I am a ship enthusiast and love the design process of just about anything, but have always considered naval architecture as the most challenging of all. Thus, the process of fully making sense the Guess-Check style with all the various major to minor cycles, and then back to major makes total sense. Thanks for putting this out there, and time to bone up on my Excel!! Ken.
Speaking as a hobbyist and a civil engineering tech: Not only is this neat from a naval architecture standpoint, this is a fantastic presentation on the engineering process--MetaEngineering, if you will. The next time I run into some young folks considering a career in engineering, whatever discipline, I'll point them at this as a resource. Nick, if you don't eventually end up as an old, crusty professor, I will be very disappointed. (Yes, I know you give seminars occasionally.)
I was looking for this precisce video, and I was so thrilled at your self-styled intro "Nick the Naval Architect." It's a thing! ;) Thanks for existing in the niche I needed!
The loft command is pretty close to how the lines program calculates the final hull surface from curves we put in. But you still need the custom tools to check for a smooth curve in all three dimensions for any complex hull shape. They are normally hulls that have compound curvature: the surface curves in both directions. Another item that we often check is developable surfaces. These are shapes that only have curvature in one direction. You can create them from flat steel plate with just a plate roller. Much cheaper than compound curvature, which requires a lot more skill to create.
@7:00 So if you had a trimaran with the perfectly circular hull cross section, and small amas for stability, would this be the best thing for fuel consumption? Or would the extra amas just add more drag than an equivalent monohull?
That is a brilliant question. And you are 85% correct. The trimaran works best for higher speeds, where resistance is dominated by waves. At low speeds, most of the resistance comes from friction with the water, and we want to reduce the wetted surface area. In that case, a trimaran loses. It has 3 circles in the water, so more surface area than an equivalent monohull. From a stability perspective, trimarans are halfway more stable. The trimaran has way more stability than a monohull . . . unless you heel so far that one of the amas goes underwater. Then it has no stability. So it is more stable, but our requirements go up to ensure the trimaran never buries the amas.
@@DrZygote214 The speed changes depending on the ship size, which is why we normally determine these thresholds with the Froude Number, a non-dimensional measure of speed. Wikipedia has a simple explanation on Froude Number (Fn): en.wikipedia.org/wiki/Froude_number In general, ships below a Froude number of 0.30 are dominated by friction. Above Fn = 0.30, waves start to dominate. When we perform a resistance estimate, the friction and wave making get calculated separately, which lets us examine the relative magnitude of those two components.
It's not new knowledge but really captures the essence, and besides it's good fun and it's inspirational compared to reading the good old Naval Architecture books, so I really enjoy these videos. Brgds, Peter form Denmark, Naval Architect with 25+ years of experience
Very interesting. Coming from a product development background, wouldn't the first step be to figure out what the job of the ship will be and what equipment is needed? At least for non-cargo ships. I've never worked on ships before, but I assume the weight of that equipment multiplied by a factor which depends on the ship type (possibly with an added range parameter) should give a pretty reasonable initial weight estimate.
The equipment weight can be surprisingly consistent within each ship type. This is mainly because we need so much equipment for basic life support and powering that additional deck hardware doesn't add much to the baseline. (There are some exceptions like fishing boats and oil rigs, which is why we start with similar vessels from the same industry.) But the rest is spot on. Yes, before we even do a concept design, it can be helpful to do a mission study, where we define the ship's job in engineering terms. One of the biggest items in the mission study is finding any restrictions on the vessel dimensions. We look at the different ports the boat will visit and check for shallow draft, or low bridges, narrow channels, etc. And then that forms the starting point for the concept design.
You prefer computer assisted line drawings. The 21st century is amazing. I cannot help but think 19th century. They must have been some amazing minds. Were there more failures than successes? Or did they have it pretty well understood?
I wouldn't say that the 19th century was bad. They still have fairly reliable transport back then. But it depended mostly on copying previously successful designs. The 19th century involved less design risk. They didn't have all the science and simulation capabilities I have today. With modern computers and science, I can design a boat completely on the computer. All theory and no physical testing. And the first ship will be built within 5% of the theoretical predictions. (rough estimate). That type of confidence makes it cheaper to try new things and predict them before risking the ship. So modern shipbuilding is partly about being safer. But it also achieves more performance, with the same level of safety and cost.
