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DMS | Marine Consultant
United States
Registrace 29. 01. 2008
Because boats are awesome! This channel focuses on all things related to ship science and naval architecture. From rules, to science, to common mistakes. Everything here works towards the goal of all naval architects: ships that come home safe.
Pykrete on Other Planets?
An epilogue to the video on Project Habbakuk and Pykrete. We discovered that Pykrete isn't suitable for use on Earth. The temperatures were just too hot. But what about other planets? Can we use Pykrete as a building material for in-situ resources to construct bases on other planets?
View more tips and helpful articles at www.dmsonline.us/
References
[1] L. Cross, Code Name Habbakuk: A Secret Ship Made of Ice, Vancouver, CA: Heritage Publishing House, 2012.
[2] Discovery, "Mythbusters - Pie-Crete," CZcams, 27 Apr 2009. [Online]. Available: czcams.com/video/UMKis4FPykw/video.html. [Accessed 15 Mar 2023].
[3] CZcams Creator, "Mythbusters - Newspaper Boat," CZcams, 16 Apr 2009. [Online]. Available: czcams.com/video/eCszy7mQye8/video.html. [Accessed 16 Mar 2023].
[4] Wikipedia Authors, "Pykrete," Wikipedia, 13 Jan 2023. [Online]. Available: en.wikipedia.org/wiki/Pykrete. [Accessed 15 Mar 2023].
[5] "Pykrete - Experimental Ice Ships in the Rockies," Combined Operations, [Online]. Available: www.combinedops.com/Pykrete.htm. [Accessed 15 Mar 2023].
[6] RealLifeLore, "The Insane Plan to Build an Aircraft Carrier Out of Ice," CZcams, 23 Mar 2019. [Online]. Available: czcams.com/video/CF9af8AtxLY/video.html. [Accessed 15 Mar 2023].
[7] Wikipedia Authors, "Scale model of the European Moon Village concept," Wikimedia Commons, 24 Feb 2019. [Online]. Available: commons.wikimedia.org/wiki/File:Scale_model_of_the_European_Moon_Village_concept.jpg. [Accessed 17 Mar 2023].
View more tips and helpful articles at www.dmsonline.us/
References
[1] L. Cross, Code Name Habbakuk: A Secret Ship Made of Ice, Vancouver, CA: Heritage Publishing House, 2012.
[2] Discovery, "Mythbusters - Pie-Crete," CZcams, 27 Apr 2009. [Online]. Available: czcams.com/video/UMKis4FPykw/video.html. [Accessed 15 Mar 2023].
[3] CZcams Creator, "Mythbusters - Newspaper Boat," CZcams, 16 Apr 2009. [Online]. Available: czcams.com/video/eCszy7mQye8/video.html. [Accessed 16 Mar 2023].
[4] Wikipedia Authors, "Pykrete," Wikipedia, 13 Jan 2023. [Online]. Available: en.wikipedia.org/wiki/Pykrete. [Accessed 15 Mar 2023].
[5] "Pykrete - Experimental Ice Ships in the Rockies," Combined Operations, [Online]. Available: www.combinedops.com/Pykrete.htm. [Accessed 15 Mar 2023].
[6] RealLifeLore, "The Insane Plan to Build an Aircraft Carrier Out of Ice," CZcams, 23 Mar 2019. [Online]. Available: czcams.com/video/CF9af8AtxLY/video.html. [Accessed 15 Mar 2023].
[7] Wikipedia Authors, "Scale model of the European Moon Village concept," Wikimedia Commons, 24 Feb 2019. [Online]. Available: commons.wikimedia.org/wiki/File:Scale_model_of_the_European_Moon_Village_concept.jpg. [Accessed 17 Mar 2023].
zhlédnutí: 301
Video
Pykrete: Build a Ship FROM Ice!?
zhlédnutí 830Před 21 dnem
Pykrete, the revolutionary composite made with ice, and a potential building material during World War II. Project Habbakuk planned to use Pykrete as part of an ambitious plan to build the largest aircraft carrier ever, all held together with ice. Learn why this wasn’t as crazy as it sounds. View more tips and helpful articles at www.dmsonline.us/ References [1] L. Cross, Code Name Habbakuk: A ...
