shut down all gas & oil pipelines immediately, and ground all aircraft. Also we should probably evacuate all tall buildings--you know, since having a lot of connected steel makes you subject to catastrophic stress fractures and there's no possible way to guard against that
Hmm. Airplanes are smaller, They are checked often and there is a shit ton of data on when they fail. Still. Sometimes they do. When they do, like the plane that landed in Hawaii, with major pressure differentials that failure is really fast.
The issue with the hyperloop is not a single 200ft long tube that must handle pressure changes over and over again as a routine. The issue is two fold.
1: 400 - 500 miles of tube and all the connections that must have expansion joints that move with a seal.
2: The massive pressure differential.
It of course can be done safely. We can engineer a system to do it. We will not though, because of cost.
If you could get away with an expansion joint (a really big one) every 2000 ft, (have not done the math, but it will probably have to be less) you are talking at least 1200 of these joints. They are moving every day. Large pieces sliding over each other with large seals to keep the pressure out.
Conservatively for steel expansion over 2000ft in length the expansion joint would need to move, if the coldest temp expected is 40f and the hottest is 100f (the range would actually have to be designed higher than this) each joint would have to be able to move a.864 ft or a little over 10 inches of travel.
Then you have a 13 ft diameter tube that expand and contract a little bit there as well. Pretty insignificant until you realize that what ever seal you use is going to have to keep the seal over that range of diameter. It will experience, when cold, very high stress. So.
These 1200 (AT LEAST) expansion joints that are expected to move about a foot with seals under high and variable stress while sliding up and down the tube are going to need to be checked often. That is 1200 per tube with you needing one tube for each direction. 2400 Expansion joints.
These just the special expansion joints. There will be many more, but they will be under much less stress and much less likely to fail.
So. 5 teams of men, working 50 weeks a year, 5 days a week would need to check 2 joints a day and do nothing but that. They can not depressurize the system to do physical checks, but they can use ultrasound equipment. This is zero checking on any other joints along the system. Those seals under that kind of stress will need to be replaced. This means that they have to depressurize, dismantle, rebuild the joint and pressurize that section for each repair. If a seal like that can stay safe under those conditions, I think we would both be pleasantly surprised if it could be designed to last 5 years.
Run in the system a few years and you are going to be replacing 40 of these seals and joints a month.
So. With zero failures and checking constantly if you only run 12 hours a day and spend the other 12 hours on maintaining the system it would be a major effort to design expansion joints that can average years of life, but with enough money and dedication you can keep a system like that up. I would suggest that you check the joints more often and then check the regular joints once a year. Also 10.3 inches of travel is A LOT. You could do better and reduce stress with 3 or 4 inches. That would mean going from 2400 of these joints to 7000 or 7500. You might want to plan for places that get colder at night than 40f or hotter during summer days than 100f.
So, 8000 - 9000 of these?
The science is easy. The implementation of a system like this is more complicated than meets the eye.
Failure is not coming from a pinhole. Those expansion joints will not see that type of failure. It will be a stress fracture from constant expansion and contraction of the joint.
See. These long rigid tubes are going to expand and contract a lot because of temperature changes over the length of the system. You are going to have thousands of joints able to move FEET to accommodate this. They will be under constant stresses. The failure that you will see is a stress fracture. Once this gets large enough to start leaking it is going to grow rapidly. Stress fractures, for the most part have 2 modes. "Nothing to see here unless you look REALLY close" and "Fuck you I have failed."
A leak with those kinds of pressure differentials is going to go from the tiniest beginnings of a leak to a catastrophic failure of that joint in an exceedingly short period of time. You are going to end up with a full failure of the joint in a second. If you are lucky the nearest car is far enough away that they can seal off the section and get the car approaching that section stopped before it gets there. If a car is in that section the people are just dead. If the car is too close to the section you are looking at some injuries all the way too, "Everyone dead."
Sure.
You design a tube system over terrain exposed to temp differences with a few thousand flexible joints to handle expansion and contraction. Keep the whole thing near a perfect vacuum and send cabs filled with people through it at 760 Mph.
Engineering. Hard stuff for many. Easy if you do not even think about it.
That pressure is going to move as a fairly thick wave. When the vehicle hits it at 760Mph, the resulting massive increase in drag will cause at the same time a massive deceleration. The car may not be flat, but the people will slam into shit so hard that they no longer have bones.
The big problem is when traveling in a near vacuum at 760 Mph and a joint leaks and part of the system gets to normal pressure and a car hits that air at 760 Mph it is going to turn a lot of people into jelly.
Just another whiny little bitch that failed at everything and blames anyone in life that is not going to end up killing themselves as the only action of matter that they can take for making their lives hell.