I read they used Simpson's rule to help calculate the displacement. For each cross section, the area can be determined using a planimemter: a device looking like a divider with a counter. Just trace the crossestion and the area can be calculate.
@@DatawaveMarineSolutions The 1800s editions of the Royal Institute if Naval Architects were pretty amazing to read through. While I was getting my degree I perused probably 25 of their annual collected editions.
I'm turning fifty in a few days and I've been going through that process of asking what kind of person I am versus what I could have been. I was never fully certain what I wanted to do while I was in school. I never doodled, I only drew ship designs. I was sort of obsessed with the idea of making the most with limited space. I graduated and had no idea what I wanted to do. How come the idea of ship design didn't cross my mind? Maybe I missed my calling who knows. Anyway this video was great because it was exactly what I needed! Too bad I didn't at least give it a shot because it looks exciting.
I feel ya... Trust Your instinct and engage with what still motivates ! Low-tech ship building isn't that inaccessible as it may sound, and one's own design will grant informed judgement of it's capabilities and requirements, answering what is worth, constructing for the intended use.
so now the question is how to design cargo submarine that can carry containers (or grain, or something like ore) and allows to unload it in a reasonable time. I wonder if it's even possible to gain profit from shorter route (under ice cap) or cost of such technology would outweight profit from transporting goods 3 times faster.
Sorry, but DMS doesn't offer NeoShip for sale. The program requires adjustments with every project. This approach is suitable for internal use, where DMS is both user and developer. But it will not work as a packaged program we can sell.
i wonder how Your app handles in design of sailing vessels (i wonder how to predict hull behaviour at different heel and different speeds and wave heights)
Neoship doesn't go to that level of detail. That is more appropriate for a velocity prediction program, which is how they design racing boats. But Neoship does calculate sail forces without the hull interactions. It also includes voyage analysis to determine average power from the sail, considering variability of wind strength and direction within a region.
@@DatawaveMarineSolutions I find one thing particularly difficult: smaller the vessel, bigger the impact from waves. How to calculate this when one second wetted surface is (for example) 25 m2 and 2 seconds later its 33 m2. On a bigger boat this variations are not that big in relation to overall dimensions. Here I'm looking for efficiency in environment of constant change.
@@gradowik No easy answer to that. Basic version: start with a hull that is efficient in calm water, and then focus on minimizing vessel response to waves. For a more analytical approach, seakeeping theory allows us to calculate the resistance added from waves, based on 2nd order low frequency drift forces. We can analyze the efficiency lost due to waves and compare alternatives. Unfortunately, that advanced analysis often requires more budget than a small boat can justify.
Sorry, Neoship is only available as a service that DMS offers. It isn't stable enough to offer for sale. This was a conscious tradeoff to maintain flexibility. I frequently need to adjust some of the settings to ensure stable operation for each new concept design. That's why i can only offer it as a service.
(NOT legal advice. I'm an engineer, not a lawyer.) In the US, copyright is automatically granted. No need to file anything. Although I do include a copyright statement on all drawings and reports, specifically so people can't claim lack of knowledge about the copyright. But copyright only protects that individual drawing, not the entire design. Nothing to stop someone from using the drawing as inspiration and copying the good features. I have heard of companies patenting unique features of their design. But never the entire design. Intellectual property laws were never really intended for engineering in the US. There is no easy solution currently.
haha, during the whole video I was thinking: I'm pretty sure they start from the traditionnal hull shape used in the business area of the client, customize it and at most try 1 innovation point, and in the end that was exactly the message. Full blue sky innovation of objects this size is probably managed in programes, that would involve universities, and a ton of models and uncertain outcomes. They would not get into such a pipeline when a client "just" wants a ship and has already chosen the name for it.
