Way cool Space Engineering Of The Day.
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The shutters, which are on the outside of the Space Station are directly opened/closed from inside the station via a mechanical coupling with only a few rubber o-rings to keep the pressure. (the video explains it better and I can). [7 HOLES in the Space Station - Smarter Every Day 135 - YouTube](https://www.youtube.com/watch?v=KSzuiqVjJg4)
I'd rather be phishing!
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The shutters, which are on the outside of the Space Station are directly opened/closed from inside the station via a mechanical coupling with only a few rubber o-rings to keep the pressure. (the video explains it better and I can). [7 HOLES in the Space Station - Smarter Every Day 135 - YouTube](https://www.youtube.com/watch?v=KSzuiqVjJg4)
I'd rather be phishing!
I like that engineer dude. Very humble.
#SupportHeForShe Government can give you nothing but what it takes from somebody else. A government big enough to give you everything you want is big enough to take everything you've got, including your freedom.-Ezra Taft Benson You must accept 1 of 2 basic premises: Either we are alone in the universe or we are not alone. Either way, the implications are staggering!-Wernher von Braun
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The shutters, which are on the outside of the Space Station are directly opened/closed from inside the station via a mechanical coupling with only a few rubber o-rings to keep the pressure. (the video explains it better and I can). [7 HOLES in the Space Station - Smarter Every Day 135 - YouTube](https://www.youtube.com/watch?v=KSzuiqVjJg4)
I'd rather be phishing!
How different paths of like make different things great or small. In my real life, back in Chemistry, I used "UltraTorr" fittings - hand tight - to maintain a pressure of 10-7 Torr in my vacuum line vs. atmospheric pressure. You just slid the bugger over the tubes (glass) on the line and the container, gave a little twist to compress the o-rings - and done. The lubricant on the o-rings was, as I recall, Apiezon-H . Nothing fancy in this.
(that's a pressure ratio of about 10 billion to 1, give or take)."The difference between genius and stupidity is that genius has its limits." - Albert Einstein
"If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010
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I like that engineer dude. Very humble.
#SupportHeForShe Government can give you nothing but what it takes from somebody else. A government big enough to give you everything you want is big enough to take everything you've got, including your freedom.-Ezra Taft Benson You must accept 1 of 2 basic premises: Either we are alone in the universe or we are not alone. Either way, the implications are staggering!-Wernher von Braun
-
The shutters, which are on the outside of the Space Station are directly opened/closed from inside the station via a mechanical coupling with only a few rubber o-rings to keep the pressure. (the video explains it better and I can). [7 HOLES in the Space Station - Smarter Every Day 135 - YouTube](https://www.youtube.com/watch?v=KSzuiqVjJg4)
I'd rather be phishing!
This brings to mind the god-awful Alien (whatever) movie, where the virtually indestructible alien is sucked out into space through a peanut-sized hole, because of the PHENOMENAL pressure gradient of one (1) atmosphere.
I wanna be a eunuchs developer! Pass me a bread knife!
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How different paths of like make different things great or small. In my real life, back in Chemistry, I used "UltraTorr" fittings - hand tight - to maintain a pressure of 10-7 Torr in my vacuum line vs. atmospheric pressure. You just slid the bugger over the tubes (glass) on the line and the container, gave a little twist to compress the o-rings - and done. The lubricant on the o-rings was, as I recall, Apiezon-H . Nothing fancy in this.
(that's a pressure ratio of about 10 billion to 1, give or take)."The difference between genius and stupidity is that genius has its limits." - Albert Einstein
"If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010
I worked on the other end of the pressure spectrum with high pressures in the oilfield biz. A well logging tool is assembled at room temperature and atmospheric pressure, with two 3.5 inch O rings holding back external wellsite pressures when going down the hole. I don't know the numbers but tools would routinely go deeper than 20,000 feet in drilling mud of density up to about 9+ lb/US gallon (fresh water is 8.34 lb/gal). One of my operators had a waterproof watch he didn't like and the store wouldn't let him return it. He strapped it to the back of one of the caliper tools, ran it into the well and returned the resulting mess to get his money back. [later] Okay, found the magic formula... Hydrostatic pressure, psi = lb./gal x 0.052 x depth (ft) For 20000 feet depth, 9 lb/gal mud, pressure = 9 * 0.052 * 20000 or 9360 psi (about 625 atmospheres) Not outrageously impressive but that is all held back by two little O rings. That's a little more than the fraction of an atmosphere in the space station... Sorry for the non-metric units. Hazard of working in the oil biz...
I'm retired. There's a nap for that... - Harvey
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I worked on the other end of the pressure spectrum with high pressures in the oilfield biz. A well logging tool is assembled at room temperature and atmospheric pressure, with two 3.5 inch O rings holding back external wellsite pressures when going down the hole. I don't know the numbers but tools would routinely go deeper than 20,000 feet in drilling mud of density up to about 9+ lb/US gallon (fresh water is 8.34 lb/gal). One of my operators had a waterproof watch he didn't like and the store wouldn't let him return it. He strapped it to the back of one of the caliper tools, ran it into the well and returned the resulting mess to get his money back. [later] Okay, found the magic formula... Hydrostatic pressure, psi = lb./gal x 0.052 x depth (ft) For 20000 feet depth, 9 lb/gal mud, pressure = 9 * 0.052 * 20000 or 9360 psi (about 625 atmospheres) Not outrageously impressive but that is all held back by two little O rings. That's a little more than the fraction of an atmosphere in the space station... Sorry for the non-metric units. Hazard of working in the oil biz...
I'm retired. There's a nap for that... - Harvey
That's OK - I live in a non-metric country. More common high-pressure - those compressed gas cylinders that are found 'all over'. In the lab, in was not uncommon to have the cylinder side pressure ca. 1/4 of what you calculated. So, in the ballpark. Those regulators faithfully dropped it down to the few psi above atmospheric pressure that we needed. I like the watch story - outsmarting stupid. Satisfying, indeed, when it can be done.
"The difference between genius and stupidity is that genius has its limits." - Albert Einstein
"If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010