6 Unauthorized Uses for a Medical Oxygen Concentrator

[@Nighthawkinlight]

This video has been dubbed using an artificial voice via aloud.area120.google.com to increase accessibility. You can change the audio track language in the Settings menu. Este video ha sido doblado al español con voz artificial con aloud.area120.google.com para aumentar la accesibilidad. Puede cambiar el idioma de la pista de audio en el menú Configuración. Este vídeo foi dublado para o português usando uma voz artificial via aloud.area120.google.com para melhorar sua acessibilidade. Você pode alterar o idioma do áudio no menu Configurações.

[@fredashay]

I'm sure any doctors watching this are cringing, lol. But for $300, that machine is probably only producing between 2 to 5 LPM (Liters per Minute) pulsed flow. If you want a big badda boom, you should get a hospital grade 10 LPM continuous flow unit, but those cost between $3,000 and $5,000 and may only available by prescription depending on your country.

[@aychemara]

How about using this machine for deep water culture to see how extra oxygen works on the plants ROOT zone. If I could get that machine for 75 bucks I would like to use it in deep water culture.

[@SullySadface]

Can't watch this in English since you set Spanish to the primary language and I'm not about to watch an ad just so I can get the link to the English audio stream. In short thanks for gatekeeping. And for anyone who just says "lol learn Spanish": soy tan fresco que puedes chupar mis huevos, swag.

[@0therun1t21]

I don't want you breathing polyethylene fumes but I love your video.

[@TriunfoGim]

We really apreciate it a lot. Thank you for the video and dubbing.

[@JarlSeamus]

I'm a Biomedical Technician. I have repaired those many times. Those small household units are designed to provide between 5 or 10 Liters of O2 per minute, a fairly low flow at a very low pressure. They're cool for messing about with, but don't really produce enough oxygen to do any welding or cutting. What they WOULD be fantastic for, however, is home brewing. Meads, Beers, and Wines require a lot of oxygen in the wort/must to facilitate healthy yeast growth in the initial stages. Putting an aquarium bubble stone on the tubing you could hyper oxygenate your must for really active yeast growth.

[@herzogsbuick]

😲

[@bertjesklotepino]

you sir are a genius. Btw, do you have any idea which brand this is, perhaps a link where to buy one? I tried google, but i then get unbranded results. Price ranging between 300 and 500 Euro (im dutch... but thats roughly the same in dollars, very very roughly ) I cant imagine that they work, because if i look at the price for one at a medical supply shop it is around 2000 Euro. Anyway, if you have an idea, or perhaps a link, would be muchos appreciados (a stupid dutch guy who cant even speak english trying to speak spanish. Go figure.)

[@dh2032]

@@bertjesklotepino it real use medical, and medical stuff tends cost, but also fall out minimum uasable ness, so as long your doing medical stuff, finding medical stuff e-waste recycler, or before it ends up as e-waste first, and just live with less than 101% usability may be even free it lucky

[@dh2032]

would it work at high altitudes, or do they still a descent level O2 to start with?

[@JarlSeamus]

@@dh2032 The way they operate, there is a vessel with glass beads inside coated with a resin that binds O2 molecules under pressure. The unit cycles back and forth between high and low pressure in the vessel binding and releasing oxygen. Via a series of solenoid valves it sequentially vents the waste air out to exhaust, and the concentrated oxygen to the output nozzle. At high altitudes it would still work, the percentage of O2 in air is the same, it's just under a lower atmospheric pressure. So you would still get 95% oxygen out just at a reduced flow

[@Chris.Haines.]

Seriously this man is the teacher every child needs to instill the wonder of the world. My son and I have been watching him for years and now he is 16 years old and we still smile laugh and giggle as much today as we did when he was 10. I have used so many things from this channel to better our life experiences. Especially the waterproofing trick with silicone and naphtha for our camping trips. Always great content and always a joyful learning experience. Bravo!!

[@Nighthawkinlight]

Thank you! I love hearing my videos are used for that purpose.

[@jameswalsh6727]

I home school my son and we watch these videos together too. They're good for teaching physics, chemistry and engineering. It's good to encourage inventive minds.