Very true. I meet a lot of Clients who just want a copy of the current hull in their business area. In fact, I know one firm that specialized for this. They just make tug designs, which are basically cut and paste engineering. Very little changes from version to the next. The good news is that we don't often need to go to full university and research for true innovation. But it does take slightly more engineering. For example, I have one Client that wants to create a net zero ship with sails and a new fuel source. That is not a full research project, because we already have science for all the individual components. It's just a matter of mastering the mix. A full research project would be if Raytheon wanted me to design a super-cavitating torpedo. The problem for that project would be that we can't predict torpedo guidance at super-cavitating speeds. (At least not that people admit publicly.) So in that case, we first need research to invent the science for predicting our problem before we can even solve it. Thankfully, very few people fall into the research category. You can achieve a lot with custom engineering.
@@DatawaveMarineSolutions To be fair, 'traditional' designs may have incorporated considerable 'trial and error' over generations of their production when e.g. Bruce Bingham simply sketched out two derelict 1050s workboats and 'reverse engineered' them as the Flicka daysailer - which was said to be surprisingly performant, given their generous cabin...
in reality its almost impossible to have LCB=LCG even if you manage to line LCB with LCG at first. it wşill change over time because of fuel consumption.
@@colaves1 which is not suitable especially in big ships. Fuel tanks need to be somewhere near engine room. Pumping the fuel from midship where the LCB and LCG are usually are (towards the aft most of the time) is an task of its own. İts possible in smaller ships maybe upto 20m or so. in a bulk carrier its not the best possible way to place fuel tanks
In the books Principles of Yacht Design by Lars and Rolf Larsson, use of Simpson's rule for the calculation of the hull's characteristics is shown. It was recommended to use a planimeter for the crossetions. This was for those without access to CAD.
@@shaider1982 yes, before computers, the methods used for integral estemation were quite clever. But in a world where butane lighters exist, theres no real sense in rubbing sticks together these days.
I always wondered if it would be possible to scale down at least the overall shape of one of the classic Edwardian liners in a package that is roughly 80-100ft in length. ...with tweaks to make the design practical, of course. I just don't have the math background to actually run the numbers though!
About 15-20% different. The process is generally the same, just a few additions for structure and propulsion. Now we need to design a mast and sails, change the hull shape slightly. Same process, just different priorities. But this becomes much more effort when designing a small sailing ship (anything under 40 ft. / 12 m.) On those, space is so limited, that you really need to consider the ergonomics of how someone will sit in the cockpit, how to arrange all the lines for easy access, how many winches will the ship have, etc. That human element adds a lot of effort when laying out the ship.
@@DatawaveMarineSolutions "(...) more effort when designing a small sailing ship (...)" I'd love to see a quantitative comparison between David Raison's Maxi 650 (in serial production by IDBMarine) and Janusz Madersky's Globe 580 (available as an assembly kit). I can't even tell what length, I should look for when browsing for used boats (even 200 foot plus can be sailed, shorthanded, but I'm hardly independent if I can't even erect the mast, myself or require inboard engine maintenance - having _one_ spot to stand upright within a cabin would be nice, so would be a closed wet head)... One could probably crank out regular videos on any ship, 'Yacht Monthly' comes up with - commenting on design choices...
I'm drawing up plans for a fictional ship and decided I wanted to try making an actual realistic plan of her. She's 47 meters wide by 352 meters long (roughly). The GRT I'm projecting is around 90-95,000 maybe even 100,000. In my fictional universe, she's drawn up in the mid-to-late 1920s and construction started sometime in like, 1928 or 1929. then the stock market thing happens and construction halts. The project resumes once funds are located and she's launched on 17, August 1934 (in lore). She has her maiden voyage in 1936 iirc. Its still a WIP. Her hull is 41 meters tall. with the supestructure, masts and stuff, she's around 170 something meters tall. Do I know if she'd actually work as a real ship? nope! but I certainly can theorise!
