Showing all 82 replies.
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>>2044167
I think it's more related to operation constraints, the depth you need when not at speed, the safety/stability and the fact that load capacity is often more important than speed
It is cool though
>>2044167
I hate America right now and they did plenty of fucked up shit in the past
Fuck israel too and fuck these ghoulish degenerates that support those crimes against humanity unconditioinally
But especially in light of the Ukraine invasion by russia and the apologism that followed I am really tired of American diabolism
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>>2045984
USS Plainview was decommissioned in 1978. Someone bought it in hopes of scrapping and selling the aluminum hull, but they gave up. For the past 40 years it's been a wreck on the Washington side of the Columbia River. And the Washington ecology department is looking to scrap it themselves to clean up the river.
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>>2044074
To put it simply: you get the complexity and the maintenance of a plane with the brutal environment of the sea (plus salt).
I absolutely love hydrofoils but the material science just wasn't there at the time. Maybe in a couple of years...
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>>2044074
They only really work in dense archipelagoes with a lot of islands. Where going by slowboat is too time consuming, but helicopters/planes are inefficient (and take-off/landing consumes too much time as well given the short distances).
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>>2044074
Hobbled by the same thing as the Concorde: fuel costs. You have to burn a lot of paleozoic plankton to get a ship going fast enough to fly. It's just hard to get enough passenger volume to make it profitable. They also require relatively calm water, so their routes are limited.
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>>2044074
I remember watching those going to and from Victoria, BC on its way to Seattle in the late 70's/early 80's. It would clear the Inner Harbour and Odgen Point breakwater like a normal ship. Then when it was off Brotchie Ledge you could hear the engines rev up and as it gained speed quickly, it rose up out of the water and was gone! Impressive and fast. Very smooth even in the roughest conditions.
>The Island Jetfoil made waves on the Seattle–Victoria route during the summer of 1980. Designed for passenger comfort at speeds over 45 knots (83 km/h). For context, today’s Spirit of British Columbia with BC Ferries cruises steadily at about 20.6 knots, while Hullo’s vessels travel at a swift 38 knots.
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>>2046787
I think any niche hydrofoils wouldve filled have been taken over by those high speed catamarans which are about 85% as quick with about a tenth the complexity/operating costs/dredging requirements and other hurdles anons have listed ITT
All that said, if money and practicality were of no cosequence, for me its the Mountbatten class
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>>2051794
*crunch*
Not much different from being run over by a solid hull. The skirting is heavy and not soft and pliable. It'll smash you when it hits you. And the air pressure underneath would be slightly higher than the hull weight on the same area.
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>>2053115
NTA, but you are largely right IMO. That being said, the process of the skirt needing to ride over you is probably going to be a lot rougher than you are estimating it. If the craft needs to "pitch up" to get over top of you, then a lot more pressure is going to be locally present there.
Like a book has a certain pressure to it lying flat, but if you prop up one corner, there's now going to be a lot more pressure on that corner and the opposite edge.
Even if the hovercraft can, eventually, equalize the pressure across the entire bottom, there's going to be a disequilibrium at the moment when the hull's momentum starts deflecting.
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>>2053115
The same amount of pressure is needed to support the weight of the craft. Figure out the weight of the ship and devide it for the square inch. You'll have your answer. Mass doesn't magically disappear.
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>>2053115
true but those inflatable skirts are in fact inflated and quite hard even though they seem to wobble and move a bunch when seen from far away. people have died just getting hit by RHIBs, a hovercraft would smash you up real good well before having to worry about the pressurized area underneath
>>2047789
from what ive read it's more that they aren't operable except in sea state 0. most areas of the world where you want super fast sealift are also places that have waves and shit. ships already cost a fuckton in fuel (and other supplies for feeding it and its crew) but afaik the fuel costs aren't so insanely higher that it's a more limiting factor than the influence of posiedon making the water not flat sometimes
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>>2055476
i mean, yes, it wasn't a state before, but it is a state now, with its own laws, currency, ruling class, people who would rather be who they are now instead of joining any of their neighbors, and at this point, more than a full genreation of people who were never anything but ukrainians. it's not as severe as israel, if you remove israel's borders all hell will immediately break loose because they are surrounded by fundamental enemies who want them dead, whereas, as you said, russians, ukrainians and belarussians are pretty much the same mixed soviet remnants with state-imposed national identity and would eventually come to peace if told to mingle (though 50s germany syndrome will persist for a while for both sides, unless you remove borders 10 years ago); but nevertheless, they are an independent state.
and if anything, bombing something that you don't even consider independent from yourself is even less excusable than bombing an independent state.
uuuuh boats i guess?
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>>2055513
i think secessionists are individually stupid but are still based for trying to secure their freedom at all, whatever freedom looks like to them. power to them but i'll still call them retards even if they win much like i call actual recognized nations retarded already
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>>2055545
quite the contrary, he knows exactly what he's doing. a strong leader needs an enemy to validate their strength and unite simple people under him, and in absence of one, they have to create one. it's a country of cattle, ran by a mastermind.
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I rode one back from Yakushima to Japan mainland and honestly it sucked. Like a fucking aeroplane, can’t go outside, just sit in your seat and get blasted by adverts from the TV goy. The car ferry I took going there was way more cozy, huge decks to wander around, sleeping mat areas, smoking deck, restaurant, civilisation.
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>>2055476
They were a nation, though, separate from Russians. When the USSR dissolved they asked for independence and got it, though Russia gerrymandered the final borders to have a sizeable contingent of ethnic Russians inside the borders, hoping to ensure Russian dominance of Ukrainian government. That left a messy situation even before you consider the CIA democracy cult's plan to turn Ukraine into an international money laundering hub.
