia

    Willallison Senior Member

    Ah...yes, of course... silly me - had forgetten about the demise of Mustang...
    If they still have money in the bank there may be a couple more brands they could pick up before too long...:(
     
  14. WestVanHan
    Joined: Aug 2009
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    Location: Vancouver

    WestVanHan Not a Senior Member

    An acqauintance was looking at a couple of those,he listened to my advice and didn't buy them.
     

  15. tunnels

    tunnels Previous Member

    Made in CHINA !! used to be made in Japan once ! but that changed !!

    Before you let your old predudices get the better of you think before you speak !!
    You need to see what happening in the world !! its changing at a very fast pace
    This is me talking and i am nothing to do with sales !
    When i came to this company i was asked as a outsider all about what people are looking for !! My answer was MADE IN CHINA is the biggest hurdle you will ever have to jump over !! its a changing world .It used to be made in Japan !!Now where can you buy anything that hasnt got japanese in it! on it !or completely made in Japan .take a look at everything you use its got Japanese something in it !!
    Trouble now is japanese is now manufactured in China !! so something else to think about !
    These boats are well built and electrics and engines and engineering is A1!!most motors are Cummins with Mercruiser stern drives !!where do they come from and what have they got in them ??
    The hulls and decks are thicker than the Australian boats ever were !! ,glassing is 99% and has VE resin in the first layers of the hull !! the hulls have two barrior coats of epoxy and two coats antifouling rolled on ! . The timber its all genuine teak thats used through out because the logs come to the factory slit into 60 mm thick planks and we do all the machining our selves .
    All and any plyword used during the construction is as good as if not better than you will find in any country where boats are manufactured !!
    All our young (and a few older ones) wooden boat builders we have in this company i would stack up against any tradesmen i worked with in any country anywhere .
    Its part of my job to walk take pictures and in general check whats going on every where , I dont see all but there not much that i dont see so !!
    Things you find in shops with made in china you cant find here . the chinese wont touch any thing like it its junk It what your importers are shipping and you are buying !! Yes there is cheap good but you get what you pay for !! you are not forced to buy it its your choice !! There some terrible made in USA product on the shelves in differant coutries as well !! think a little !! :mad:
     
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