Jesus Cruz

[Jesus Cruz]

Actually you do have the option to choose the stations spacing, the Icon that allows you to choose stations, waterlines buttocks, spacing of each of them, also you can reach it from the View menu labelled as “Intersections”.

Once you finished modelling your hull you can move it to any place you want, this includes move the model to right position so the meeting of the DWL with the stern is located at X= 0, and then you can relocated stations to the spacing that you prefer.

Hope this helps

[Jesus Cruz]

Is the color of the flowlines, thay don´t make any contrast with the hull color below waterline that i choose (blue), is there a way to change the color of the flowlines?

Thanks

[Jesus Cruz]

I push tha ALT button and then click with the mouse on the hull below waterline, and nothing happens.

Thanks

[Jesus Cruz]

I strongly recomend to you that you buy the professional version, It pays itself, I know mine did, heheheheheheheh

[Jesus Cruz]

Wildeplorer:

Taking your definition of Midship Section for the default you have 3 different locations of the Midship Section.

1/2 DWL = 6.19 mts.
Largest Beam of DWL= 5.3 Mts.
Max Cross Section = 5.8 Mts.

What I used is the 1/2 DWL, because is depending on the floating conditions that I expect that my design operates

Best Regards

[Jesus Cruz]

You are entitled to your opinion thats for sure!!

But my opinion is I CAN, and I have designed yacth hulls with the true LCB, and I have got good results with the Hull trsnaformation.

And I´m also entitled to my opinion.

Best Regards

[Jesus Cruz]

Is obviuos that we have different design technics, regarding DELFTship, yes I believe that it can improve but for different reasons and in different areas that you do, and I honestly beleive that is the best of it´s kind available.

But also for me the software is a tool, it doesn´t supose to substitute knowledge, experience and common sense.

And I do trust in the hull transformation because I have used and has gave me good results, so as we say in Mexico “A guy talks about the party according how much fun he got”.

Regards

[Jesus Cruz]

I have seen the pictures of you book, but insist when you Model a hull, you have to start from basic concepts like a determined LOA, Beam, Depth, and with a theoretical asumption of weight, that will lead you to the first LWL which is also called DWL.

From there you will modify the hull according your needs, but the changes can´t be so drastic, the DELFTship software also gives the “Hull Transformation” feature, is in the transform menu there you can modify your hull according certain basic parameters such as:

– Displacement
– Block Coefficient
– Prismatic Coefficient
– Long. Center of Bouyancy

With this feature the software will modify your hull forms to match the data of the 4 above mentioned that you indicate to the software.

I think that this feature will save you a lot of points moving and will give you the LCB location that you want.:) 😉

[Jesus Cruz]

You got to be kidding.

What do you need the calculation before you finish modelling your hull?, beside it took me 3 minutes to do it.

Under normal conditions you have to model the hull first and then you can verify the calculations to see if it cumplies with your requirements (or needs)

If it doesn´t, you correct the hull to cumply with your needs, but I don´t see myself correcting the Hull beyond the basic parameters that are Length, Beam and Draft, and under those conditions the Midship section location is not going to change drastically.

Remember the LWL is theoretical, when you finish building your boat she may not float in the LWL that you calculated originally.

[Jesus Cruz]

Step 1. Create the default model

2. Go to the profile view and located the punter of your mouse right in the crossing of LWL and the Stern of the model (App), on the upper right corner of the screen you can see the coordinates X and Y of the point, for this specific example are X= 1.36 mts, Z= 0.500 mts. (obvius)

3. Locate the punter of your mouse on the crossing of LWL with the Bow (Fpp), same thing right upper corner the data X= 10.96 and Z= 0.500 mts.

4. Deduct from the 10.96 mts, the 1.36 mts, and you get 9.6 mts, which is the waterline length, you can compare the result with the Design Hydrostatics report.

5. The location of the midship section would be 1.36 plus 4.8, or 6.16 mts, from the X=0 point, just use this data instead of the 0.5 L.

Keep in mind that DELFTship is a software that can be use for model all kind of ships and floating structures, so this is why i consider the feature of giving the option to locate the midship section location to the user´s will a very good feature.

Regards

[Jesus Cruz]

What you can probably do, is export the plate develoment to a DXF file and then manage it as a cad file and send it to print, I´m not sure if the free DELFTship allows you to export to DXF files

But thats an option that you can check

[Jesus Cruz]

So according your book the Midship section should be located at the middle of LWL right??

In the case that you mentioned here the middle of the LWL should be at 4 mts. not at 4.5 right???

so your book is giving you two different locations of the Midship section Half LWL and (0.5+LWL/2), right?

In any case in the initial stages of the design is imposible to know where the real LWL is going to be, you have to take a “Design LWL”, and as you advance in your design, you will have a better approach of the final floating conditions of your ship (any vessel, either yacht or cruise).

Thats how you stablished the Midship section in an early stage of your design, and corrected if you considered appropiate in a late stage.

So location of the Midship section in the Half of LOA, and having the posibility to located in any place that the designer choose, as Delftship does, is in my opinion a very good and flexible feature.

[Jesus Cruz]

You can export it either 2D or 3D, i prefer to export it in 3D, I feel more comfortable.

[Jesus Cruz]

I don´t know if the free version can export to DXF, but that is a good way to export the cross sections (or import), then you can open it with any CAD software or even with the DWG true view which is a dwg files viewer (free) and you can take dimensions to have the cross sections dimentions.

Hope this info helps, Regards

[Jesus Cruz]

With this software you can model, pretty much any kind of hull, including submarines of any kind

Regards

[Author]

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