You can build a scale model and find out in a tub where the points of gravity would be. Current super container ships do have surprisingly tall loads on a completely flat - but wide - bottom hull. Adjusting the 'beam' can possibly make the semi-Eiffel Tower bridge, plausible if all superstructure load is distributed, evenly...
ok, so I am struggling, I want to design a ship with defense at all 360 degrees with main gun batteries and engines that look aesthetically pleasing and in my lore
I am an outdated mechanical designer/engineer of heavy equipment than wants to build his own small light weight car topable boat. Who now works as a laborer because too many heavy equipment companies went out business. My brother a retired landscaper built a successful foamy row boat.( Constructed from closed celled styrofoam bought from a building supply store) I have watched several videos from creators that have constructed similar boats using poor man's fiberglass and construction foam. (burlap or an old bed sheet to replace the fiberglass and then exterior house paint to replace the epoxy) My nearest lake is 8 miles away, has a large surface area of water, and in many areas only has a 3 foot water depth. ( typical Midweastern USA lake) My first thought was a sail boat and a fising boat. Due to the shallow water depth, fishing is always better in the shallow water, and the fact that such shallow water can quickly develop rough water conditions, I have abandoned the sail boat concept and the flat a hull. ( a typical design for inand water boats) ( have been in a float bottomed John Boat in rough waters and they are hard to steer and required a lot of force to move them in rough water, and they have a terrible choppy ride.) I have now decided to build an axe bowed boat with side angles 20 or 25 ° on the bottom to get the boat to sit slightly lower in the water, because I want to make my own boat, and a 25 pound or under 2.5hp, 2 cycle motor. I want to add a splash or wash board on top of the front to keep the waves from washing water into the boat. I want some speed in my hull with rough water capability. ( a little of the best of both worlds) I don't see this type of construction on inland boats. I think that I am on the right track. Am I on the right track? Have used Excel to iterate other engineering problems and it works great even if you just do it by trial and error. Looks like you have a great concept.
Sounds like a V-shaped displacement hull, like motor boat designs (used to be made from aluminum) - yet, a fold-able multi-hull with austere Kayak like hull 'crawl cabins' would grant much stability without much draft (though would consume time to assemble and disassemble, each time)...
The whole guessing the weight bit is fine until your designing an ocean liner. How much do the cabin furnishings weigh? No clue. How much does the loose cargo weigh? No clue. Take a blind guess and refine it later, then do the whole thing again until its right? Yes. Yes of course.
Hello Nick. I suppose that your education has brought you to this point, propelling you to post your ambitions on youtube, and as you live and breathe today, you are still boiling down your hypothesis'. The point of this message-- could you be the one that creates the ultimate hull?
I think you are doing it wrong. your trying to avoid wasting time going down a lot of dead end roads , your behaving like a "professional" ever notice how professionals never seem to invent anything new ? Try this instead , create a list called " The design requirements for this craft will be " and a second list called " Design priorities." and take your time (I often wake up in the middle of he night just to re adjust the priorities , getting your priorities right is the most important part). When you have these two lists so you are happy with them THEN make your first rough drawing of a ship that will meet the requirements and priorities on your 2 lists.
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
Rule #1: Keep *almost all* of the water on the *outside.*
This made me laugh WAY harder than it should have!! Thank you!!
tell that to titanic
@@NotPacificwho said it's a ship
It's a submarine bruhhhhhhh
@@VvVv-k5y no the submarine imploded
Hamster ball.
I am a ship enthusiast and love the design process of just about anything, but have always considered naval architecture as the most challenging of all. Thus, the process of fully making sense the Guess-Check style with all the various major to minor cycles, and then back to major makes total sense. Thanks for putting this out there, and time to bone up on my Excel!! Ken.
The enthusiasm of the presenter explaining things in pretty simple language makes this such a valuable and interesting watch
I'm watching all this for an art project. he makes it so fun
Speaking as a hobbyist and a civil engineering tech: Not only is this neat from a naval architecture standpoint, this is a fantastic presentation on the engineering process--MetaEngineering, if you will. The next time I run into some young folks considering a career in engineering, whatever discipline, I'll point them at this as a resource.
Nick, if you don't eventually end up as an old, crusty professor, I will be very disappointed. (Yes, I know you give seminars occasionally.)
I think it would be like classic submarine but more like skyscraper because if it accelerate it give you the Illusion of gravitational forces
I appreciate a lot that I can understand easily your English .
I was looking for this precisce video, and I was so thrilled at your self-styled intro "Nick the Naval Architect." It's a thing! ;) Thanks for existing in the niche I needed!
Your use of genetic algorithm optimizer is awesome! Very cool
9:00 I guess using loft in Solidworks is only practical for simple hull shapes.