[@thehulkamaniabrother2.089]

Yeah except he's not 10 anymore and he's gonna use this knowledge to make drugs and kill someone else. And guess who will be responsible. That's right you will. Then nobody will be laughing or giggling ❤😮

[@Chris.Haines.]

@@jameswalsh6727 I totally agree. If you make it fun and interesting and not a dreary task they will run with it and want to learn. Good on you for home schooling too that is super impressive!

[@matthewellisor5835]

A wise man is known to have said that the world will never starve for want of wonders, but only for want of wonder.

[@andrebartels1690]

Since the oxygen comes out at virtually no pressure, I believe it might be a good idea to use a normal propane torch that is designed for plain air, and provide its suction holes with the oxygen. I would like to see how bright a gas lantern gets when the mantle is provided with oxygen 😮

[@dennisford2000]

Reason why cars don't have oxygen tank for the engine , is the valves would catch fire . I believe the amount of fuel is set for max and it would get hotter , but leave lots of hot o2 to burn the mantle . Uncertain if it would last long .

[@GilmerJohn]

Well, the process that produces the O2 actually generates it at high pressure. At high pressures, the nitrogen is absorbed by the molecular sieve material.

[@richardmccann4815]

​@@dennisford2000That's ridiculous! The valves wouldn't catch fire!

[@nobodhilikeshu4092]

@@richardmccann4815 Having pure oxygen anywhere near the combustion chamber is a horrible idea even if the valves don't burn. It would likely rust out the cylinder walls over time, cause a horrible knock from detonation, and it probably could actually cause internal parts to catch fire, maybe not the valves but definitely something like the rings. Tolerances would grow to the point of malfunctioning, and then something would end up creating a nice new hole for the engine to breathe through.

[@VyvienneEaux]

I have the same unit and I find that the oxygen output pressure far exceeds my max measurement capabilities of 23 cmMeOH. In other words, there is some moderate pressure to the output.

[@Coolnventions]

I really wanna see a gen 2 of the cutting torch with the nozzle and a proper gas ratio.

[@MichaelMantion]

and 2 o2 concentrators to provide double the volume.

[@stapuft]

my step dad did just this actually, he didnt need but just a little o2 to aid with the fuel he was already using to blow glass, and was tired of buying o2 tanks, so he used my moms old concentrator, and adapted it to work with the standard glass blowing tubes he was using, that had a commercial blow-back repression device on it, and it worked quite well for him for many years. but i too would LOVE to see something that works on mostly o2 as well!

[@laserdiode]

The torch would have worked better if the nozzle was made out of a single smaller diameter pipe similar to the one he made for the hho generator

[@bashchelik100]

glasslinger...

[@jeremiahbullfrog9288]

@@MichaelMantion or store a bunch in one of his homemade gasometers

[@agostinodibella9939]

This makes me appreciate the significance of oxygen’s role during combustion and how serious it can be when using equipment like this.

[@travisgale5558]

It's pretty significant. As in nothing will burn without oxygen. That's why it can rain methane with lightning and the whole planet or moon doesn't go up in flames.

[@supertornadogun1690]

@@travisgale5558 Well you can get a burn with fluorine or chlorine.

[@Pabz2030]

Because "Fire" (combustion) is rapid oxydation. While an explosion is very rapid oxydation. That's why explosives have to contain an oxydizer mixed throughout to provide sufficient O2 to the ongoing oxydation process without recourse to atmospheric O2 (whihc would be too slow to cause the rapid combustion needed to go bang). It's also why the throttle control on your car actually controls the air flow not the fuel flow which is controlled by your engine ECU based on the air intake flow meter.

[@TheDevicemanager]

hydrogen peroxide is used in the spacex launches still. its used as an oxidizer. same stuff used in the xmen movie when they used the modified sr71 blackbird for extra punch

[@wills708]

This is proper man’s KZbin before bed watching , love it

[@bonecholampworks]

These are commonly used in glass working with propane. Much easier than tanks. I have two! They can often often be had at a bargain. Once they reach a certain amount of hours, they're no longer allowed to use them for medical use, so they're "decommissioned " and sold for other purposes...in my case lampworking, glassworking. Very cool video.

[@jdog4534]

Nice tip! Where do you find the decommissioned ones?

