Help With Hull Design

Discussion in 'Boat Design' started by Proflooney, Dec 21, 2016.

  1. Proflooney
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    Proflooney Junior Member

    I am trying to do a model of the R/V Atlantis which uses a AGOR-25 type Hull. I tried using Delftship but ended up with a ton of garbage. I wanted to use delftship so I had offset tables for the hull to make things easier when I transfer it all to Solidworks.

    My Profile and Plan View I posted Here http://www.proflooney.net/Research-Vessel.rar

    along with my garbage Delftship in case someone can tell me where I went wrong besides trying to figure out delftship lol
     
  2. Devu De Goa
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    Devu De Goa Junior Member

    You haven't provided any delftship file. There are only AutoCAD files & pictures. So can you tell what exactly is our requirement?
     
  3. Proflooney
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    Proflooney Junior Member

    Hmm I may have gotten ticked off and just trashed them lol ok here is the info on the ship from the institute. and once I gotten everything at full scale I want to shrink it to 1/48th scale model and have a project for my 2 grandkids (6 yrs old) to help me build as a grandpa grandsons project.



    1/48th scale 68.5"


    R/V Atlantis Specifications


    Built: 1997
    Length: 274 feet
    Draft: 19 feet (5.8 m)
    Displacement: 3,510 LT
    Range: 17,280 NM
    Laboratories: 3,517 sq. feet
    Speeds: 11.0 knots cruising
    Alvin Conversion: 1997
    Beam: 52.5 feet
    Gross Tons: 3,200 T
    Complement:
    Crew - 22
    Scientists - 24
    DSOG - 12
    SSSG Techs - 2
    Endurance: 60 days
    Fuel Capacity: 267,540 gallons
    Propulsion: Diesel-electric, azimuthing stern thrusters
    Bow Thruster: Azimuthing jet 1,180 SHP
    Ship Service Generators: Three 715 kw 600 VAC
    Portable Van Space: At least six 20 ft. vans
    Winches:
    Traction - 30,000' .68" EM or 9/16" wire
    Hydro - 33,000' 3-cond. EM or 1/4" wire
    Heavy Equipment:
    Cranes - two @ 42,000 lbs. cap.
    HIAB cranes (2)
    Midships hydro boom
    Sewage System: Envirovac flushing system
    Ownership: Title held by U.S. Navy; operated under charter agreement with Office of Naval Research
    Other Features: Dynamic positioning system, ROV and submersible hangars, fully equipped machine shop, two rigid-hull inflatable rescue/work boats
     
  4. Proflooney
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    Proflooney Junior Member

    I am not worried that it is an exact specification hull like the real ships would have to be. I am just wanting to get a good shaped hull that I can use for a Model
     

    Attached Files:

  5. Proflooney
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    Proflooney Junior Member

    Found my Delftship Model
     

    Attached Files:

  6. Proflooney
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    Proflooney Junior Member

    Also if anyone uses Delftship is there a way to rotate around your hull rather than just the normal views?
     
  7. Devu De Goa
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    Devu De Goa Junior Member

    You can try rotating it by pressing and holding the scroll button when you are in the perspective view.
     
  8. Devu De Goa
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    Devu De Goa Junior Member

    This is how that model looks in body plan. Don't know if I have missed something in the data you have provided but I did not find a body plan in that. If you do not want exact lines, you will have to provide a "shiplike" shape below waterline by adjusting the surface control points.

    But if it is only for the sake of a display model, it will be better if you can find an existing sample from the database.

    How do you plan to make the model?
     

    Attached Files:

  9. Devu De Goa
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    Devu De Goa Junior Member

    Try searching the built in database in Delftship -> New project > parent hull > online model database..
     

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  10. Proflooney
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    Proflooney Junior Member

    that is what I meant I tried adjusting the lines on a premade hull and I got that mess. the more i tried to move points around the worse it gets. there should have been images of the hull in there I was using as a guide.

    I put the views at http://www.proflooney.net/Views.rar

    in case they werent in there
     
  11. Devu De Goa
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    Devu De Goa Junior Member

    The vessel you are modelling is about 83.5 m. Where as the model available for a research vessel in database is about 103 meters. I think it is similar to your vessel. Only you may need to do some scaling by using tools -> scale. Search for it in "type of vessel : motorboat" - no. 16 from top. Do not change the points by yourself if you are not familiar with the functions. Scale command is enough.
     

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  12. Proflooney
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    Proflooney Junior Member

    I have seen that vessel but if you look at the stern picture I posted above it has some weird angled shape on the side of the vessel. I know I could just pick a hull thats sort of close and go with it but I like to be as accurate with the hull design as I am with the rest of the ship
     
  13. Devu De Goa
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    Devu De Goa Junior Member

    Yes that is an interesting shape. The designer has carried he FOS (Flat of Side) up o aft end and merged with transom. It is possible to do that in your model. You need to take the heights (z distance) from your AutoCAD file (look for a curve at aft in the profile) and keep the transverse distance (y dist) same as main deck, at each frame (x dist).

    The rest of it below this knuckle is a curve which you can only replicate with the original Lines plan or a good intuition.
     
  14. Proflooney
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    Proflooney Junior Member

    yea I might just do a generic research vessel using a hull from delftship it wont be the same model I wanted to do but I am no boat designer so i guess im stuck. but thanks for the help i learned a lot more than i did. now if only I can figure out this stupid delftship just wished they had better instructions. the working with that little rowboat doesnt help with bigger hulls
     

  15. TANSL
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    TANSL Senior Member

    If you want to be accurate when creating the model, you will have no choice but to start, at least, from a body lines plan or an offsets table.
    If you have this information, I can help you to create a model in AutoCAD.
     
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