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>>2059590
bullshit
well, not entirely, but this is turning a fly into an elephant
nation-wise, saying "ukraine was a nation separate from russians" in context of ussr (and russian empire prior to that too) is akin to saying "texas is a separate nation from the united states". they are distinct if you average them out, texas is not california and not wisconsin, but compared to neighboring states like new mexico it's a gradient rather than a hard cutoff, and the same is the case with russia and ukraine. no matter how you cut the jib, you'd end up with texans in new mexico and new mexicans in texas, and that shouldn't have been a problem. at least for as long as it's not regular mexicans in texas.
ethnicity-wise, again, you might as well say ethnic americans, same kinda melting pot. for some reason all russians get the same hate nowadays, despite a lot of them not being ethnically slavic in the slightest- be it people from republics that split off like azerbaijan (look at the list of richest people in russia, you'll find a few), people who stayed within russia as distinctly not russians like tatars and chechens, or even numerous misc minorities like jews and koreans. don't diss on russian koreans, korean carrot is the shit.
if you meant slavic russians in particular, then potato potato. both them and ukraininans stem from the same kievan rus that expanded, became too big, fell apart, got MONGOL'd, got un-MONGOL'd, reassembled back into the megazord, went to space, returned and fell apart again. like, sure, you might not have liked to be the left leg, but don't pretend you weren't a part of it. and definitely don't go pissing in torso's boots just to spite him, at least not before you actually move out like azerbaijan moved out with turkey, you'll be smelling those boots from the top bunk too.
eeeh uhh
i wonder why there are no hydrofoiling seaplanes. except for this thing, but it's a silly all-electric investorbait, and seems to be vaporware too
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>>2059698
they just don't consider it a separate language lol, their cowboy yankee yapping is sometimes as undecipherable to an english speaker as the worst cases of scottish accent. for me as an esl, at least.
ukrainian is indeed a bit beyond just an accent, but for the most part it's just russian that's trailing a few patches behind. it retained (and added) a bunch of unique words that russian instead nicked from other languages over the last few centuries, and it also kept its sound closer to old russian; but at the same time it also lacks some optimisations that russian lanugage has made to be less of "every rule has a list of exceptions and every exception has its own exception" (and it's still very much that, don't learn those languages, you will suffer). russian and ukrainian speakers can easily understand each other for the most part, and the rest of the meaning can be got out of context. out of all post-soviet republics' languages, only belorussian comes as close.
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Cos PWCs are cheaper and more fun (they're like the motorcycles of the waterways)
https://www.youtube.com/watch?v=7_7xc2Lvun0
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>>2044074
They are in sailing, they have taken over in racing and the advances in tech are going to start trickling into cruising in the coming decades. It is kind of amazing how quickly the tech has developed, wasn't that long ago that the idea was a pipe dream and we were struggling to get little lightweight high performance dinghies out of the water and now we have people doing single handed non-stop circumnavigations in 64 days in the semi-foiling IMOCA 60s, a month faster than two man crews could manage in the previous generation non-foiling IMOCA 60s and over 9 months faster than the winner of the first non-stop solo round the world race 50 years prior.
It wasn't even 20 years ago that Hydroptère (picrel) proved it was viable and could scale up, a proper ocean going boat that could carry its crew across oceans broke 100kph and records set by tiny speed machines.
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The IMOCA 60s do a pretty good job of getting out of the water for a semi-foiler and something which could be turned into a proper cruiser.
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>>2044074
They are abominations. It's that simple. A boat is not meant to fly. Ships are supposed to float on the water, not above the water. This paradox of their operation frightens and terrifies people, even if only at a subconscious level. You know it's wrong. It's like watching a dog walk on it's hind legs for an extended period of time. You know that if a dog is walking on two legs like a person, it's likely because it has been trained to do that with merciless, abusive beatings.
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>>2044167
America fielded them in the Navy. As far as I'm aware the Russians did not. Ultimately the cost to operate it did not justify it's advantages. If the soviets had started fielding them we probably would have kept ours.
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>>2044074
Square cubed law prohibits scaling to multi kilotonne sizes. Bad weather (any sea) would require a tens of kilotonne scale, and likely need an unfathomably strong hull to resist constant wave action hitting the hull at speed.
Worse, cavitation of the hydrofoil onsets around 50knots, destroying L/D; not much faster than a highspeed displacement hull.
It’s disappointing.
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>>2072101
They chew through fuel at 3 times the rate of other ships, which is their only real operational disadvantage.
Aside from top speed, their other advantage that doesn't get discussed much is that they can lean into turns so their maneuvering circle is a lot smaller than ships in the same displacement class.
The Navy wanted to decommission their hydroplane cruisers primarily because the role they ended up in (drug boat interception) is something they wanted to get out of. So they invented a lot of technical and operational reasons why they didn't want to keep their fleet operational.
It was all an indirect excuse to try to push that specific job onto the Coast Guard.
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I drew a boat that has a bilge keel with winglets, elevators, 3 rudders with a center to get prop wash for turning at stop, and a M bow that blends with the bilge keel.
The idea is to get a semi-displacement hull that can plane past hull speed at like 15 knots. Bermuda sloop with a genoa for solo sailing capability. I would also have electrical winches for auto-pilot
Would it work? I don't know. Drawing is incomplete cause I need to learn all the parts of sail and lines, and layouts.
But the keel would be filled with foam to decrease displacement and so would the keel canards, Also the boat could rest on it's keel at low tide so it would need to be structurally strong like an arch to support 5,000 lbs. I would have ballast above that and use a double hull construction where the inside hull has access panels and filled with foam.
I want a ocean voyaging sail boat that can sail itself autonomously and do so quickly.