[@timothys8636]

Sometimes, "they" are slightly unforward with decommissioned, (deemed unsatisfactory or unsafe) medical equipment lol... sigh.

[@CRneu]

The same goes for battery backups for medical devices. You can grab really high quality lithium batters with like 95% health for absolute bargains. Once the batteries reach a certain number of hours/cycles they're swapped out.

[@timothys8636]

@@CRneu [[wistfully, fighting tears]] sigh.. * --You-- ..may be able to.. (sniffle..) Be sure to grab some good outsize primary Liffiums cycling outta AED units for me, too... just in case you might ..need .. (hmmtt) a stable 3 + volts, for like, ever..(avoids outright sobs) Cause I mean t t triple A's are f f fine, in my flashlights, too... I just buy shirtloads of 'em, sigh.. exact same price as double A's, you know.. very thoughtful of the design engineers that way 🤥... F-Fuh-Fuh-Fuh-fuh-fuhfff......sighh..(you know the sound.. snot all😪🤧.. lolol)

[@jdog4534]

@@CRneu how do you get access to such deals? Where are they sold to the public?

[@justinoblanco]

I wear iron-powder oxidizing toe warmers in winter (hot hands). They get significantly hotter if they're outside my boots, due to the extra oxygen. I'd love to see what happens to them in an 95% environment.

[@MRblazedBEANS]

Why would their be extra oxygen in your boots? Most bacteria is oxygen consuming meaning oxygen levels in your boots would technically be slightly lower then normal air.

[@3xeplodng_3agle_studios]

@@MRblazedBEANS read it again. 😉

[@Teuwufel]

@@MRblazedBEANS Outside the boots, not inside.

[@ApostleOfCats]

@@MRblazedBEANS read it again bro

[@aurimasvaiciulis7202]

​jho😊😊iiihjjjj😊jiij😊ijhijihjjjjjiiyibiiujji😊jvuv😊jjjujiiiv😊

[@skernilmpmcplorgins2185]

when you use a oxygen acelerated flame, the flame should appear blue/green when it has the right amount of oxygen. not having a nozzle also probably prevented it from focusing on one point as well. In my welding class we used acetyleyne fueled torches, and were taught to adjust the oxygen until the flame appears blue with a small white cone at the tip of the nozzle

[@melody3741]

Its not about focusing, its about mixing and turbulence.

[@kerriadereth]

I'm a glassblower and I use an oxygen/propane torch very much like what you tried to make, here. You're reinventing the surface mix torch! Swap the feeds on the oxygen and propane so the fuel is surrounded by oxy instead. For a better second version, use smaller tubing so you get higher gas velocities. 🔥

[@wb5mct]

Very cool! You did several things I've never thought of! To get high flame temperature your torch needs to mix the fuel and O2 before it reaches the flame. Normal torches do this, and use a nozzle with a small diameter throat and body with high thermal conductivity to prevent the flame from flashing back into the mixing chamber. The small nozzle diameter increases the mixed gas velocity and the highly conductive nozzle body quenches the temperature, thus preventing flashback into the mixing chamber. If you try this, be sure to limit the volume of the chamber and make the chamber sturdy so that if you do get a flashback it doesn't explode! I have an old, much bulkier O2 concentrator that I use to feed a small commercial torch. It works great with propane fuel for glass blowing and for brazing and silver soldering. BTW, the medical tubing for oxygen use is vinyl with a teflon liner that resists propagation of any internal flame. This makes it safer, but difficult to use with normal barb fittings because it doesn't stretch like plain vinyl tubing.

[@christopherparis6841]

Omfg come on fkn all that typing for tf what please? Jfc. Lower than tip inlet holes are the onlyeason the flame gets hot enough to need heat removed before damage by neglect n stupid operator error supported by clear intent of confusion proven with personal commitment and repeat failures, way more failures than even rumple fkn stilksen would ever prove some stupid slow run forest run

[@kathleendavis2008]

@wb5mct....I'm a nurse and didn't know that the O2 tubing has a mix of product that doesn't propagate a fire. We r just taught that signs have to b posted for no smoking, oxygen in use. Thanks for the info.!

