Happy new year. You can enjoy a video of ships climbing. kzbin.info/www/bejne/jYvSkneIo6dokLcsi=_C6m-iycSiuMaXFE philip

Well. I would both agree and disagree. Yes, any significant electric motor use is going to need generator. But other than that, for most people it can save a lot of money since for simple maneuvers you don't need to use fuel. Ofc, it does mean upfront cost of battery, but that battery capacity also means more luxuries and simplification/electrification of other devices and tasks. And in sailing, it means you can spare more effort on just that, sailing. Also electric motor is extremely reliable and space efficient. 3:11 I also think this chart is not very appropriate, you do not need equivalent energy in batteries, you want enough battery that you can bring operational costs of the boat down and use less fuel. You are always going to need fuel and generator on board, what you need to do is to find right balance. 3:29 I would also dispute complexity, batteries are not complicated, and electric motors are not either, so when you remove diesel motor, which is huge pain in the ass, and just add more batteries, which you already have, it reduces complexity. It also means removing fuel lines and stuff like that. All this is removing complexity. Other point is, while eco friendly is selling point, maybe bigger one is just lower fuel costs, lower risk due to potential contaminated fuel and just sense of independence this gives. And side/main benefit depending on person, naturally bigger battery capacity means being able to use higher wattage appliances and other devices longer without generator. But ultimately though, it all depends on your budget, way you want to sail etc. If you have decently sized boat, and you already want to have to have many comforts provided by electricity, it's probably worth it to just up capacity bit more for electric engine. Also it's nice to get regeneration when sailing. I'm talking about sailboats here. With motor yachts, unless you have something like cat with massive solar array, electric just doesn't make sense. Even then you do have to realize the limitations, but if you work around those, it's going to save a lot of money. Yes, batteries and electric motors are not some magic bullet, and they certainly can't replace need to carry fuel. But they don't have to be to give very clear benefits. Throwing out numbers is all well and good, but you have to place those in context. And I'm not even sure those are right, I'm not going to check, but just basics in the video are either misleading or wrong.

A great example of hydrofoils for your tutorial is spindrift2 kzbin.info/www/bejne/mGTddoR4j7Jkbdksi=5WRyohFXSuuQoEI- you can see the cantered foils on the armas and two under the main hull. Keep ypur great video coming. Regards Philip

I'm a science fiction author and actually have a scene in a novel set on Mars where some teens use a cotton towel soaked in water, then carried out through an airlock to the surface where the towel is quickly molded into shape and then freezes to serve as a temporary structural repair.

Merry Xmas - Inshallah I will build my all metal trimeran and we can meet one day

What I'm now wondering is how feasible would Pykrete ships (or heck, land bases) work for antarctic expeditions? Since it is already cold there already?

Very interesting analysis, thanks for sharing!

The solution is make the city a source of income. Video linked below. I have a patent for a wave powered water pump that serves 2 purposes. The first is to pump water to a higher location to produce hydro power to the floating city and the second is to run underwater pipe lines to sell that water pumping power to onshore hydro power plants! kzbin.info/www/bejne/nGbSnI2iptGmotksi=5rQWEjUVgU8zPsBh The math on the power output is mind boggling. Water at a higher location has a lot of value !

Hi nick. What health insurance do commercial ship crews use. Nomad capitalist has interesting comment on us health kzbin.info/www/bejne/iX3HmJebpZWJbMksi=Os8EEcfFx9QpBwzB 3:43

The big problem here is how to waterproof the engine ? 🙏🙏

Perhaps humanity needs to master this before attempting long term orbital colonies.

Didn't the Cutty Sark use a form of this advanced technology?

If i wanted to create a Very high ballard pull jet. By just using a ducted propeller with a nossel. Say a 24" prop reduced to a 18" nossel. I dont wasnt speed. 4knots is plenty. But i want to tow and i want it to be shallow draft. Like 12" shallow.

