Sailboat shapes

Discussion in 'Fiberglass and Composite Boat Building' started by pironiero, Apr 29, 2020.

  1. pironiero
    Joined: Apr 2020
    Posts: 22
    Likes: 1, Points: 3
    Location: saint-petersburg, Russia

    pironiero Junior Member

    Hello guys, im currently working on bulding plans of building my own sailboat and dividing them on stages.
    I dont have much experience but my father does, he already built 2 somewhat BIG boats 10 and 17m that doesnt sank yet =D

    General question at the moment is why boats are changing their shape? For example boats from like 1980 mostly shaped like a needle or a drop and modern ones are somewhat like triangle?

    Also what software should i use to check hull wave resistance and shtuff? im currently using DelftShip but maybe there is better stuff...
     
    DogCavalry likes this.
  2. bajansailor
    Joined: Oct 2007
    Posts: 990
    Likes: 263, Points: 63, Legacy Rep: 37
    Location: Barbados

    bajansailor Marine Surveyor

    Welcome to the Forum Pironiero.

    Re why boats are changing shape - in the 70's and 80's sailing yacht hulls were very much influenced by the International Offshore Rule (IOR) then, which seemed to favour pointed bows and pinched sterns.
    Re why modern boats are more like a triangle - I can suggest two possible reasons. This gives them better surfing speeds off the wind, and it also allow for large double quarter cabins under the cockpit.

    Would you like to share with us any drawings or sketches that you have produced so far for the sailboat that you are designing?
     
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  3. pironiero
    Joined: Apr 2020
    Posts: 22
    Likes: 1, Points: 3
    Location: saint-petersburg, Russia

    pironiero Junior Member

    I will but not untill i wont be feel ashamed uploading them, sorry, thanks for reply
     
  4. bajansailor
    Joined: Oct 2007
    Posts: 990
    Likes: 263, Points: 63, Legacy Rep: 37
    Location: Barbados

    bajansailor Marine Surveyor

    Why feel ashamed about uploading your ideas so far?
    They are your own work, and you can feel justifiably proud of them.
    If you post them on here, you will receive constructive advice that can only help to improve the design.
     
  5. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Is there a really strong reason for you to design the boat instead of buying good plans? The cost of plans is a very small percentage of the total cost. If the plans are faulty, nothing else matters because the boat won't perform properly.
     
  6. bajansailor
    Joined: Oct 2007
    Posts: 990
    Likes: 263, Points: 63, Legacy Rep: 37
    Location: Barbados

    bajansailor Marine Surveyor

    Gonzo makes a very valid point Pironiero - at the very least, it would be worthwhile if you purchase a set of plans that you like and which is close to what you think your requirements are.
    You can then use these as a basis vessel for designing your own boat - if your heart is truly set on designing it yourself.
     

  7. pironiero
    Joined: Apr 2020
    Posts: 22
    Likes: 1, Points: 3
    Location: saint-petersburg, Russia

    pironiero Junior Member

    i already have several plans that im looking into, bare with me guys, ill keep you updated as soon as ill set everything up.
     
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