This is one of the many thermal and pressure chambers at NASA JSC. While learning about these things, I learned some interesting facts. It takes several hours, and even in some cases, days to get the chamber to a perfect vacuum, and also, they cost between $5,000 and $15,000 for each test because of the amount of liquid nitrogen used, and also the staff to watch it and the power used . I was surprised at the cost, for what that's worth, you might as well buy a bell jar and a pump and get to an almost perfect vacuum.
This is one of the many thermal and pressure chambers at NASA JSC. While learning about these things, I learned some interesting facts. It takes several hours, and even in some cases, days to get the chamber to a perfect vacuum, and also, they cost between $5,000 and $15,000 for each test because of the amount of liquid nitrogen used, and also the staff to watch it and the power used . I was surprised at the cost, for what that's worth, you might as well buy a bell jar and a pump and get to an almost perfect vacuum.