Old comment but 100% this, that pump sounds very bad

Yeah that thing was fckd broken vanes

Send me some stuff please

all the stuff probably old that's how he probably bought it

eBay - I work at a place assessing these parts for resale/reuse/etc.

Turbomolecular pumps are pretty simple in principle. If you look down inside one it looks kind of like a jet engine, and that's on purpose. A turbomolecular pump is a specialized kind of axial compressor, it works by arranging the rotor and stator vanes such that when the rotor's spinning, it's overwhelmingly likely that any gas particle that enters the pump will travel further into it. The main difference between a turbomolecular pump and any other sort of axial compressor is that it's optimized for really low pressures, and as a result, is built more to whack individual gas molecules toward the outlet, rather than treating the aggregate of gas particles like a single "thing". That way as gas particles randomly bounce around inside the chamber, whenever they happen to bounce toward the pump, they generally don't find their way back into the chamber. That's also why the inlet of the pump is so big despite it not handling large volumes of gas well.

Don't know what he thinks but it's impossible to seal the windows or anything else in the -17 Torr of "outer" space. We can't even seal the fuel tanks on the SR71 Blackbird. They leak fuel when the plane is on the ground until it flies and gets up to speed and the titanium warms and expands. Considering the much, much greater differences in temperature for "space" travel where is this unobtainium super material that seals the space station? Rocket fuel tanks? What material is it? I'd really like to hear from materials specialists and physicists.

What kind of heads do they use?

@@johnnycash4034 Pretty much any type of standard glass A/B tubes, G75 or G100 ones fex works perfect but also nude ones. But you then might have to tinker a little with it to get emission or such right since they have a little higher sensitivity than the glass ones. He use fex two tubes and at 2:36, you can see them as the one glass tube closest with a black band (its actually silvery like a mirror but seen black in this ange), have one my self, and little to the right another one with the blue connection plug on the bottom but that tube is totally clear.

his garage

@@jamesparker8529 yup

About the same as the forces at 1 torr (why?) Atmospheric pressure on each surface.

no he's not

that's normal when you start up mechanical roughing pumps. it's due to cavitation and goes away after it runs for a bit.

No, this is _far_ from space. That's many orders of magnitude higher. That's some serious vacuum and is really difficult to achieve compared to this.

I actually ran the thermal vacuum chamber to bake out the tires that got put on the Tesla they shot up. The tires after the bake out were surprisingly still well intact. However, I have no doubt that they would shred instantly if they were ever actually driven on again. The two tires (they only launched 2 tires and put mass simulators on the side facing away from the camera) that SpaceX actually baked out left a good 1-2 gallons of goo when done that smelled of death.

And the tire would survive with air in it but the seal would fail and allow the air inside to escape before any catastrophic failure in the tire itself.

how come elon said it was a normal car that was not prepped at all for space?

@@A2J_Tim I don't recall seeing that. The gas and oil was removed and only 2 tires attached for the camera to see. IDK if they did anything to the interior.

you use it to do experiments under high vacuum

i bet tha whole setup is 10k being cheap on it. work in the industry and that stuff costs. hell vcr gaskets can be 100$'s. hes using metal gaskets could use some viton o rings for cheap. just for perspective my co worker told me he had to replace a oring for a ion implanter and the o ring cost 5k...

@@TheProsnurfer At least 10k no doubt and if all new easy at least 200k+. The gaskets can be expensive if big, meta gaskets is key for low vacuum but when only 1e-6 torr its not really necessary but it could help getting down faster since they don't outgas anything, but viton doesn't either.

Not for very high vacuum, you need stainless steel rated for very high vacuum. But for a hobby vacuum chamber with not so high vacuum you could use aluminum.

he said after days or weeks it would get to -6

+iPROFITDON it’s ok