[@wb5mct]

@@kathleendavis2008 next time you discard a cannula take a moment to dissect it and pay attention to the construction and materials. You don't normally see the double wall nature of the tubing because it's fitted with a molded connector. Also check the materials used in the nose piece; the one I'm looking at now is made from soft silicon rubber which is also highly flame resistant. Oxygen safety is definitely not a joking matter: a fire in an oxygen atmosphere is scary as hell!

[@leokimvideo]

Everyone seems to forget how dangerous Oxygen is, so many accidents related to the mis use of Oxygen

[@JamesChurchill3]

Oxygen is incredibly dangerous. Everyone who has come into contact with it has, or will, die.

[@commiedog425]

Mis

[@west_park7993]

3 american astonauts died because of the deadly combination of oxygen under pressure and an electrical short. a soviet cosmonaut died in pure oxygen fire as well.

[@brianburke7440]

Oxygen is so reactive that when a welder uses a cutting torch to cut steel once the steel is hot enough the fuel can be turned off and the cutting only needs the oxygen because the steel burns, the steel becomes the fuel. That is why welders call this BURNING, look up oxygen lance.

[@cmk8477]

Careful in saying how dangerous oxygen is…. Some activist group may try to have it banned😂

[@samsawesomeminecraft]

I know a chemistry professor who does glass blowing on the side. He has access to a pair of larger oxygen concentrator units that supply enough oxygen to run two oxygen-propane glass-blowing torches for a workshop.

[@RS-ls7mm]

I think the glass blowing community has been using these for a long time. Plenty of out of date concentrators are available.

[@derkeksinator17]

Thunderf00t has one as well, I think

[@Ma_X64]

I was told by some glass-work enthusiast that those concentrators are really popular now among glass masters because of antihuman prices on bottled oxygen.

[@RS-ls7mm]

Just don't buy one from Amazon or eBay. They are fakes since you can't legally sell a real one. All they do is blow air.

[@PeasantGlass]

Yea concentrators are the way to go. You need way more lpm and purity tho than he has.

[@juxxtapoz]

You should do an experiment where you place those air activated hand warmers into a high oxygen environment. It should cause them to get overly hot since they work off oxygen in the air.

[@robertsmith2956]

I had a freind plug his hunting socks into the glow plug output of the power panel while out flying in the snow. Went from ahhh, to hot hot hot foot in about 2 seconds....

[@cata2d]

Curious to see if that reaction gets past 57 degrees Celsius. It shouldn’t, as far as I know, but will it?

[@johnseed4104]

@@cata2d why would it not get past 57 degrees? Its just fine iron fillings rusting really quickly, as far as I'm aware that reaction can go way above 57 (the hand warmers might be designed to not go above 57 in atmospheric oxygen, but with an unlimited oxygen supply it should get way hotter, add a catalyst and you've got thermite)

[@marvinhuth4487]

@@johnseed4104 i think @Cata is thinking of those phase change Sodium acetate trihydrate heatpacks.

[@NFTI]

I did that on TKOR once, it definitely got hotter! I bet NHIL could come up with some good variations on that experiment.

[@BaldSasquatch]

Two things come to my mind regarding your request for ideas: 1. Add a storage volume of oxygen, something simple and easy to "recharge". A tall clear cylinder, purge it with the concentrator for awhile, then feed water into the bottom to pressurize and push the oxy out at a higher pressure and flow. Makes a very visual addition. Add a bubble U loop to keep flame from being able flash back into the cylinder. 2. Use a hotdog or sausage as the "fuel". Core it out so you can feed oxy thru it like a rocket. Once it's done you can cut it up and let everyone enjoy some "rocket sausage"

[@tonychan647]

Try baking various flours into various density breads with little leavening agents to carve out nozzles geometry. ( And\or to replace the pasta fuel chamber). My nieces would make fun of their male cousins lol.

[@tinknal6449]

Why not just figure out a way to collect it with an ordinary air compressor?

[@FirstLast-vr7es]

@@tonychan647 Hard Tack. That stuff practically crystalizes when you bake it. Bone dry too, and very few voids.