Free Fuel? Wind Propulsion for Cargo Ships
zhlédnutí 1KPřed měsícem
I react to a video on a new concept for shipping: wind assisted propulsion for cargo ships. References: [1] Fully Charged Show. "Will Wind Power the Future of Shipping." CZcams. Sep 20, 2022. czcams.com/video/ljSbm-Vpsq8/video.htmlsi=D4yfyJOmhVu37x2W View more tips and helpful articles at www.dmsonline.us/
Strong as Ice: Designing Icebreaker Hull Structure
zhlédnutí 1,5KPřed 2 měsíci
With icebreakers, the hull becomes the primary tool. The massive wedge we use to crack open mountains. All this, despite it being a hollow tin can, with an average density lighter than the very ice it cracks through. How to build an unbreakable hull? View more tips and helpful articles at www.dmsonline.us/ References [1] Wikipedia Authors, "Polar Class," Wikipedia, 15 Dec 2022. [Online]. Availa...
How to Beat the Arctic: Polar Class Icebreakers
zhlédnutí 1,4KPřed 4 měsíci
The Polar regions of our planet are not pleasant. They demand uncompromising strength, vast reserves of energy, and flexibility to adapt with each challenge. To meet these demands, Polar class icebreakers go beyond anything we expect for a normal ship. How do they voyage into vast desolate regions and return home safe? View more tips and helpful articles at www.dmsonline.us/ References [1] Fron...
Toughest Gearbox in the World?
zhlédnutí 1,3KPřed 5 měsíci
Just like the transmission on your car, a ship needs a gearbox. Only we pump a LOT more power through these gearboxes. On ships, the gear box also faces the challenge of combining multiple engines into a single propeller shaft. Discover some details of how RENK does this. View more tips and helpful articles at www.dmsonline.us/
A Giant Engine Wrapped In a Tank: Icebreaker Propulsion
zhlédnutí 2,2KPřed 6 měsíci
A giant engine, set in the hull of a tank. That is an icebreaker. With massive electric motors. With cutting edge propeller that allow the ship to spin on a dime. Looking at icebreakers, propulsion is more than just a massive power plant. It’s smart power. View more tips and helpful articles at www.dmsonline.us/ References [1] S. L. Planisek, Icebreaker Mackinaw, 2nd. Edition, Mackinaw City, MI...
Big Electric Propulsion: What Goes Into It?
zhlédnutí 2,9KPřed 7 měsíci
I review the systems that go into electric propulsion for a large ship. It takes more than just batteries and a motor. Discover the other items we need. View more tips and helpful articles at www.dmsonline.us/
How to Collide with Ice . . . and Survive?
zhlédnutí 3,1KPřed 8 měsíci
Ice breakers drive into the ice pack and crack the ice, right? Ships this size involve a little more complexity. The trick isn’t breaking the ice. The trick is intentionally colliding your vessel . . . and surviving. This video reviews basic operating principles for icebreakers. View more tips and helpful articles at www.dmsonline.us/ References [1] S. Kivimaa and P. Kosloff, "Compressive Stren...
How Can You Merge Charging On Your Yacht?
zhlédnutí 1,1KPřed rokem
Electric power entices us with its flexibility and adaptability. And that extends to our charging sources. We gain the ability to recharge our batteries from nearly any source, assuming everything works together. Discover the critical issues to combine multiple charging sources for electric propulsion. View more tips and helpful articles at www.dmsonline.us/ Check out Pacific Yacht Systems: czc...
Which Battery is Best for Your Yacht?
zhlédnutí 7KPřed rokem
How to select the right battery for an electric yacht? We electric propulsion normally requires a LOT of batteries, which makes them a sizeable investment. So you need to pick the right one. How to choose? DMS reviews major battery chemistries and compares your options. View more tips and helpful articles at www.dmsonline.us/ Check out Pacific Yacht Systems: czcams.com/users/PacificYachtSystems...
Who is Thrustmaster?
zhlédnutí 1,5KPřed rokem
Who is Thrustmaster? When evaluating a vendor, listen to everything they don’t say in addition to the sales pitch. In this video, I highlight the important points presented by Thrustmaster of Texas. Can you catch all the critical details of this video? View more tips and helpful articles at www.dmsonline.us/ References [1] ThrustMaster Of Texas, "Thrustmaster Overview," CZcams, 30 Jul 2019. [On...
