We made new better vacuum chamber and tested it some stress toys etc. random stuff. If you have ideas what to put inside of our new vacuum chamber please let us know.
Seems that I am missing first couple seconds from my intro, I think that doesn't matter :D Maybe I should redo the intro for this channel anyways, what would be good clips for intro?
Need some slow mo smashinator clips for the new intro, or a few of them in normal speed put together rapidly. And maybe one of the things you did with the Sons of Explosions as well.
You want that hose as large as possible and as short as possible. Remember: A low pressures the gas moves by diffusion rather than flow. Pus if your going to do a lot of experiments with water, build a cold-trap, once you get water into your pump oil you lower the ultimate vaccume your pump can do until the oil is changed.
The oil change clearly color after pulling lot of water but you can clear it by running pump with closed valve for 10-20 minutes not sure how good that is for the pump but at least the oil clears up :D
Not so good if anything you get into the pump can corrode the pump's surfaces. I used to work in research lab and we used same kind of set up to dry things. Without condenser pumps did not last long.
Electra Flarefire that’s what I suggested. After 40 years of low temperature refrigeration system repair and installation you learn pretty fast that vacuum pump oil is cheap and you won’t get home until really late if the pump doesn’t suck good enough!
Beyond the press the moisture degrades the oil pretty fast. Cooking the oil out will give you a little extra time, but the pump relies on the oil for high vacuum. You should go as far as flushing the pump out with fresh oil, draining it and refilling it to the proper level to clear out the contaminated oil. I realize you’re not using it for critical operations, but vacuum pump oil is relatively cheap.
Be very VERY careful around that glass chamber. The walls are *extremely* thin for such a large area and it is almost certain to implode after a number of vacuum cycles. Definitely wear eye protection around it at the very least and optimally should wear a full face shield. Proper glass bell jar that size should have a thickness of about a centimeter....
I don't know how thick the glass actually is, but it doesn't take much. Pulling a vacuum is not like a pressure chamber, you can get a maximum of 1 atmosphere pressure differential, and the force is coming from the outside of the glass, so the dome's shape does a lot of the work. Re-using and handling it so it eventually gets a chip or crack that causes a weak spot is really the only concern if it works once, but safety glasses are definitely wise.
When lowering the air pressure, you are also lowering the boiling point of water (at 0,025 bar water boils at 21degrees C). If you are getting down to 0,006 bar, you cannot have liquid water, just ice or vapour (steam). The cooling you measure is expanding air that was trapped in the slimy stuff. So with the vacuum chamber you cool the air (at least what’s left of it..) and "boil" the water at the same time. Try vacuuming a snowball or ice cubes, if it contains a lot of trapped air it may explode :)
That bonus content - I thought a video on my channel was playing. A helicopter landed in the field at the back of my mum's house. Was pretty cool watching it land so close by and take off again.
Awesome chamber! You might want to use a thicker rubber base to aid in sealing and also to prevent the rubber base from rising inside the chamber and pulling the walls in.
They did that near us too, an elderly lady was ill in some way and for some reason they deemed it necessary to send out a helicopter when we have a first responder who parks just down the road and the hospital is 5 miles away which doesn't take that long in good traffic. EDIT: Not to mention the General Practice is less than a mile away.
You forgot a really fun experiment. You put something that makes sounds into the chamber such as an alarm clock. It's crazy how the sound stops in the vacuum
i appreciate that you guys post videos on stuff you do even if it fails, that's rare for youtube. as for the air ambulance, it may have been called out for an urgent emergency where there is dense traffic near the hospital, or it could be taking the patient to a specialist hospital that is further away if the local one doesn't have the necessary stuff to treat them.
You 2 are a fantastic couple You Guys always seem to have so much fun in whatever you do Always enjoy the videos I got my friend to watch the channel and now him and his kids watch together Keep up the Great Work
Not bad for the first try of your new setup. I was like you I was hoping the chicken would squeak when you let the air back in. Hope Anni's finger gets well soon!
It's eyes were trying to look at you guys. Very like from the movie "Mars attacks" great channel, should be compulsory for all schools to watch for science ideas.
small servo motor mounted inside with a arm connected to a needle..to pop the items while they are expanded.... This needs to be tried! +Beyond the press
The one with the net wouldn't expand because there's no gas to extract I used to have one, my friends called it a diseased mango because it was red with yellow goo
Change the oil in the vacuum pump. Use vacuum pump oil....nothing else. The pump really relies on the oil to make high vacuum. We used to change the oil after every large refrigeration system evacuation. It’s especially important after any moisture is pulled through the pump as moisture degrades the oil right away.
Vacuum chamber is a great idea for the channel! You need to look for objects with captive air bubbles, like marshmallows and Styrofoam. If you use a syringe you can inject air into most stress toys without really damaging the surface. Use more compressible gases for bigger effect.
Moi Lauri and Anni! Remember safety is number one priority! Safety glasses for my two favorite Funnish RU-vidrs! Try some fruit in that chamber or some eggs and get the slow mo cameras ready!
Being in the airless void will not rapidly descrease your temperature by itself... but whatever put you into the vacuum probably will. The slime was probably trading heat back and forth with the air, and the air got sucked out before it could return it. So when you are blown out of the air lock, that escaping gust of air is basically adding wind chill to space.
Lauri, for the best effects you need objects that contain air or a gas, as they will be compressed by atmospheric pressure. Liquids are usually incompressible so when removing the air pressure, only the temperature will change. Liquids that contain dissolved gasses will release the gas when the pressure is removed. Be careful with this the pressure in a soda can or bottle is enough to explode your glass pressure vessel. One last point, squeezing the rubber chicken in a vacuum will be silent. There is no air to force through the squeaker to make a noise also sound cannot travel through a vacuum so even if you did get it to make a noise, the sound wave has nothing to travel through. To test this put a noise source, say an alarm clock or radio in the chamber and remove the air. It will eventually go silent. The first toy looked great with all the slime coming out of the eye socket. Looking forward to more vacuum videos.