[@emertonom]

Yeah, this was where my mind went immediately too--I believe Mythbusters did a salami rocket at one point. So maybe an easy idea for kids to experiment with is just different foods as fuels. Any food that's fairly rigid, but that you can make a hole in, could be a fuel here. And the kids could form hypotheses about what will make for the best rocket, and then test them out. High energy density is one obvious thought (so, maybe cheese?) but homogeneity is probably pretty key to maintaining a steady flow and reaction. What about water content? Would that make, say, an apple better or worse than a sugar cube with a hole drilled in it? Water absorbs a lot of heat in changing state, but it also expands tremendously. I think there's a lot of kid-potential there.

[@benwalters9222]

What do u mean by a bubble u loop?

[@cberge8]

If you install a flow meter/needle valve on the output and lower the flow rate to around 2-3lpm you can usually get the o2 concentration up closer to 95-98%

[@MrTaylork1]

You can’t get above 95% oxygen because ~5% is going to be Argon. The molecular separation doesn’t separate out the argon. Only the nitrogen and some other trace gases. I work repairing oxygen concentrators

[@cberge8]

@@MrTaylork1 I just went check the data sheet on the unit I have, and you are correct, it shows the max o2 concentration is 96%. There is also a tag on the unit from the last inspection that was done by a very reputable medical device company that shows the o2 concentration was measured at 98.5%! Lol, guess it was done on a Friday and the tech performing the inspection didn't know this fact.

[@allangibson8494]

@@MrTaylork1Argon is 0.93% of ambient air. Zirconia oxygen concentrators will deliver 100% oxygen because oxygen is transported through the Zirconia and nothing else.

[@jercos]

Your sheer joy in discovery, even at an impressive failure, is contagious.

[@taylanbbb]

I would strongly recommend putting a flashback arrestor on your set-up. It prevents any flame from getting past this system. They are not that costly and with a few fittings it should be perfect for your set-up. Anyway, I enjoy your videos. Stay safe.

[@algorithmae]

Not gonna lie, I got pretty nervous during the tube burning part and the propane torch part without any flashback arrestor!

[@DreStyle]

@@algorithmae both gasses wont burn without eachother

[@Ronirvan]

If Fidel Castro ever turned out to be a chemistry teacher.....

[@caaarl2707]

now thats an underrated comment!

[@tfogelson3139]

Or a younger Sen. Ted Cruz of TX

[@prime-mate]

Yep .. totally thought this was Ted Cruz doing science 😂😂

[@Nommicus]

Rofl should be pinned

[@Eloy-m5x]

Si. Fidel Castro .

[@SteveSiegelin]

I learned this setup from a jeweler years ago on KZbin and I've been running my map system like this for a long time. It's actually how I managed to make rubies for the first time. After that I started playing with the laser method and then I did solar concentration. I washed yours on microwaving and had made some comments on the oxygen concentrator before. Glad to see you finally found one 👍

[@SteveSiegelin]

Just so you understand my setup. I bought a map oxygen setup and then just quit using the oxygen bottles and slid the too bright on the oxygen in Port and zip-tied it on there

[@Nighthawkinlight]

How did solar work for you for rubies? I've been planning on trying that sometime.

[@SteveSiegelin]

@@Nighthawkinlight not too well! I couldn't use my big presnell because I broke it but the little ones managed to work. I had a janky set up and only had a little bit of time. I also tried using magnifying lenses and they work. Happen to have some old lenses from a projection TV that I've used as well. I just never have the time to be able to put into them. Much light trying to turn my anode and cathode into counter-rotating fan blades on my ionic lifter. I just never have the time. That's why half the time I just tried giving me idea to someone else that does have the time and can make a video out of it. Most of the time I do have are donated to my hydrogen reactors which I have finally reduced down to the size of a beer can and produce quite a few liters per minute. Even managed to print one of the prototypes and it survived quite a few Cycles for I let it overheat. Most of my time and extra money are going to the anode and cathode material which is going to cost me over seven Grand in rhodium!

[@SteveSiegelin]

@@Nighthawkinlight I still haven't tried the microwave method😪

[@nineteenfortyeight]

The hell ... we live in a time when people are learning from KZbin how to make rubies at home using old medical devices... god is great ... or something.

