ship

We will participate in a competition with our friends to make an unmanned marine vehicle. We are all aerospace engineers, we need to learn the formulas. We will use in ship design, we do not know which formulas to use, how to use them, where to apply them. Can anyone suggest an open source? We...

Dear all, I am a research engineer starting out with CFD using Star-CCM+. I am new to this forum, but I was hoping to receive guidance from your expertise. As I was sourcing the web, I could not find a CAD model/rhino/publicly released hull for download for the DELFT372 catamaran, or the R/V...

I was studying about the safety requirements for passenger ship catamaran type. For example the vessel Bona Vida has the capacity of 200 passengers - the website claims. How practical it could be to have 200 pax for such a small catamaran? Furthermore, interested in knowing the vessel safety...

Could you please tell me if there exists any empirical formula to estimate the center of the gravity of ship based on the vessel's particulars? Just for rough estimation or getting an idea?

Hi, We would like to buy winch machine for our dockyard. Could you please tell me what are the things we need to take into account to purchase a perfect winch for docking and undocking. So far I have understood I need to buy a friction winch. We would like to dock maximum 800 T (lwt) vessel...

Could you please tell me the disadvantages of portable winch for docking and undocking purposes using airbags? Can I also use the portable winch for slipway?

Do I need to take into account CCA for electric outboard/inboard motor? Does CCA have any impact for electric motor? I see most of the boats of 12V batteries. However, mine is 350V. In case of design boats how much space is usually considered for storing batteries? Should I buy one big...

Hello, I am currently on the search for a ship designer to allow for a first draft of a cargo sailer ship! If you are ambitions and want to take on the challenger, please let me know. And, if you know naval designers in which I can enable in a direct conversation with, let me know as well...

Hi, I have a query about ECR (Engine Control Room). Is it mandatory for a vessel? In a vessel I have an Engine Room and a Generator Room. The machinery will be controlled remotely from the Wheel House. Do I still need a separate control room? I would like to exclude the control room since two...

Hello there, As I'm working on Holtrop resistance prediction method, I would like to know how to find the Angle of entrance value. I have used the formula attached to the thread. In some cases, I get values like 58.6, 64.2 so n so. I wanted to ask if it's right or wrong. The length of run = 96%...

Hello, Initially my ship is in at Zero heel(TCG=0) with a displacement. But when I increase the value of VCG(KG) , at a certain point(Above allowable VCG i guess) Vessel heel and TCG also increasing. Why it is so?

Hi, I have come across a nonclass Tug Boat that is already built. The vessel is experiencing too much rolling and pitching. The principal particulars of the vessels are LOA 12.2m, Beam 4.68m, Depth 1.8M Draught 1.4M. The GA and other information are attached herewith. Now at this stage, how...

Hello, I am a student of Naval Architecture. I am doing scantling of midship section. I have calculated section modulus for various member. I have to calculate the dimension of various member from this section modulus. I am badly in need of a chart, where I get the dimension regarding section...

Hi, I am doing stability calculation for a passenger vessel. I am modelling in Maxsurf. I have made the model in Rhino and then imported in Maxsurf. Now I have the following questions. 1. Do I need to design all the decks for stability calculation? 2. Do I need to trim the surfaces in the...

I teach at Southern Maine Community College. We are redesigning our Marine Design certificate, which we offer in partnership with Bath Iron Works, and I am looking for a sample 3D model of a complete ship, including the structural and mechanical systems, that we can use in analyzing and...

Good Evening. I am having problem deciding the specifications of my propeller, I have already obtained the curves for Resistance and Power vs speed. My ship has a Length of 91m, beam of 10.5m and a Draught of 4.5m. It is presently run using a 5 bladed 2.8m dia two in number propeller and with a...

Hello, I am currently a student and I have been assigned to calculate the Stability for a 6.0 m in Length and 2.4 m in Beam motorboat using the "DNV GL I.3.3 Yachts and Boats up to 24m" and Orca3d program in Rhino. The problem is that I was not told how to do that. I have already calculated...

LOA - 3.80 m Beam - 1.85 m Hull workshop documentation available.

I have a problem in validating the results of a ship motion from aqwa and maxsurf. When i calculated rao, the result look like same. But when i calculated rms of rolling motion. The result too much different. My assumption, i cant define how to calculate rms motion using wave frequency...

Anybody familiar with evacuation plan of passenger vessel? Is it applicable for existing ships?