40ft Concept Design

Discussion in 'Boat Design' started by monrosm@shrewsb, Jul 23, 2010.

?

Design Quality

Poll closed Aug 12, 2010.
  1. Excellent

    1 vote(s)
    4.8%
  2. Good

    3 vote(s)
    14.3%
  3. Average

    6 vote(s)
    28.6%
  4. Poor

    8 vote(s)
    38.1%
  5. Unworthy

    3 vote(s)
    14.3%
  1. monrosm@shrewsb
    Joined: Apr 2006
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    Location: England

    monrosm@shrewsb Junior Member

    I am in the process of creating a 40ft concept Speed boat, im ok with the design side but would welcome some help and comments as to what the stability and seaworthiness would be like on such a design.
    Any comments are helpful, flaws in the design, pointers, praise and criticism!

    Picture attached!


    Thank you

    Stef
     

    Attached Files:

  2. daiquiri
    Joined: May 2004
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    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    Hello,
    We can't see the hull in that pic.
    From what can be seen, there is no way for the crew to access the foredeck area. If it is a fast (planing) craft, and agressive styling calls for that, then the transom is too narrow.
    From the aesthetic point of view, it looks appealing to me. It is ok as a starting point, keep improving it. ;)
     
  3. kach22i
    Joined: Feb 2005
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    Location: Michigan

    kach22i Architect

    Pretty picture, and as something to express an idea it works. However as something to explain a functioning craft it falls way short. Daiquiri's comments are spot on as they deal with this aspect.

    In your mind you have to live and work on the boat, doing the things humans do and what will be expected of the craft.

    The boat will dock, the humans will sleep.

    The boat will need to fuel up, the humans will need to eat.

    Simple things cannot be overlooked.

    About the tail taper, have you seen this?

    http://www.adriaticmarine.no/marex/21-duckie/
    [​IMG]

    Another thread you may want to read: (2 pages)
    http://www.boatdesign.net/forums/open-discussion/new-designer-board-32194.html

    Video of 21 Duckie:
    http://www.marex.no/index_engels.html#/home/
     
  4. daiquiri
    Joined: May 2004
    Posts: 5,372
    Likes: 239, Points: 73, Legacy Rep: 3380
    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

  5. sorenfdk
    Joined: Feb 2002
    Posts: 511
    Likes: 27, Points: 28, Legacy Rep: 394
    Location: Denmark

    sorenfdk Yacht Designer

    Stability and seaworthiness are very important parts of the design. You have made a very nice drawing of a very good looking yacht, but you haven't designed it yet!

    If you want us to comment on the design, you'll have to show us some more of it! As a minimum, we'll need a Lines Drawing (or at least a drawing showing the shape of the entire hull!) and a General Arrangement.
     
  6. J3
    Joined: Jun 2010
    Posts: 60
    Likes: 1, Points: 0, Legacy Rep: 16
    Location: MI

    J3 Junior Member

    I love the look and rendering style from an artistic standpoint! Look forward to seeing more of your work and/or this design as you work it. Your artistic style is great!

    Not to divert this thread, but it's interesting how speedboats here have totally sacrificed safe access to the bow in exchange for a sleek profile. In the 70s (feeling old typing that) the rails were adequate and sidedecks wide enough to walk fore and afteasily. Then rails became "ugly" and started to get cut down, or even disappear. Sometimes you have rails a few inches off the deck at best, to catch your toe or so you can grab on for dear life when it's rough. Windshields became lower and sleeker angle (love the look) but you can't step over them now. Sidedecks aren't walkable any more. Hatches are sleeker flush profile but often too small to get out easily. When you do if one accidentally tips closed, you can't easily open it again so you're stuck or have to jump over the windshield and hope you don't break something or twist your ankle. Sometimes you have a tiny fiberglass rim to step on kid sized steps at best. Often nothing on the sleek boat. I love the look of these boats still, but often wonder where the common sense went when it's rough and I want to get on the bow.
     