[@cimachu]

For the pasta demonstration, maybe you can make your own pasta shapes from dough! Dough has really similar properties to clay in a lot of ways so you could make any shape of pasta with any shape of nozzle you want! Waiting for it to dry or baking it dry may have some issues, but depending on the recipie you could probobally just use the fresh pasta without drying it. Plus you can cook your rocket pasta and have a nice meal after!

[@symphonyofdistraction]

Yes! This!

[@juliusfucik4011]

Just letting it dry will produce the typical store bought noodle look. I do it all the time when I make fresh pasta. May take a few days for chunkier designs.

[@HenryLoenwind]

And you can for one end into a nozzle, which would look much more interesting than the big lump of clay.

[@benni736]

With some kind of negatives, e.g. from 3D-printing, you could also demonstrate different core burner geometries and their behaviour. Maybe use a smaller diameter nozzle and/or higher gas flow to increase the chamber pressure. The moisture in partially dried pasta dough may even contribute to thrust in a meaningful way!

[@Xw3dn3sd4yX]

I love that even though the propane + oxygen + variable flow rate didn't heat the steel as you had thought, you kept all of this footage here! I love that you show the whole scientific process.

[@secretmountainlaboratory]

A GTT Bobcat glass blowing torch is designed to run on propane and oxygen, but has a good efficiency and allows for it to be run with a decent quality air unit like yours.

[@kerriadereth]

He's also got the propane and oxygen swapped for a proper surface mix torch. Kinda funny how he's reinventing lampworking torches though!

[@rekire___]

A wise man once said _"Perhaps The best oxygen is the one we made along the way"_

[@Nighthawkinlight]

That's over my head

[@Dillbeet]

@@Nighthawkinlight perhaps it’s a meme reference to “maybe the real treasure is the friends we made along the way”

[@thedude7726]

@@Dillbeet LMAO yeah it is. Yall dont have many friends huh

[@jerrywhidby.]

I didn't know that men created oxygen under normal circumstances.

[@XDarkGreyX]

​@@Dillbeet i think most of us got that.... Still too deep for me.

[@raistnox]

For your pasta rocket maybe encase the noodles in clay entirely so they can combust fully, and perhaps try compressing the enriched o2 so you get a higher initial speed of the gas flow. Could be that the exhaust gases are pushing the o2 back down the line because of low pressure

[@beardjuice]

If you then fill the pasta with spaghetti... you get a longer burn time.

[@geoffreyentwistle8176]

If you were ambitious, you could also stack the pasta and potentially get a longer burn time on the rocket.

[@williamine]

Hi NightHawk! In one of your previous videos you said you still read all the comments, so hopefully you read this one! Sorry it's a bit long. I've been watching your videos for I'd probably say about 12 years. One of my best memories was building your PVC Hairspray rocket cannon with my best friend in my backyard when we were probably only 10 or 11 years old. I actually still have it to this day, although its seen better days. Whenever you'd release a new project I'd always excitedly show my dad and pester him about building it with me, to which he'd usually reply that I probably didn't even need his help, but he'd be more than happy to pay for whatever it was that I needed. I'd excitedly bike to the local hardware store and grab everything I needed and made my way home getting confused looks from people wondering why an 11 year old is biking around plumbing equipment. You've definitely inspired my love for science and engineering and have provided me with some of the best times on my summer breaks. Even now at 21 I still get excited whenever I see a new video from you, and still think about trying some of them myself. It's pretty wild that I've been watching your videos for over half of my life at this point and have yet to get bored. Thanks for doing what you do, and I hope you never stop.

[@Nighthawkinlight]

Thanks Will!

[@eugenetswong]

Will, thank you for sharing your experience. Congratulations on your scientific success. I wish that I could get around to making these projects.

[@devenrobinson6861]

@@eugenetswong stop wishing and start doing. Everyone starts somewhere after all. Sometimes to do a project all it takes is your imagination of what you can do with the materials around you.

[@eugenetswong]

@@devenrobinson6861 That's great advice. Often times, we can't really plan for things, so we might as well just get started. Carp diem! That being said, I'll just up vote these videos, and find something less flammable to do. I'm thinking of upcycling old furniture that could use some TLC.

