Help with placement of linesplan

[Rubkvi]

I have started on a project to 3d model an offshore vessel, who im going to 3d print later. I struggle a bit to figure out where to place the lines, as there are no numbers on the lines in the front drawing. If someone have an idea to solve this, it would be a great help. I attach the ga drawing .

[CDR_Ret]

Hi Rubkvi.

 

Nice looking vessel!

 

Actually, getting the vertical scale for waterlines is pretty straight forward if you have a good set of plans and 2D software.

 

First, you take the profile plan and find the dimensions of either its overall length (93.40 m) or its LPP (82.20 m) using the drawing software. This will be a certain number of inches/centimeters. (I noted that the numbers along the keel appear to be frame numbers, not length, nor are they station lines.)

 

Then you divide the drawing length by the hull length to find the scale inches per meter.

 

Then build a ruler using this scale. Make it long enough to reach at least to the weather deck. Rotate it to the perpendicular and place it on the vessel's baseline. (Again, the horizontal lines in the body plan are decks, not waterlines.)

 

The vertical ruler is in meters.

 

This should get you to the point where you can create your waterlines for planning.

 

The station lines will be more difficult. There are 12 station lines visible in the forward view (counting the body plan outline). Figuring that the lower hull's maximum beam (at the tank tops) is about 49 m from the bow, that works out to about 4 m between stations (with maybe 1 m of the bow bulb sticking beyond the forwardmost station line there). A big problem you will have with these plans is that you have little idea what the hull shape is for the stern aft of maximum beam (and there is no aft view of the body plan). Unless you have additional plans and/or photos of the stern area in drydock, this will be difficult to replicate.

 

Hope this helps.

 

Terry

 

 

 

[Dane]

Hello. You should compare body plan and water lines plan. A station (or frame) on both plans must have the same width.

[Rubkvi]

Hi, thanks for all help. I'm not sure if I got solved the promlem. The 2 first station lines in the front view i now how to place, but the rest is more difficult to find where to place. 

[Dane]

It is impossible without a water lines plan. You must have a second projection. Or call Sherlock Holms for help. 🙂

Or you can check a theory like this. Usually frames are established at an equal distance. Therefore you can determine the positions of the frames based on the assumption of an equal distance between them in the side view. Like in the picture below.

Edited March 15, 2021 by Dane