What I've never seen someone cover, and what no "Advert" ever goes into, is maintenance of these Sails. What if a sail fails in the extended position, who is going to (potentially) have to climb up the mast? What if the mast fails to retract in bad weather. Will there be extra crew requirements for ships with these sails installed, current crews are already suffering under minimum (aka maximum for the companies) crewing requirement and i can not imagine that these giant sails would not have strict and elaborate maintenance schedules.

Lily pad communities around short airstrips that enable hybrid electric short take-off and landing aircraft (see electra aerospace) to reach previously remote islands..?

Maybe some big omni directional windturbines (like the O-Wind generators). Connected to a 100.000 -1 mill. Kwh ( = 500 -5000 tons ? ) solid-state battery would be better ?. You could sail a straight line and "Wind-charge" while in habour.

Rizzlampa: sails by IKEA

that was the first thing that entered my mind when i saw it.. " how does that not just get pushed over?" except my thoughts went to some scissoring center pivot Xs between foil ribs ... that might be lighter, it might not, but either way; it's gotta be heavy enough, and that's heavy.

I like the new format, the stable camera etc. I wonder if these concepts will actually come to pass. Just looking at the visuals of the Michelin mast, they would need to redesign the ship entirely. No add ons or mods.

Always interesting

The first big question I have with those sails is that those cargo ships can't possibly have enough righting moment for it to scale up to the majority of the propulsive power even under the most favorable conditions without really screwing up the hydrodynamics, stability, or both. I'd also be curious how it compares to fletner rotors since those seem simpler, are also righting moment limited, and have been installed on a lot more ships. I think a much more interesting technology for wind-assisted propulsion in the long run is kite sails. They aren't righting moment limited the same way because they don't need a mast, so they can scale up to a much larger fraction of the ship's propulsion without adding back the stability and hydrodynamic issues of a traditional sailing ship. They also work for container ships because they don't need a clear deck. I guess the big advantage of wing sails over everything else is that they can incorporate large solar arrays to provide extra power since vertical solar panels are very effective at sea with all the light reflecting off the ocean surface.

I’d be very interested to see how much motive power could be generated from sail propulsion over integrating wind turbines with an existing diesel electric propulsion system. It must be easier to integrate a second power source into an existing electric system than running two separate propulsion systems by adding sails. Wind turbines also having the benefit of not caring about the angle of the wind to the direction of travel meaning less of a change in how the ship is to be managed and navigated. Afaik The main problem of fitting wind turbines to commercial ships is how to stow them out of the way during loading/unloading operations, but if inflatable telescopic masts and sails are a possible solution I’m certain that something similar could be produced for wind turbines.

about reefing... if you have a wing, instead of a sail, can't they just angle it so it stalls? You don't need to reduce sail area if you can just have the wing stall?

I really meant to point to these projects to see whether it is a hype...

I like how you visualized the Courant number

Great video on the advantages of a ketch (followtheboat sailing kzbin.info/www/bejne/l6W8i4eknrR8ZpYsi=UyqoQpd60R6lLpA4 and improved sailing kzbin.info/www/bejne/rKqqdIawpNd6gM0si=LWqYelsmpG6w7bzs) At the moment I am planning my own ketch as a stainless steel.trimeran. Nick from DMS marine did a great video on trimerans (kzbin.info/www/bejne/jZm5kn5tbpxqaM0si=jy7trSqJyzjsEu9Z) plus many other topics. Can you please look at my proposed sail plan and comment. The aim is to have my sails permentally up ether furlled or unfurlled so as to mimimise or eliminate the need to lugg specialty sails in out of below deck storage. Brian and Karen on Dallios have a great approach with everything controlled from the cockpit helm using electric winchs while keeping the helms person safe. Please check and improve on my sail plan. From the bow to the stern: 1. Genoa 2. Foreward Jib. 3. Rear Jib. 4. Fore mast main sail. 5. Staysail between the Fore mast and the Aft or Misen mast. 6. Aft or Misen mast sail. 7. Spanker Inner Jib sail. 8. Optional Spanker Outer or Aft Jib sail. Is it possible to have all sails unfurl upward to the top of the haliyard? The mailsail in the Harkin demonstration video furls into the mast (kzbin.info/www/bejne/jZm5kn5tbpxqaM0si=jy7trSqJyzjsEu9Z) Can this be made to furl upward from the boom along the mast? At the moment most vessels have jibs that go from the top of the haliyard to a clew on the deck. Could the jib be stored furled up between the mast and the clew withe jib unfurling upward along the main mast? Could the staysail be stored furled up between the top of fore mast and 90% of the way down the aft or mizen mast and also unfurl upward along the mizen mast? Thanks for your replies. Regards Philip