[@BariumCobaltNitrog3n]

@@eugenetswong You don't have to seize the day, you can acquire materials at your leisure and make plans, draw sketches until one day you have a water balloon that burns concrete or backyard rocket bottle. Be safe, have fun. If it is clear you know what you're doing, others might approve.

[@gentlebear21713]

I have a couple of ideas you could try. 1) you could insert a y into the line prior to the exit to attach your propane line into. Then insert a smaller diameter metal tube into the end of your brake line to increase the velocity of the O2 gas being forced out of the end. This would also give you the flexibility to increase or decrease the proportion of propane relative to the amount of oxygen being produced. 2) try a flowing the oxygen over a couple of drops of oil to see if if would spontaneously combust. (All oxygen valves and components have warning labels on them not to use any oil for precisely that reason). 3) pure oxygen blown through a lit cigar will produce a bright red flame like a road flare..it's kind of cool to see. ( as a former medic we used to play with pure oxygen by taking a big breath and blowing it back out through a cigar) Note: sodium silicate is used as a refractory material, therefore you probably won't get any burning of sand in that temperature range

[@kennymik1509]

Its refreshing to see someone genuinely enjoy doing what they love to do. Thanks! Keep it going!

[@scottmarshall6766]

I'm a high power rocket flier and engine builder from years back, mostly APCP, but have played with hybrids (N20 oxidizer) a bit. You can simply machine a graphite nozzle with a drill motor if you don't have a lathe (messy but easy to do). The other option is a rammed bentonite nozzle, It used to be Harry Gilliam at Skylighter had tools available, but sadly he is no longer in business, if you do have a lathe, they're not hard to make. There is probably info on this on the fireworks forums or PGI discussion groups. One thing with hybrids (and most cored motors) is to ignite them at the oxidizer inlet end. With your rigatone fuel, a match head and piece of nichrome wire would make a great electric igniter.

[@riuphane]

I showed this to my daughter (7) who's really interested in working for NASA when she grows up and has seen this kind of condenser at her grandma's house (and now understands why there are all the flame warnings). First question she asked was why you didn't wrap the whole noodle with clay "like a real rocket". I didn't know, so thought I'd ask you.

[@Nighthawkinlight]

I like being able to see thorough the noodle

[@vjnobody]

It would burn longer, I agree.

[@holidayrap]

Your daughter is brilliant!

[@riuphane]

​@@Nighthawkinlight I kind of figured. We revisited this tonight and I asked her again about your experiment. A few things she suggested were to see how different noodles work (maybe different thickness/width or ingredients), different lengths, lighting them from the other end (if possible), try covering the outside vs leaving it exposed like you did, and maybe try a slightly dryer clay. I can't say any of these suggestions are helpful, but I thought I'd share and I hope this is valuable. As for forming the different types/shapes of nozzles, would a 2 part press (like how leather hole punchers work) pull it off? Could also have different ones pre-made to show how different designs affect the thrust? Not sure, just throwing everything I have out there to see what helps. I really want to see what you can do with this demonstration

[@riuphane]

​@@holidayrap thank you, I was impressed

[@IparIzar]

One way to add variability to the rocket would be making your own pasta bodies, the recipe is simple, can get the kids involved a little bit more in the creation of the rocket, experimenting with the ingredient ratios. You can also make them a little bit thicker so they last longer, since you aren't concerned with getting the wole thing soft to eat.

[@RFMongoose]

Yeah, my initial reaction was that the gas isn't being mixed. Your improv torch there also doesn't have anything to hold the flame, which means you're simultaneously risking blow back, as well as blowing out your flame. I think the ultimate issue here is just the lack of aspiration (if I correctly understand the term). But that whistling may have made me pee my pants a bit, I thought it was about to blow back.

[@jtjames79]

One advantage of oxygen concentrators is they don't hold a very large supply. It's just a pump that squeezes air through a molecular mesh. It's a fire hazard but not really an explosive hazard.

[@peterjf7723]

It's just oxygen, so nothing to blow back. Oxyhydrogen is the type of torch that can blow back if you're not careful.

[@motosk8er2]

Not even possible to have a blowback.

