2 Liter Bottle Compressor (No Moving Parts)

I've got a problem my car tire has a slow leak and I keep having to grab an air hose to refill it but I've got this garden hose right here is there a way for me to use that to refill this okay here's my idea if you cut a small hole into the base of a balloon stretch it over a bottle then put something like this one a filter nozzle and through that hole when you turn the water on it starts to inflate the balloon with air because the water pressure is forcing the air into the balloon now to do this right I made an adapter to allow me to connect a water hose and then fill the balloon directly and if we open this up [Music] [Music] we can see how much air comes from a 2-liter bottle into a balloon so to fill the tire all I should have to do is connect to one of these and we should be good to go so how many of these bottles are we going to need well to figure that out we basically need to know what is the volume that it can hold to get an estimate we measure for two circles calculate the area then multiply it by the width of the tire when I do that I come up with a little over 30 liters now if we pictured the bottles next to each other around the tire sure enough it looks like there's about fifteen two liter bottles is it the air inside of a tire compressed with a liquid when you fill a bottle that's it no more is going to go in there but with gases and air we can just keep adding and adding and adding and eventually if the pressure is high enough you can get more air into a smaller container than you can into a bigger one even though this 2-liter is twice the size of this one liter bottle I raised the pressure so high that I was able to inflate a balloon bigger than the two-liter did so how much compression does the air in the tire need well to understand that it helps to think in terms of atmospheres and Earth's atmosphere is so thick it actually has me weight to it to the tune of about 15 pounds per square inch at sea level now if we were to double that that would be two atmospheres and to triple it would be three atmospheres pushing down on us all the time that's actually a little bit less than what my tire needs even a completely flat tire still has one atmosphere in it so technically I only need two atmospheres to fill it up so 30 liters times two atmospheres would be 60 liters of normal atmosphere meaning I need at least 30 of these 2-liter bottles to fill this thing up but one 2-liter bottle at a time would take all day so I've got 10 lined up that we can do it once and then we empty and start over and see how many times we have to do it these bottles are set up to do one bottle then fill the next one then fill the next one so at full of water pressure we've got eight and a half of those bottles of air have compressed into the last one and a half so we're going to let that into the tire to inflate it so now we'll empty it and start over and see how many rounds it takes to fill it up [Music] okay moment of truth four rounds of bottles that's 80 liters of atmospheric air let's see if it was enough we didn't it just filled a tire that was completely flat inflated it using a garden hose nothing but water pressure basically I just spent weeks designing and fabricating so I wouldn't have to walk 50 feet to get an air hose but that's not the point build is about better understanding and evolving learning and doing if that kind of thing sounds cool to you please like subscribe and that way I'll see you in the next video [Music] [Music]

Channel: Quint BUILDs

Views: 4,806,420

Rating: 4.8889327 out of 5

Keywords: Mark Rober, Smarter Every Day, Veritasium, Ideal gas law, pv=nrt, air compressor, inflate, tire

Id: 5Da2qVntopk

Length: 5min 25sec (325 seconds)

Published: Sun Sep 01 2019

Reddit Comments

[u/dov69]

This vid has better mic work than 99% of youtube tutorials...

[u/EverythingSucks12]

We did it!

Haha yeah no problem, glad I could help

[u/billychasen]

Being an engineer is about spending inordinate amounts of time to eventually be lazy.

[u/philmarcracken]

Honestly didn't think the water pressure would make it past even half the bottles

[u/system3601]

Amazing presentation skills. Really educational and fun.

[u/2naPants]

To the people saying not to do this because it will get water in your tires - IT’S JUST AN EXPERIMENT to teach you about pressure & displacement. When you were a kid you didn’t build a baking soda volcano with the thought that you would be building an actual goddamn volcano in your backyard. That would be bad. Your neighbors would hate you.

[u/ThunderGrip]

This was fun and very insightful. Thanks for the lesson!

[u/wallyslambanger]

The 45lb weight transition from standing to laying beside the tire was really nice

[u/BdayEvryDay]

atmospheric pressure at sea level is 14.7 PSI not 15PSI like he says. This guy is a fucking fraud.