we are building a waterjet with this one 🔥🔥🔥

Hi Nick, I was waondering if there are ships or trimerans that sail by wire just like a modern jet where the plane is flown by a computer which takes input from the pilot but limits what he/she can do so the frame is not stressed. There was a story similar to the Americas Cup where a racing trimeran team flipped the vessel over. If there had been a sail by wire the computer could have limited the amount of sails etc as the stresses or the tilt angle became dangerous. For recovery the vessel could have had pneumatic acctuators slam shut external doors and hatches while inflating air bags on top of the main hull and retracting the masts and sails (alibarba sells telescopic masts). Regards Philip

A lot of information with very little visual detail.

When it came time to repower my Valiant 40 sailboat, I first looked at upgrading the original Westerbeke diesel to a Betamarine diesel but it would take at least 6 months toget the motor from the manufacturer and then 3 to 6 months to have someone install it at a total cost estimate of $38 to $42,000. 2023-2024 saw LiFePO4 cells drop drastically in price. One can DIY a 51.2 nominal voltage battery totalling 16kW for less than $3000. I was able to build an OceanVolt ServoProp 15 based system with 3 x 16kW batteries (48.2kW), doing all the work myself except for the hull glass work for converting from shaft to saildrive. The total cost was $57,426. I no longer need to do any maintenance except zincs or worry about bad fuel stalling me out (happened to me twice). Reduced weight by 592lb (full tank wt). There is no diesel/oil smell anymore. Motoring is completely quiet. Gained a large storage space under cockpit where fuel tank used to be. I never have to buy or treat fuel. My galley is 100% electric since I could get rid of propane. I can motor for over 8 hours at the same speed I used to on diesel before having to worry about battery. Best of all I get ~400W recharge while sailing 6.5kt. The ONLY benefit diesel power had was the ability to motor 400 miles on a tank and be able to fill the tank in 30 minutes. Now I can motor 50 miles and it takes all night to fill up but I have never in my life motored more than 50 miles in a day so it works out for me :)

Regarding your spreadsheet, I certainly hope you don't calculate like this as a professional marine consultant! First: You don't need a 10.4 kW e-motor to replace a 10.4 kW diesel. While the rated power of the diesel is it's max power, the rated power of an e-motor, is only the power it can do non-stop without overheating. Max power of an e-motor is far higher than it's rated power, but in both cases, max power is only useful for maneuvers. In fact 5-6 kW rated e-motor power will easily substitudes a 10.4 kW diesel, and it weighs less than 30 kg incl inverter. Second: How many sail boaters do 35.8 hours non-stop motoring? I think the longest non-stop motoring I've ever done in my 60 years sailboat career was 6 hours, and unless you are crossing an ocean (which you wouldn't do by constant motoring in a normal sailboat), you'll pass plenty opportunities for recharging on your way, let alone regen under sail and solar charging. Third: A modern quality 5,4 kWh LFP module weighs less than 40 kg, which means that 6 hours non-stop motoring at 4-5 kW (= the power applied by to the propeller shaft at cruising speed in a sailboat with a 14 hp diesel), only requires 5-6 such modules + 30 kg e-motor = 230- 270 kg --- which only adds about 1% to your weight fraction, compared to your diesel setup. Then ofcourse you loose the ability of 35 hours non-stop motoring, which very, very, VERY few sailboaters would ever do, but it's traded by so many more advantages, e.g.: 1) Comfort (no more noice and no more dirt and diesel smells in the cabin). 2) Virtually maintenance free (no frequent replacements of lubrication oil, filters, cooling liquids, hoses, through-hulls, V-belts, internal anodes, impellers, fuel lines etc...) 3) Increased maneuverbility (unlike diesel engines, e-motors provides instant torque!) 4) Reliability and redundancy (several battery modules in parallel) 5) Ability to regenerate under sail and turn both wind and sunshine into clean propulsion. 6) Every part of an electric drivetrain can be handled easily and manually as no component weighs more than 40 kg, each very simple to disconnect and carry out of the boat. 7) Design flexibily of being able to place the battery modules anywhere you find convenient in the boat and a motor unit that doesn't take more space than the gearbox in a diesel boat. The happiest moment of every sailboat journey is the moment you turn off the diesel!