How Electric Propulsion Keeps You Safe: Emergency Yacht Electric
zhlédnutí 1,9KPřed rokem
How Electric Propulsion Keeps You Safe: Emergency Yacht Electric
5 Myths with Electric Propulsion: Don't Believe Marketing
zhlédnutí 10KPřed rokem
5 Myths with Electric Propulsion: Don't Believe Marketing
How to Design a Ship: Creating a General Arrangement
zhlédnutí 67KPřed rokem
How to Design a Ship: Creating a General Arrangement
Lying with Numbers: Science and Statistics
zhlédnutí 1,3KPřed 2 lety
Lying with Numbers: Science and Statistics
The Value of Life: Engineering Risk Analysis
zhlédnutí 1,4KPřed 2 lety
The Value of Life: Engineering Risk Analysis
What Separates a Propeller from a Waterjet?
zhlédnutí 10KPřed 2 lety
What Separates a Propeller from a Waterjet?
Stability Letters Explained: READ The MANUAL!
zhlédnutí 5KPřed 2 lety
Stability Letters Explained: READ The MANUAL!
How to SAFELY Put Cranes on Ships: Marine Crane Integration
zhlédnutí 41KPřed 2 lety
How to SAFELY Put Cranes on Ships: Marine Crane Integration
STRENGTH And STIFFNESS: Design of Structural Foundations
zhlédnutí 8KPřed 2 lety
STRENGTH And STIFFNESS: Design of Structural Foundations
SEAKEEPING 5: Example of Motion Control
zhlédnutí 2,1KPřed 3 lety
SEAKEEPING 5: Example of Motion Control
SEAKEEPING 3: Fluid Structure Interaction
zhlédnutí 3,3KPřed 3 lety
SEAKEEPING 3: Fluid Structure Interaction
The comparison of power between electric and ice is nowhere near as simple as how you put it. Torque curves are more important to look at than overall power when coming to boat propulsion. You can technically move a laden cargo container with a 1hp engine if the water is still. Electric motors are peak torque right from the beginning and drop off after a rated rpm. Ice engines are the reverse. This means that if you spec the right motor, you can use a lower powered electric motor than engine. How lower? Depends on the motor. I'm looking at replacing 2x225hp diesel engines. 225hp is 157kw. But I have found a 75kw motor that produces the same torque at a higher rpm as the engine it will be replacing.
6000 plus KG in batteries........... BS
Most people don't want to produce less co2 they just want to look like they produce less co2 so they can complain that no one else cares as much as they do. It's virtue signaling and boring. Don't get me wrong, I don't want to harm the environment any more than is necessary for optimal efficiency, it saves money, and wears less on your machinery, but also does less to harm the environment.
Not bad. Ice propeller interaction could compliment this video and your cavitation video.
Water is a excellent radiation shielding material. The Earth magnetosphere and atmosphere protect us from most of the radiation from the sun and other sources. The problem is it weighs a lot.
Hope you can collab with Drach or HI Sutton in the future.
The biggest problem with pykrete on other worlds, especially the Moon and Mars is that while it may not melt, it will sublimate. And that still assumes you have a good fibrous material because wood isn't very common on other planets.
I love your videos, nothing else fuels my fantasies about bulding a self-sufficient sailboat to live and chill in those conditions, like these videos!
But on the other planets there are no wooden sawdust. So pykrete as such is not an option. However it is possible to use other materials as fiber-reinforcement. For example a basalt fiber.
In Titan it could work, the mountains are made from water there
Hi Nick I was watch this flight simulator for an airbus czcams.com/video/yCmYhuhwTV4/video.htmlsi=BPBpiin92XImfcUn Have you seen or know someone who has done a movie on the flight management system of a seaplane that can land or take of from either land or water? What are the extensions that are required to the flight management software? What are the extensions required for an ekoplane which uses ground effect? I have seen reports ekoplanes can fly at 300 to 400 knots (faster than the average yatch). The video also shows that the helm has 2 axes of rotation unlike a normal yatch. Regards Philip
Have anyone tested a combination of water jet propulsion and propellers? For example waterjet engine in the middle and two IPS engines on each side? You could program the waterjet to turn off between 8-25 knots for efficiancy
This is absolute bogus.
I remember there an old saying - "best Bluewater designs start with worst case scenario, the boat upside-down in the Ocean" ..... this is an issue for Catamarans and Trimarans
Where is this diffuser is located? At the entrance of duct? Or inside the duct? Or at its outer borders?
@@whyMDO The diffuser is located just after the impeller. It includes the stator vanes that straighten the flow.
@@DatawaveMarineSolutions , thank you! Does this mean, that stator and diffuser are the same thing? I would really like to distinguish the difference between theses two terms/entities.
Impressive presentation. You're the expert, which I certainly am not, but I don't think you really answered the question of why trimarans today are relatively unpopular compared to cats.
When a jet is working, its geometry is tilted, and so water comes into a chamber straight, and so exhausted with some angle into a surface. So, is it above or below a water line initially no more maters then imho.