  7. kach22i
    Joined: Feb 2005
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    Location: Michigan

    kach22i Architect

    Maybe some of them use concealed bow deck access hatches?

    This is clean looking, could he just "scale it up"?

    http://www.revenger.co.uk/revenger32/rev32ow.html
    [​IMG]
    [​IMG]

    It has to be safer to go up through the inside than around the outside at some point.

    Although the outside would seem quicker in most situations.
     
  8. Thomas Ask
    Joined: Jun 2003
    Posts: 13
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    Location: Williamsport, PA, USA

    Thomas Ask Junior Member

    I liked the high speed Norwegian "snekke" photo. They are not meant to be fast but are the most delightful motorboat afloat (if you are in no hurry, especially at midsummer night with boiled shrimp and evergreen boughs on the rigging.....)
     
  9. dskira

    dskira Previous Member

    To design a good boat think of that:
    Its night and rainy, the wind blow force 6, the waves are shorts and high, you have to go to the foredeck, and then you have to go to the aft deck.
    The boat is jumping 7' to 10' and down in less than a few second, the motion is bad and you are at a real risk to be thrown overboard.
    Coming back to the helm the skipper has to see what is going on in front to him. And the oil low pressure alarm goes on, the engine need attention immediately.
    Down below is your family scare and not able to help for anything. They are thrown from one side to the other, and they ask you crying to go home. And you can't since you know it will be dangerous.
    Sound pessimistic?
    It is what happens all the time cruising. Perhaps not this year, but next. You never can be sure.
    Motor or sail, the sea don't make any difference, she turn bad in no time summer or winter.
    The question is: what kind of boat you will design? Do you will use the boat with your family? Are you willing to cruise in any condition with your design?
    Dramatic rendering are for the auto industry and the magazine in need of filling up white pages, since the advertisement industry is shrinking. Sleek and dangerous design is just a waste of time.
    Daniel
     
  10. rambat
    Joined: May 2002
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    Location: LA

    rambat Member at large

    A Go-Fast

    Contrary to the others, I say go ahead with a 24 degree dead rise aft and make it look sexy as your leaning toward. After all, no one that will be buying or using it for its fun, fast short day tripping purpose will be living aboard or taking it into any weather that might discourage their guest to sun-bath on the flat fore-deck. Designers need to keep the "Fun" boat elements separate from the house issues, they are pretty much incomparable.
     
  11. Alik
    Joined: Jul 2003
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    Location: Thailand

    Alik Senior Member

    Design is not a pretty rendering, it is development of complex object that works. Look at aesthetics, but also at perfromance, comfort, safey, cost.

    There is no way to design boat without knowledge of basics in hydrodynamics, FPR/metal/wood manufacturing and industry standards.

    What I see on rendering is good for car magazine, not for the sea. Sorry to say this...
     
  12. larry larisky

    larry larisky Previous Member

    half a million dollars for fun?
    fast short day tripping at 200 gallons?
    not fun.
    woman are fun and for half a million you can have fun. ;)
     
  13. J3
    Joined: Jun 2010
    Posts: 60
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    Location: MI

    J3 Junior Member

    If I ever get to the point where I have a few million extra, I think it'd be enormous fun. I'd love to have a baia :)
     
  14. monrosm@shrewsb
    Joined: Apr 2006
    Posts: 50
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    Location: England

    monrosm@shrewsb Junior Member

    Thank you for all the replies, a lot to take on board here, I agree with the things you say, but do remember this is a starting point.

    From my experience starting with a wild design that is bordering on the impossible which is then rationalised through a similar process to this leaves a working design which retains some flair of the original.

    Some points are obvious like fore deck access, soon to be rectified.

    Plan views and a package drawing are to follow within the next few weeks. Check back to see the developments.

    Stef
     

  15. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    The poll leans definetely towards a poor opinion. This is one of those fancy, computer generated designs, that would never result in a good boat.
     
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