The loft command is pretty close to how the lines program calculates the final hull surface from curves we put in. But you still need the custom tools to check for a smooth curve in all three dimensions for any complex hull shape. They are normally hulls that have compound curvature: the surface curves in both directions.
Another item that we often check is developable surfaces. These are shapes that only have curvature in one direction. You can create them from flat steel plate with just a plate roller. Much cheaper than compound curvature, which requires a lot more skill to create.
@@DatawaveMarineSolutions wow, I did not know that. Thanks for the added information.👍🏻
@7:00 So if you had a trimaran with the perfectly circular hull cross section, and small amas for stability, would this be the best thing for fuel consumption? Or would the extra amas just add more drag than an equivalent monohull?
That is a brilliant question. And you are 85% correct. The trimaran works best for higher speeds, where resistance is dominated by waves. At low speeds, most of the resistance comes from friction with the water, and we want to reduce the wetted surface area. In that case, a trimaran loses. It has 3 circles in the water, so more surface area than an equivalent monohull.
From a stability perspective, trimarans are halfway more stable. The trimaran has way more stability than a monohull . . . unless you heel so far that one of the amas goes underwater. Then it has no stability. So it is more stable, but our requirements go up to ensure the trimaran never buries the amas.
@@DatawaveMarineSolutions Thanks! But what is the threshold between higher and lower speeds? 30 kmh?
@@DrZygote214 The speed changes depending on the ship size, which is why we normally determine these thresholds with the Froude Number, a non-dimensional measure of speed. Wikipedia has a simple explanation on Froude Number (Fn): en.wikipedia.org/wiki/Froude_number
In general, ships below a Froude number of 0.30 are dominated by friction. Above Fn = 0.30, waves start to dominate. When we perform a resistance estimate, the friction and wave making get calculated separately, which lets us examine the relative magnitude of those two components.
It's not new knowledge but really captures the essence, and besides it's good fun and it's inspirational compared to reading the good old Naval Architecture books, so I really enjoy these videos.
Brgds, Peter form Denmark, Naval Architect with 25+ years of experience
Many thanks. I target these videos for the general public. But I greatly enjoy learning that other naval architects find some value or interest in it.
Have you done a video on stretching a fiberglass yacht? I couldn't find one.
Not yet. Though that is a good idea. I will add it to the list.
Very interesting. Coming from a product development background, wouldn't the first step be to figure out what the job of the ship will be and what equipment is needed? At least for non-cargo ships. I've never worked on ships before, but I assume the weight of that equipment multiplied by a factor which depends on the ship type (possibly with an added range parameter) should give a pretty reasonable initial weight estimate.
The equipment weight can be surprisingly consistent within each ship type. This is mainly because we need so much equipment for basic life support and powering that additional deck hardware doesn't add much to the baseline. (There are some exceptions like fishing boats and oil rigs, which is why we start with similar vessels from the same industry.)
But the rest is spot on. Yes, before we even do a concept design, it can be helpful to do a mission study, where we define the ship's job in engineering terms. One of the biggest items in the mission study is finding any restrictions on the vessel dimensions. We look at the different ports the boat will visit and check for shallow draft, or low bridges, narrow channels, etc. And then that forms the starting point for the concept design.
You prefer computer assisted line drawings. The 21st century is amazing.
I cannot help but think 19th century. They must have been some amazing minds.
Were there more failures than successes? Or did they have it pretty well understood?
I wouldn't say that the 19th century was bad. They still have fairly reliable transport back then. But it depended mostly on copying previously successful designs.
The 19th century involved less design risk. They didn't have all the science and simulation capabilities I have today. With modern computers and science, I can design a boat completely on the computer. All theory and no physical testing. And the first ship will be built within 5% of the theoretical predictions. (rough estimate).
That type of confidence makes it cheaper to try new things and predict them before risking the ship. So modern shipbuilding is partly about being safer. But it also achieves more performance, with the same level of safety and cost.
I read they used Simpson's rule to help calculate the displacement. For each cross section, the area can be determined using a planimemter: a device looking like a divider with a counter. Just trace the crossestion and the area can be calculate.
@@shaider1982 yes they did. In fact, Simpsons rule is still something they teach naval architects. And some programs still use it.