❤

Surfing on a couch for the perfect outboard propulsion for a daysailer/pocket cruiser (what about a paddle ?)... I did wonder, however why navies (US Navy, Russian Navy - with around 16 remnant Soviet era units still in service) gave up on hydrofoils when they make their way into sail racing (fuel consumption is a factor when chasing speed, but then again, sometimes a short distance sprint is all it needs) - as if there were a plateau of diminishing returns in hydrodynamics...

Romans: 'We need a fleet ! There ! A Punic wreck ! Just imitate that shape - over and over, again...'

thank you

Thanks

Where to get neoship from?

I quit watching when you said that the electric set up is heavier than ICE setups. Big bias on your part!

heat collected from a shallow geodesic could be channeled into the depths via a ventilation system...and the same could collect rain water. but the problem with a very deep hyperbolic cone hull, would be in the construction phase. hyperbolic cones amplify sound ... I don't even know if a person could survive the SPL level created by concrete being poured into the cone hull.

negativity

If I was a sailor, I wouldn't care about the extra cost of a trimaran if it keeps the boat more steady and less likely to capsize. And you would think companies would consider the less likelihood of losing a ship and its cargo. Surprised this design isn't used more often.

It sounds like any ocean going vessel today should be a Trimaran. The huge monohull cargo ships, and the way railway containers are stacked so high on them, it really looks like they would capsize with just a moderate breeze. But somehow do not.

Thanks for the video. I guess it's safe to say the idea of a Catamaran style boat is due to the use of metals such as iron and aluminum in ship building. That the idea of steam bending wood to make a hull makes the catamaran idea not feasible? I'll have to check that out.

Fantastic topic. Something I have been searching for and haven't been able to find on KZbin. Very well explained.

Nick trying so hard to get Peter Thiel in his DMs

A fascinating concept. Along a similar line, there is a process of generating limestone-like structures known as electrified reefs using a metal mesh with a current to draw minerals out of the surrounding water. This structure can in turn be used to support colonies of various marine life. This could potentially provide both an anchoring point for seaweed as well as a more robust structure that could bridge the gap between purely biological and solid concrete. I'd be very curious to see what level of porosity is tolerable for a breakwater. I would expect that gaps significantly smaller than the wavelength should not be an issue, though I don't know the range of wavelengths that need to be blocked. All the same, it should be possible to get most of the benefit for a fraction of the mass/cost of a solid structure.

Wait. Kelp is attached to the seafloor. Surely that is a big reason for its wave damping properties? It essentially increases the flow resistance of the seafloor by greatly increasing surface area? So where are you going to anchor this kelp?

I wondered if you have considered the nature of wave energy? What it would take to interrupt, deflect, white-ant portions of that energy to reduce the wave's power as it approaches the area to be protected? A hint: The existence of a tidal level provides an opportunity to separate the top of the wave from the bottom. Headless waves will never forgive if you do, they might even come after your cats. Also, don't be so quick to dismiss legs if a breakwater can be made reliable. Currently working on a self-supporting design for 200,000 people, it also has an airport and green fields.

Fascinating

I saw a small floating city design once that looked like it would work, because it had a really deep, hyperbolic cone, hull. without breakwaters, it's much more vertical than how we tend to think of cities.