Corea's touring group was all sourced from Scientologists. It allowed him and the church to manipulate his staff. A colleague of mine helped on an overseas tour and accidentally incurred a $18,000 cell phone bill (international roaming charges out the wazoo.)
They dumped her when she complained, and found another church member to fill in. An actual tour manager would have cost more money and would have had a contract to get expenses like that paid.
I'm surprised about the relative space. I once toured a Los Angeles-class sub (sorry, no photos) and I never felt I had enough headroom. Seeing all that open space in "workout area" and the "lounge area" and a lot of headroom was very strange.
The Russian nuclear submarines are just crazy big compared to the American ones (or anything made by anyone else for that matter)
Typhoon class has a displacement of 48000 tons.
Los Angeles class has displacement of 6927 tons. Typhoon class is a bit under 7 times bigger. Even the largest American sub (Ohio class) is still less then half the size of a Typhoon (the largest submarines ever built) at 18750 tons
edit: As a side not Russians have mainly moved away from the old Typhoon and replaced it with Borei class which is half the size (24000 tons). Only 1 Typhoon class sub is still in active service.
The Japanese I-400-class submarines/submersible aircraft carriers, which I believe are still the largest diesel submarines built, were under 7000 tons.
> which I believe are still the largest diesel submarines built
According to the internet you seem to be right, the Qing-class gets very close but not quite there: wiki lists 6628t, versus 6670t for the for the I-400.
Typhoon was made from two two parallel full length pressure hulls and three smaller pressure hulls (and missiles tubes ) between them inside one outer hull.
Attack submarines are much smaller than missile subs. I don't understand exactly why this is and what the trade offs are here - manoeuvrability, cost? They seem to need approximately the same size crew of 100-150.
The closer comparison would be to the US Ohio-class missile sub, which is 3x the size of the LA class with the same complement.
> Attack submarines are much smaller than missile subs. I don't understand exactly why this is
SLBM are big, a Trident II is 13.6m long and 2.11m wide[0] and Ohios need to fit them straight up plus the hull, so we're talking 14m moulded depth or so (excluding the sail), and a pretty similar beam, at which point… you just have a big sub, because it can't exactly be a ball: you need to fit 12 Tridents in a row, plus the reactor, engine, crew compartments, passages for the crew to move around, torpedo tubes, and enough stores to last for literally months.
Attack subs can have vertically mounted cruise missiles but those are puny compared to an SLBM, a Tomahawk is 6.25m long with booster[1]: an Ohio-class carries 24 Tridents in SSBN configuration, if converted to SSGN it carries 154 tomahawks.
Los Angeles carries 37, Seawolf carries 50 (and on both this competes with torpedoes and anti-ship missiles, on an Ohio you get 24 tridents or 154 tomahawks plus a dozen torpedoes or anti-ship missiles).
[0] and Typhoon's SLBMs were even larger at 16.1m by 2.4
SLBM are big, a Trident II is 13.6m long and 2.11m wide[0] and Ohios need to fit them straight up plus the hull, so we're talking 14m moulded depth or so (excluding the sail),
There are designs that use the sail, the North Koreans are using that configuration. They took old Romeo class and extended the sail back along the hull to fit 3 launch tubes. But the tubes extend so far down into the hull that they have had to remove batteries in order to do it. Which is a pretty severe compromise as what you absolutely want in such a sub is endurance.
Interestingly they have designated those missiles Pukkuksong, which translates as... Polaris!
Technically they don't need to, but storing them vertically means you don't have to surface to launch: if you can make the missiles buoyant (at will, usually by pumping gas or vaporising a bunch of water when you want to launch them) they'll pop out the water like corks at which point the rocket engines fire and off it goes. This means your sub can stay safe and secure below the waves while launching.
Why do you need them vertically stored for that scenario? Couldn't you make the front of the missile more buoyant than the rest, so once you pop it out of the sub it self-rights and likewise pops out of the water?
I imagine flipping from horizontal to vertical would put stresses on the rocket body, so there are engineering problems to solve, but still it's surprising that the only way to solve that problem has to been to build a launch platform 5 or 10 times bigger than is otherwise desirable.
> Why do you need them vertically stored for that scenario? Couldn't you make the front of the missile more buoyant than the rest, so once you pop it out of the sub it self-rights and likewise pops out of the water?
That would make the entire thing more complicated with more chances of failure because now the SLBM wobbles around when it tries to right itself up (on a non-aerodynamic axis so more chance it'll move wrong), you need much bigger openings for the missiles, and your gain will be limited: remember, they're 2m wide so if you stack them by 4 you still need 9m for the missiles alone except now you also need to have 3 rows of missiles meaning you need a lot of extra horizontal space (in the current configuration the missile compartment of an Ohio is about 40m, it'd need to be 60+). It also makes the launch procedure take longer, as the missile can't accelerate as fast out of its casing: it doesn't just pop straight up like a cork anymore.
Also, reportedly Soviet ballistic missiles were/are less accurate than US ones, so they compensated by having a bigger bang, in turn needing a bigger missile to launch it.
Another solution would be to do what the North Korean missile subs, putting the missile tubes in the (lengthened) sail.
> Another solution would be to do what the North Korean missile subs, putting the missile tubes in the (lengthened) sail.
The US used to have something like this in the Regulus, their intended launcher (the Grayback-class) essentially had hangars.
The great advantage of SLBMs is that the vertical mounting and a good enough launch sequence means you don't have to surface to launch: https://youtu.be/sUlXty69-Y8
You need a certain diameter of the pressure hull in order to accommodate the length of the missiles and their launch tubes. Also a factor - the range of the missile. Want a longer range? You'll need more fuel and the missile gets longer. Which means you need a bigger sub.