@@DatawaveMarineSolutions The 1800s editions of the Royal Institute if Naval Architects were pretty amazing to read through. While I was getting my degree I perused probably 25 of their annual collected editions.
I'm turning fifty in a few days and I've been going through that process of asking what kind of person I am versus what I could have been. I was never fully certain what I wanted to do while I was in school. I never doodled, I only drew ship designs. I was sort of obsessed with the idea of making the most with limited space. I graduated and had no idea what I wanted to do. How come the idea of ship design didn't cross my mind? Maybe I missed my calling who knows. Anyway this video was great because it was exactly what I needed! Too bad I didn't at least give it a shot because it looks exciting.
I feel ya...
Trust Your instinct and engage with what still motivates !
Low-tech ship building isn't that inaccessible as it may sound, and one's own design will grant informed judgement of it's capabilities and requirements, answering what is worth, constructing for the intended use.
A circular needle hull might not capsize if the center of gravity is close to the bottom of the hull.
True. That is basically how a submarine maintains its stability when fully submerged.
so now the question is how to design cargo submarine that can carry containers (or grain, or something like ore) and allows to unload it in a reasonable time. I wonder if it's even possible to gain profit from shorter route (under ice cap) or cost of such technology would outweight profit from transporting goods 3 times faster.
Hi, any book about ship design that you can suggest?
How do i get the software (NeoShip ) for the design
Sorry, but DMS doesn't offer NeoShip for sale. The program requires adjustments with every project. This approach is suitable for internal use, where DMS is both user and developer. But it will not work as a packaged program we can sell.
Where to get neoship from?
Hello dear. excellent videos.
I would like to see a video of how to select emgine and reduction gear? thank you
i wonder how Your app handles in design of sailing vessels (i wonder how to predict hull behaviour at different heel and different speeds and wave heights)
Neoship doesn't go to that level of detail. That is more appropriate for a velocity prediction program, which is how they design racing boats. But Neoship does calculate sail forces without the hull interactions. It also includes voyage analysis to determine average power from the sail, considering variability of wind strength and direction within a region.
@@DatawaveMarineSolutions I find one thing particularly difficult: smaller the vessel, bigger the impact from waves. How to calculate this when one second wetted surface is (for example) 25 m2 and 2 seconds later its 33 m2. On a bigger boat this variations are not that big in relation to overall dimensions. Here I'm looking for efficiency in environment of constant change.
@@gradowik No easy answer to that. Basic version: start with a hull that is efficient in calm water, and then focus on minimizing vessel response to waves. For a more analytical approach, seakeeping theory allows us to calculate the resistance added from waves, based on 2nd order low frequency drift forces. We can analyze the efficiency lost due to waves and compare alternatives. Unfortunately, that advanced analysis often requires more budget than a small boat can justify.
@@DatawaveMarineSolutions it looks that I should choose naval architecture 20 years ago lol. Thanks for Your advice
Where can I get Neoship?
Sorry, Neoship is only available as a service that DMS offers. It isn't stable enough to offer for sale. This was a conscious tradeoff to maintain flexibility. I frequently need to adjust some of the settings to ensure stable operation for each new concept design. That's why i can only offer it as a service.
Where do i recognise that logo?
Edit: is that Carhartt?
How do you copywright or patent your deign before you give the plans to the ship yard
(NOT legal advice. I'm an engineer, not a lawyer.) In the US, copyright is automatically granted. No need to file anything. Although I do include a copyright statement on all drawings and reports, specifically so people can't claim lack of knowledge about the copyright.
But copyright only protects that individual drawing, not the entire design. Nothing to stop someone from using the drawing as inspiration and copying the good features. I have heard of companies patenting unique features of their design. But never the entire design. Intellectual property laws were never really intended for engineering in the US. There is no easy solution currently.
haha, during the whole video I was thinking: I'm pretty sure they start from the traditionnal hull shape used in the business area of the client, customize it and at most try 1 innovation point, and in the end that was exactly the message.
Full blue sky innovation of objects this size is probably managed in programes, that would involve universities, and a ton of models and uncertain outcomes. They would not get into such a pipeline when a client "just" wants a ship and has already chosen the name for it.