When doing a side plan, front plan, and back plan of a ship. I noticed the vertical going from the bottom of the ship to the top of the ship. What is the measurement between line and how is that determined to help make the 3d model
Excellent presentation. Thank you.
It was only a Churchillian obsession. The brainstormer managed to get his ideea to Churchill who got mesmerised by it.
Refrigeration? Refrigeration? Refrigeration?
Im from wyoming -15C isn't even cold. I'm also an hvac tech so if anyone wants to bankroll a pykrete boat im down
Don't fight nature: I guess that means we won't be seeing Sodium hulls? :D
At least, not for very long. 🙂
LOL. Dr. Alexander Clarke and Drachinifel have both covered the plan. Lots of naval history folks know the story.
Pycrete is one of my favorite crazy historical footnotes. I'm actually dropping a reference to it in a novel I'm writing now.
I would like to see a project now!!
I'm subscribed!
Nobody is gonna burn 36 hours at wide open throttle. You are gonna burn your engine. Compare both at 3-5 kw for 12 hours and you'll see
U WAS an little wannabe on a ship and belive you know it all. From 1 ship of your learning. All ur info gat loaded down from DARKWEB #clown
Scamer ladyboy scam you for get shaty profucts
It seems like most comments here are referring to blow boats. Every blow boater I know brags that he isn't burdened by fuel range or mechanical failure (as they repair a mast, sail, or rigging from storm damage) so why is it you all seem so concerned about propulsion? You say you don't need it but you act like you can't live without it. No way on Gods green earth that I would attempt to cross the Gulf Of Mexico or even Lake Michigan with only battery power. No mater what kind of batteries and on top of that I would feel very much safer sleeping on top of a tank of gasoline than the type of batteries needed for this type of operation namely lithium. A pontoon boat with electric power on a small lake or pond? Sure! The amount and size of batteries for this could be setup to easily scuttle them if needed. It would be fun and advantageous for just putting around and just cruising and socializing. No mater what many of you think electric cars have major problems and putting those problems on a large pleasure boat would be problematic at best and possibly life threatening in several different ways.
They face all the same reasons the world stopped using wind propulsion. Sea states above 5, doldrums, slow speeds, and hurricane avoidance to name just a few. It's not that we can't design/build a sailing ship, it is that we can't make one with the same capabilities as a modern-day diesel-fueled or nuclear ship of any significant displacement. Sure, build them light, yes, but, at some point I see them restricted to low deadweight capacity. And that means world trade and shipping companies would be taking a big hit in its industry and we all know what happens to the world when that happens. The question is, does physics support the idea that wind propulsion maintains the same capabilities as modern ships? I doubt physics today allows us to build a sailing ship that can maintain a steady 22 knots across the ocean unless it is a hybrid. Nevertheless, give it a shot but, when it comes to money, money will win.
I have a dream to build a hybrid, foiled PWC. Amazing to have access to this sort of education.
Surge stability seems worth noting as a theoretical lesson but it’s hard to fathom when that would ever become an issue.
nice
I would say the words myth and lies are unnecessarily negative and click bait. For example:It should be pretty clear that „peak power „ is something different than „continuous power „ and the words are pretty self explanatory. Second point about range: We own a sailboat in the Bay Area. With our diesel engine we could motor days on end. Every three month or so we fill up on diesel because our gauge seems unreliable. There have been instances where I went to the gas station and filled up one gallon. For our boat and use you could argue that our diesel system / tank is mismatched to our use. An electric system with a range of 40 miles would be more than enough including safety range. This evaluation is off course personal but I think it would apply to most sail bouts in the San Francisco bay. I crossed the pacific ones and on my trip to the Galapagos was becalmed for a week.There it was great to be able to motor through this zone. But to go slow in a becalmed area could also be an acceptable option to extend electric range. Every oil change I deal with this toxic sludge. Even drops of it can contaminate large amounts of water. That doesn’t fit at all to the sport of sailing to me.
great channel
Thank you, amazing video and delivery! Has anyone designed a medium sized PC2 sailboat, with keel and all? One which wouldn't mind being frozen and continue as if nothing happened in the spring, provided there's enough food and fuel onboard.
@@lamarrrrr not that I know of. Fuel storage would be a challenge. For safety, you need six months of food. That's a lot of storage.
@@DatawaveMarineSolutions The grandfathers did it on carbon foam boats (aka wood), I'm sure it's possible to pack enough food for 1-2 people into a 60-footer, in our age of automation.