Laugh at what you want. The fact that volodymyrbiryuk was very clear in his comment are not taken away by pathetic lies about intent.
The title and the content are clear.
Title of your comment.
Treat the problem rather than the symptoms
Maybe they should start paying the chinese workers fair wages so the won't have an incentive to leak stuff
I didn't say the approach will cure the problem.
You stated quite clearly that the problem WAS the wages. The problem is not wages. The problem is that the incentives are many and huge. Also the newer Chinese culture is built around the idea of cheating and theft. They have entire regions dedicated to it.
In short, if you raised wages by 50%, it would not make more than a 1% difference in leaks.
I fully agree on fair wages bro, but the shit after that is pure fucking insane.
You have to be retarded to think a rise in wages will prevent leaks. Obviously you are an ideologue and you can not help but being duped into thinking that the belief system you operate under is the fix for every problem you see.
Possibly if you opened your mind a bit you could operate intelligently on the facts around you instead of looking like a pathetic retard spouting crazy shit.
First. The idea that women get stereotyped more than men if fucking idiotic. Every single person who thinks stereotypically about one gender does the same for the other gender. (Yes. There are two of them.)
Next. Grow the fuck up. If being uncomfortable is a valid excuse for not doing a fucking job, nothing in this world would ever get done except for jacking it. Different people, bosses, people trying to climb the ladder of success over you back, new challenges, failures, responsibilities, business relationships.... There are a literal fuck ton of shit that we all have to get over being uncomfortable with. If you can not hack it, get out.
No one is after you. No one at work gives a fuck about you, your feelings or your well being. That is YOUR job.
Women lead fortune 500 companies, lead countries. If you are being held back it is just because you fucking suck.
Slashdot Mirror
The plans I saw for the Hyperloop have it above ground. Mainly because digging a tunnel for 400 miles is a bitch.
Pressure at sea level 59F. 760mm hg
Pressure at 150,000 ft 1.1 mm hg
Pressure at 200,000 ft 0.17 mm hg
Designed to operate at the equivalent of 160,000 ft
760 mm hg vs about 1. By any book that is a fairly fucking extreme pressure differential.
shut down all gas & oil pipelines immediately, and ground all aircraft. Also we should probably evacuate all tall buildings--you know, since having a lot of connected steel makes you subject to catastrophic stress fractures and there's no possible way to guard against that
Hmm. Airplanes are smaller, They are checked often and there is a shit ton of data on when they fail. Still. Sometimes they do. When they do, like the plane that landed in Hawaii, with major pressure differentials that failure is really fast.
.864 ft or a little over 10 inches of travel.
The issue with the hyperloop is not a single 200ft long tube that must handle pressure changes over and over again as a routine. The issue is two fold.
1: 400 - 500 miles of tube and all the connections that must have expansion joints that move with a seal.
2: The massive pressure differential.
It of course can be done safely. We can engineer a system to do it. We will not though, because of cost.
If you could get away with an expansion joint (a really big one) every 2000 ft, (have not done the math, but it will probably have to be less) you are talking at least 1200 of these joints. They are moving every day. Large pieces sliding over each other with large seals to keep the pressure out. Conservatively for steel expansion over 2000ft in length the expansion joint would need to move, if the coldest temp expected is 40f and the hottest is 100f (the range would actually have to be designed higher than this) each joint would have to be able to move a
Then you have a 13 ft diameter tube that expand and contract a little bit there as well. Pretty insignificant until you realize that what ever seal you use is going to have to keep the seal over that range of diameter. It will experience, when cold, very high stress. So.
These 1200 (AT LEAST) expansion joints that are expected to move about a foot with seals under high and variable stress while sliding up and down the tube are going to need to be checked often. That is 1200 per tube with you needing one tube for each direction. 2400 Expansion joints.
These just the special expansion joints. There will be many more, but they will be under much less stress and much less likely to fail.
So. 5 teams of men, working 50 weeks a year, 5 days a week would need to check 2 joints a day and do nothing but that. They can not depressurize the system to do physical checks, but they can use ultrasound equipment. This is zero checking on any other joints along the system. Those seals under that kind of stress will need to be replaced. This means that they have to depressurize, dismantle, rebuild the joint and pressurize that section for each repair. If a seal like that can stay safe under those conditions, I think we would both be pleasantly surprised if it could be designed to last 5 years.
Run in the system a few years and you are going to be replacing 40 of these seals and joints a month. So. With zero failures and checking constantly if you only run 12 hours a day and spend the other 12 hours on maintaining the system it would be a major effort to design expansion joints that can average years of life, but with enough money and dedication you can keep a system like that up. I would suggest that you check the joints more often and then check the regular joints once a year. Also 10.3 inches of travel is A LOT. You could do better and reduce stress with 3 or 4 inches. That would mean going from 2400 of these joints to 7000 or 7500. You might want to plan for places that get colder at night than 40f or hotter during summer days than 100f.