Very true. I meet a lot of Clients who just want a copy of the current hull in their business area. In fact, I know one firm that specialized for this. They just make tug designs, which are basically cut and paste engineering. Very little changes from version to the next.
The good news is that we don't often need to go to full university and research for true innovation. But it does take slightly more engineering. For example, I have one Client that wants to create a net zero ship with sails and a new fuel source. That is not a full research project, because we already have science for all the individual components. It's just a matter of mastering the mix.
A full research project would be if Raytheon wanted me to design a super-cavitating torpedo. The problem for that project would be that we can't predict torpedo guidance at super-cavitating speeds. (At least not that people admit publicly.) So in that case, we first need research to invent the science for predicting our problem before we can even solve it. Thankfully, very few people fall into the research category. You can achieve a lot with custom engineering.
@@DatawaveMarineSolutions
To be fair, 'traditional' designs may have incorporated considerable 'trial and error' over generations of their production when e.g. Bruce Bingham simply sketched out two derelict 1050s workboats and 'reverse engineered' them as the Flicka daysailer - which was said to be surprisingly performant, given their generous cabin...
“How does one start to design a ship?”
Guess
Playing some block-based space game and I hope to learn something here.
in reality its almost impossible to have LCB=LCG even if you manage to line LCB with LCG at first. it wşill change over time because of fuel consumption.
@@colaves1 which is not suitable especially in big ships. Fuel tanks need to be somewhere near engine room. Pumping the fuel from midship where the LCB and LCG are usually are (towards the aft most of the time) is an task of its own.
İts possible in smaller ships maybe upto 20m or so. in a bulk carrier its not the best possible way to place fuel tanks
I want to build latest fishing Boat that can't reach the speed 25 knots then above
Creative video, thanks for sharing it :)
Differential equations are fun.
😱😱😱
In the books Principles of Yacht Design by Lars and Rolf Larsson, use of Simpson's rule for the calculation of the hull's characteristics is shown. It was recommended to use a planimeter for the crossetions. This was for those without access to CAD.
@@shaider1982 yes, before computers, the methods used for integral estemation were quite clever. But in a world where butane lighters exist, theres no real sense in rubbing sticks together these days.
*I am only a 14 year old kid, and this video is very helpful for me. I would buy a blueprint paper and design the Titanic.*
I always wondered if it would be possible to scale down at least the overall shape of one of the classic Edwardian liners in a package that is roughly 80-100ft in length. ...with tweaks to make the design practical, of course. I just don't have the math background to actually run the numbers though!
How much change when you design a sailing ship?
About 15-20% different. The process is generally the same, just a few additions for structure and propulsion. Now we need to design a mast and sails, change the hull shape slightly. Same process, just different priorities.
But this becomes much more effort when designing a small sailing ship (anything under 40 ft. / 12 m.) On those, space is so limited, that you really need to consider the ergonomics of how someone will sit in the cockpit, how to arrange all the lines for easy access, how many winches will the ship have, etc. That human element adds a lot of effort when laying out the ship.
@@DatawaveMarineSolutions
"(...) more effort when designing a small sailing ship (...)"
I'd love to see a quantitative comparison between David Raison's Maxi 650 (in serial production by IDBMarine) and Janusz Madersky's Globe 580 (available as an assembly kit).
I can't even tell what length, I should look for when browsing for used boats (even 200 foot plus can be sailed, shorthanded, but I'm hardly independent if I can't even erect the mast, myself or require inboard engine maintenance - having _one_ spot to stand upright within a cabin would be nice, so would be a closed wet head)...
One could probably crank out regular videos on any ship, 'Yacht Monthly' comes up with - commenting on design choices...
Try The Nature of Boats by Dave Gerr
Gotta design with some SWAG (scientific wild-ass guess).
Can you design a ship in 3D?
I'm drawing up plans for a fictional ship and decided I wanted to try making an actual realistic plan of her. She's 47 meters wide by 352 meters long (roughly). The GRT I'm projecting is around 90-95,000 maybe even 100,000. In my fictional universe, she's drawn up in the mid-to-late 1920s and construction started sometime in like, 1928 or 1929. then the stock market thing happens and construction halts. The project resumes once funds are located and she's launched on 17, August 1934 (in lore). She has her maiden voyage in 1936 iirc. Its still a WIP. Her hull is 41 meters tall. with the supestructure, masts and stuff, she's around 170 something meters tall. Do I know if she'd actually work as a real ship? nope! but I certainly can theorise!