1. the aeroplane Lancaster have skot and stringlers aligned 45 degree, the roder and highroder screv the rear end of the plane. You have propellerblade and roder also. 2. You use I or H steel, what about J steel, lower weight is the result. 3. Thank you.😊
ان فديوهاتك والمعلومات مفيده جدا ... شكرا لك على مجهودك
What a joke maybe a year ago this made sense but now things are so much better and in another year they'll be way better
Nope!
Sailing ships have a lot of torsional stress because there's a twisting moment in the frame where the mast is attached. For modern ships to have sufficient torsional strength will likely require an extensive redesign versus what's built today possibly including hull shape changes and diagonal stringers.
Hydrodynamics and hull design, performance dynamics matters but what about this coming category, solar powered boating? Slower and efficient hull design matter for unlimited travel, what should an electric boat buyers look for? If i had to guess, i’d say a sailboat hull without a keel and a plumb bow, but i’m neither a boat architect and not a boat owner.
For solar power, you need a catamaran hull, intended for a sailboat. Preferably one of the high performance catamarans intended for higher speeds. They achieve higher speeds with really low hull resistance. Unfortunately, with current solar technology, you need a solar panel area larger than the boat deck area. Technically possible, but not easy. Unfortunately, it takes a lot of power to move through the water, even at slow speeds.
@@DatawaveMarineSolutionsthanks for the quick reply. Honestly i thought that was a lazy answer. Solar energy turning a propeller should do “something” so i wonder just how inefficient would it be. Continuing, i found a regular guy with a 1981 bayliner 245, with 2 minn-kota electric motors, 5000 lb power boat (monohull), added two solar panel and, two electric motors and now gets 4-5 k unlimited range (max speed is higher) without lowering the capacity of the 8 marine batteries. This is without your level of expertise. I’m not a “boater” although i still hope to be despite me being 75 (code for too old to build a solar boat). So i wonder, if that garage mechanic could do that with $500, what could a naval architect do if he put his mind to it?
Nobody considers pure EV ships as of 2024. I was thinking about hybrids like Diesel Electric trains which are efficient.
Electric propulsion is much more reliable and requires almost no maintenance.
You have been drinking the cool Aid!
Well, the performance and energy density of LiFePO4 is only about a third to a quarter that of the leading LCA batteries. This is why practically ZERO electric cars use LFP batteries. This is also why diesel-electric submarines looking for an all electric alternative to Air Independent Propulsion (eg. the JMSDF Oryu and Taigei classes) do not use LFP batteries in spite of their paramount interest in safety. High energy Lithium (everything from LCO to LCA) can be safe if there is a proper charge/discharge management circuit and LIQUID COOLING of the cells. Typically, water bladders (Tesla) or channels (most other EVs with larger format prismatics) between cell banks circulated to a radiator. The key here is that battery should be purchased as a certified SYSTEM with integrated charge and cooling management, rather than as piece meal cells and controllers. If that is too difficult, consider off-the-shelf integrated terrestrial or adapting an existing automotive solution. These go up to about 100~200 kWh. If you need more than that, you probably have a superyacht and you can afford to hire and engineering firm!
Drydock with sails. Ship would exit port by tug boat, be picked up by drydock with sails,be delivered to tug boats at new port. Drydock would stay in the ocean and be resupplied by tender.
@@mudball47 definitely an interesting idea. I have seen work on similar concepts. The main problem with a "drydock" concept is planning and logistics. I previously worked on an ocean going drydock. We call them semi-submersibles. And there was nothing simple about lifting a ship. We planned it months in advance. Good idea, but needs some refinement. 👍
Ships use kite long time
Hi dont gat a clue for 100 fot and down
Kite
Hi is so dumb i belive hi is one of thos who cant afford real bstterys
You apparently have no experience around water, boats, and electricity. Specifically salt water. Ships are one thing. They use generator power over battery power and have full 24/7 maintenance crews. Ships electrical systems are generally sealed off much better than small boats from the elements. Small boats and pleasure boats owned by people who allow costs and expenditures to override maintenance, safety, and common sense is another thing. Too many do it your selfers with a CZcams education about whatever they attempt to do outside of their wheel house create dangerous problems. Even electricians tend to use what they know about building wiring and procedures which can have a very negative outcome on a pleasure boat by using wire nuts, solid wire, and non tinned wire amongst other practices. People get hurt and die every year do to the DIY guy that doesn't take the time to learn why certain things on boats are done much differently than autos. Many more boats blow up and burn than cars for reasons I just mentioned.