The Ohio-class carries 24 60-ton Trident missiles, 1,440 tons of dead weight. That doesn't seem like enough on its own to justify the difference in displacement of 18,000 tons vs 6,000 on the Los Angeles-class. (I'm just getting these numbers from Wikipedia so may misunderstand something)
"24 60-ton Trident missiles". wow, so let's say each has a MIRV with 5 W88 warheads at 500KT each. That's about 120 independently targetable warheads (each 6-7x more powerful than the Fatman nuclear weapon dropped on Nagasaki) per submarine. Wikipedia says they are on 14 Ohio class subs operated by the US. That's 1,680 total but let's say only 75% are operational at a time. So the US Trident II SLBM cocked-locked-ready-to-rock capability is around 1.3K 500KT warheads alone. That's... a lot.
More like half active, a quarter in port or in light maintenance, a quarter in deep maintenance. Realistically, two always on station from each fleet, sometimes four. Enough to maintain second strike deterrence even with enemy attack subs to contend with.
It also important to note that once an SSBN launches, there will likely be return fire from either land or sea based ballistic missiles that will boil the ocean for 50nm, incoming in 30-60 minutes. So tactically it is hard to launch just one nuke... It's full commitment or nothing. Just another cheery aspect of escalation dynamics.
> So the US Trident II SLBM cocked-locked-ready-to-rock capability is around 1.3K 500KT warheads alone. That's... a lot.
Aside from overstating operational readiness, you also upped the W88 yield from it's actual 455KT and, while most sources do reported that 4-5 warheads per missile is typical, you assumed all in the fleet or W88s, while they seem to be a mix of W88 and 90KT W76.
So it's a lot less ready to go than you've estimated here.
> Attack submarines are much smaller than missile subs. I don't understand exactly why this is
Because a missile sub is, loosely, an attack sub with an ICBM base strapped to it. (Yes, technically SLBMs aren't ICBMs, but late Cold War SLBMs had ranges greater than the upper end for IRBMs, and so would be ICBMs if land based.)
> and what the trade offs are here - manoeuvrability, cost?
The boomer trades off maneuverability for the ability to destroy a moderate-size country with nuclear hellfire from thousands of miles away.
Your comparing a fast attack sub to a ballistic missile sub. The Typhoon is nearly twice as large. Compare instead an Alfa or Akula class Russian fast attack.
Los Angeles-class are fast attack boats, they are much smaller than boomers, which is what the Typhoon class is (they carry nuclear warheads). But Typhoon class is even larger than the American boomers (Ohio class - and the soon to be Columbia class).
Hum... Brazil is borrowing the tried and tested ideas of education over radio and TV for remote instruction in rural areas.
At the same time, everybody is trying as hard as they can to stop needing them. That's because those techs suck. It is much easier to learn when you have any bit of interactivity, the more interactivity, the easier it is. Broadcast and postage are just not suitable.
Lately, I thought a lot about an anecdote we used to tell in Germany about business consultants. It goes somewhat like this: A consultant meets an old fisherman at a small port. The fisherman is done fishing and enjoying himself. The consultant asks why the fisherman isn't taking a loan to get a bigger ship and fish more. Because he would make a lot of money to do whatever he wants. The fisherman said that he is already doing that, fishing in the morning and enjoying the sun on a bank at port in the evening.
I came to realise, that I'd rather be the fisherman. Which doesn't mean the other approach is wrong, so.
How would the fisherman feed himself if he broke his arms? Alternatively, what if he wakes up one day and finds that all the fish near his village have been fished out of the ocean by other, more entrepreneurial fishermen?
If had money saved up, at least he could buy food for him and his family.
Social safety net and sustainability regulations. It’s not normal in much of the world to spend your life with the looming fear of being bankrupted by a serious illness or to treat natural ecosystems as a zero sum game to be exploited.
Look, I'm no fan of Bush II and I don't want to turn this into political theater, but the presidency was corrupted long before Bush II. I'd almost guarantee that his policy was set forth in an almost "dynastical" form, that has been around since Carter's interventions in the Middle East. Maybe before.
That being said, I wish they had all stuck to their post presidential passions... minus the political fund raising.
Just looked him up - he had a crazy year in 2018.
Became CEO of Goldman, divorced his wife, released an EDM single that debuted at #39 on the Billboard EDM charts, and his personal assistant committed suicide after getting caught stealing $1.2 million of wine from his private cellar.
Only if my company was in the business of breaking new ground, i.e. scientific discovery or innovative engineering. That's why the likes of Alphabet and Facebook have research divisions (including for things rather far afield from their core money-making products): to give execs and talent a greater sense of purpose and to create/develop important stuff.
See, this is the main problem about buying new technology. The device is marketed as a graceful solution for all your "paper needs."
My principle need for a tablet has always been ebook consumption. The ebook readers on Linux I've seen all look like hot garbage. Sure, Calibre allows you to manage massive ebook collections. Now let me have a book experience that doesn't look like 1999.
I thought Provenance was a lot weaker than the rest of the Ancillary series. It was still good though.
The 2018 Hugo novel field was REALLY good. There wasn't a klunker in the group. My favorite was Kim Stanley Robinson's "New York 2140" but it was a very hard call.
I think a lot of airbnb is now technically sub-zero-income property. Glad to hear there is one less airbnb property out there, and congrats on the cheaper rent.
I'll put my other comment here as despite putting anything contentious, the mod here immediately locks my comments on housing related issues:
Correct. So rents fall yet we were told on hacker news over and over that zoning was the problem. That doesn't help, but airbnb was a huge, huge problem.
They dumped her when she complained, and found another church member to fill in. An actual tour manager would have cost more money and would have had a contract to get expenses like that paid.