You can build a scale model and find out in a tub where the points of gravity would be. Current super container ships do have surprisingly tall loads on a completely flat - but wide - bottom hull.
Adjusting the 'beam' can possibly make the semi-Eiffel Tower bridge, plausible if all superstructure load is distributed, evenly...
Romans: 'We need a fleet ! There ! A Punic wreck ! Just imitate that shape - over and over, again...'
ok, so I am struggling, I want to design a ship with defense at all 360 degrees with main gun batteries and engines that look aesthetically pleasing and in my lore
It's a big question 😍☺☺☺☺
I am an outdated mechanical designer/engineer of heavy equipment than wants to build his own small light weight car topable boat. Who now works as a laborer because too many heavy equipment companies went out business. My brother a retired landscaper built a successful foamy row boat.( Constructed from closed celled styrofoam bought from a building supply store) I have watched several videos from creators that have constructed similar boats using poor man's fiberglass and construction foam. (burlap or an old bed sheet to replace the fiberglass and then exterior house paint to replace the epoxy) My nearest lake is 8 miles away, has a large surface area of water, and in many areas only has a 3 foot water depth. ( typical Midweastern USA lake) My first thought was a sail boat and a fising boat. Due to the shallow water depth, fishing is always better in the shallow water, and the fact that such shallow water can quickly develop rough water conditions, I have abandoned the sail boat concept and the flat a hull. ( a typical design for inand water boats) ( have been in a float bottomed John Boat in rough waters and they are hard to steer and required a lot of force to move them in rough water, and they have a terrible choppy ride.) I have now decided to build an axe bowed boat with side angles 20 or 25 ° on the bottom to get the boat to sit slightly lower in the water, because I want to make my own boat, and a 25 pound or under 2.5hp, 2 cycle motor. I want to add a splash or wash board on top of the front to keep the waves from washing water into the boat. I want some speed in my hull with rough water capability. ( a little of the best of both worlds) I don't see this type of construction on inland boats. I think that I am on the right track. Am I on the right track? Have used Excel to iterate other engineering problems and it works great even if you just do it by trial and error. Looks like you have a great concept.
Sounds like a V-shaped displacement hull, like motor boat designs (used to be made from aluminum) - yet, a fold-able multi-hull with austere Kayak like hull 'crawl cabins' would grant much stability without much draft (though would consume time to assemble and disassemble, each time)...
Architect student, still amazed about naval architect 😂
Chuck some giant airbags inside the cabin's, below the water line and above to stop the pollution of our oceans. Have a safe journey God bless
That's easey these days..go to computer put in tonnage and size , choose your bow and go from there.
The whole guessing the weight bit is fine until your designing an ocean liner. How much do the cabin furnishings weigh? No clue. How much does the loose cargo weigh? No clue. Take a blind guess and refine it later, then do the whole thing again until its right? Yes. Yes of course.
5:15 But Steel Is Heavier Than Feathers 😆
that's why you need more volume for the feathers
at least you understand engineering drawing and you know how to swim
Can you build me my ship 🙂
I Guess …🤔
Ndlogok mumet sirahku
Hello Nick. I suppose that your education has brought you to this point, propelling you to post your ambitions on youtube, and as you live and breathe today, you are still boiling down your hypothesis'. The point of this message-- could you be the one that creates the ultimate hull?
I think you are doing it wrong. your trying to avoid wasting time going down a lot of dead end roads , your behaving like a "professional" ever notice how professionals never seem to invent anything new ?
Try this instead , create a list called " The design requirements for this craft will be " and a second list called " Design priorities." and take your time (I often wake up in the middle of he night just to re adjust the priorities , getting your priorities right is the most important part).
When you have these two lists so you are happy with them THEN make your first rough drawing of a ship that will meet the requirements and priorities on your 2 lists.
In one of the replies, he does address 'mission analysis' and circumstantial 'restrictions' before proceeding toward weight estimates.