So, 8000 - 9000 of these?
The science is easy. The implementation of a system like this is more complicated than meets the eye.
Feel free to attack any of the math you like.
Also maybe a seal failure on the moving part. Also Catastrophic and fast.
Failure is not coming from a pinhole. Those expansion joints will not see that type of failure. It will be a stress fracture from constant expansion and contraction of the joint.
See. These long rigid tubes are going to expand and contract a lot because of temperature changes over the length of the system. You are going to have thousands of joints able to move FEET to accommodate this. They will be under constant stresses. The failure that you will see is a stress fracture. Once this gets large enough to start leaking it is going to grow rapidly. Stress fractures, for the most part have 2 modes. "Nothing to see here unless you look REALLY close" and "Fuck you I have failed."
A leak with those kinds of pressure differentials is going to go from the tiniest beginnings of a leak to a catastrophic failure of that joint in an exceedingly short period of time. You are going to end up with a full failure of the joint in a second. If you are lucky the nearest car is far enough away that they can seal off the section and get the car approaching that section stopped before it gets there. If a car is in that section the people are just dead. If the car is too close to the section you are looking at some injuries all the way too, "Everyone dead."
Extreme vacuums do not fail gently.
Sure.
You design a tube system over terrain exposed to temp differences with a few thousand flexible joints to handle expansion and contraction. Keep the whole thing near a perfect vacuum and send cabs filled with people through it at 760 Mph.
Engineering. Hard stuff for many. Easy if you do not even think about it.
That pressure is going to move as a fairly thick wave. When the vehicle hits it at 760Mph, the resulting massive increase in drag will cause at the same time a massive deceleration. The car may not be flat, but the people will slam into shit so hard that they no longer have bones.
The big problem is when traveling in a near vacuum at 760 Mph and a joint leaks and part of the system gets to normal pressure and a car hits that air at 760 Mph it is going to turn a lot of people into jelly.
So. No problem.
Just another whiny little bitch that failed at everything and blames anyone in life that is not going to end up killing themselves as the only action of matter that they can take for making their lives hell.
That they are not paying royalties for songs they own?
I fucking hate systemd.
Extend.
Extinguish.
What is the story here?
Laugh at what you want. The fact that volodymyrbiryuk was very clear in his comment are not taken away by pathetic lies about intent.
The title and the content are clear.
Other than the title and the content, you are correct.
Get a fact.
Are you saying that the Chinese do not currently have entire regions of their country dedicated to copyright and patent infringement?
No?
Just because a fact describes something happening within a culture that is negative does not make it wrong.
AC talking shit.
Means as much as your life does. Nothing.
Treat the problem rather than the symptoms
Maybe they should start paying the chinese workers fair wages so the won't have an incentive to leak stuff
I didn't say the approach will cure the problem.
You stated quite clearly that the problem WAS the wages. The problem is not wages. The problem is that the incentives are many and huge. Also the newer Chinese culture is built around the idea of cheating and theft. They have entire regions dedicated to it.
In short, if you raised wages by 50%, it would not make more than a 1% difference in leaks.
I fully agree on fair wages bro, but the shit after that is pure fucking insane.
You have to be retarded to think a rise in wages will prevent leaks. Obviously you are an ideologue and you can not help but being duped into thinking that the belief system you operate under is the fix for every problem you see.
Possibly if you opened your mind a bit you could operate intelligently on the facts around you instead of looking like a pathetic retard spouting crazy shit.
Need to protect people from replacing shitt GPS Navigators with Google Maps.
Some developers have more space to hold money, and TAB, when you can even find it is expensive.
First. The idea that women get stereotyped more than men if fucking idiotic. Every single person who thinks stereotypically about one gender does the same for the other gender. (Yes. There are two of them.)
.... There are a literal fuck ton of shit that we all have to get over being uncomfortable with. If you can not hack it, get out.
Next. Grow the fuck up. If being uncomfortable is a valid excuse for not doing a fucking job, nothing in this world would ever get done except for jacking it. Different people, bosses, people trying to climb the ladder of success over you back, new challenges, failures, responsibilities, business relationships
No one is after you. No one at work gives a fuck about you, your feelings or your well being. That is YOUR job.
Women lead fortune 500 companies, lead countries. If you are being held back it is just because you fucking suck.
I have to wonder though.
If this is related to the Intel Management Engine exploit. At the moment I have no idea how you can protect from this.