[@RFMongoose]

Well, but at the end of the torch it's not just oxygen. There is propane there also. And while a full tank of propane is not going to blow back due to delta p, as that gass burns down the risk of blowback increases.

[@torydavis10]

You're imagining a premix torch. Surface-mix torches are also a thing, and are even preferred for some uses. Though generally, you have several smaller jets of fuel surrounded by an oxygen manifold, rather than a single jet of oxygen inside a fuel manifold.

[@dingus153]

The cutting Lance was pretty impressive considering this is a pretty low end O2 concentrator. The ones we use at work (Philips Respironics) can get up to about 7L/min at 90% concentration. Sounds like it could be a fun upgrade 😉

[@torydavis10]

Oh nice that's actually enough to run a hand torch or smallish bench burner

[@strangelee4400]

What are they used for... people who struggle to breathe? What happens if you don't need one but breathe it in anyway? Basically...is it a cure for a hangover?😅

[@dingus153]

@@strangelee4400 yeah pretty much, basically for anybody who can't breathe in enough oxygen with the amount that's in the air already. Nothing special really happens if a healthy person breathes in oxygen unfortunately, not even curing a hangover

[@stormchaser2669]

When you explained the dangers of using that machine around an open flame and the oxygen creeping into clothing and the bed and likely building up around the body, and then you lit the little pipe cleaner man on fire, I thought back to an incident I researched of a man by the name of George Mott of Crown Point, New York who mysteriously died in 1987 of what some were calling, "Spontaneous Human Combustion". This case was actually featured on an episode of Unsolved Mysteries as well as several other TV documentaries, and the bizarreness of the case intrigued me to do more research on the case. When he (what little was left of him) was discovered by fire investigators in his burnt out bed, an oxygen machine was found in the room right next to his bed and still running despite the intense heat that was produced in the fire that had consumed his body. The big mystery to me though is how the entire house didn't burn down or why the fire never advanced beyond his bed. Anyways, relatives were interviewed not long after the incident and had mentioned that Mr. Mott was a former smoker who had quit. However; on the other side of the bed from the oxygen machine sitting on a nightstand was an open container of long stick matches (also unaffected by the fire) which would suggest Mr. Mott had relapsed. Based on your experiment in the video, I'm thinking Mr. Mott likely had his oxygen mask on and over time oxygen had accumulated and concentrated around his body, in his clothes and bedding, he decided to have a cigarette and took his mask off, completely oblivious to danger he was in. And as he lit his cigarette, he inadvertently set himself on fire as you'd set the pipe cleaner man on fire, and the high concentration of oxygen in and around his body allowed the fire to burn more intensely, reducing his body including his bones almost entirely to ashes, which is actually extremely rare in most fire-related deaths. This video is definitely an eye opener. Thanks for posting!

[@snapdragon8723]

Holy shit

[@TheDevicemanager]

after watching this i conclude the same thing happenned to that old guy. the expirement showed that it burned viery quickly and hot. because it burned so quickly and hot it was out with seconds. with the old guy he probaly burned so fast and hot that he was dead almost immediately. he probably exploded on fire

[@andrewgivens5070]

I dont know, while I agree, this is definitely an interesting hypothesis that warrants further study, I suspect the amount of free oxygen around his body would be consumed quickly. I think there's a lot of variables to consider. The amount of bedding what type of mattress and a host of other factors. Definitely warrants further investigation. But I never believed that that case was "spontaneous combustion", and that is the first hypothesis that's held any water in my opinion.

[@andrewgivens5070]

*Best hypothesis I've heard. There may have been other that I haven't*

[@ChristmasEve777]

I guess I've been lucky then. I've spilled liquid oxygen on my clothing and then I was near an open flame 5 minutes afterward.

[@bwobbles2368]

Rocket idea to maybe try: spaghetti noodles inside the larger hollow pasta tube. Could be placed loosely or maybe fixed in place by getting both noodles damp before placing them and allowing to dry. Varying the position and number of spaghetti can potentially allow you to tune different characteristics like thrust, combustion pressures, burn time, etc

[@mj6463]

Also, since it requires hydrocarbons, I think pla or other 3d printer filaments may work, allowing much more sophisticated design. I’ve wanted to test it for years but never got around to it, parents didn’t love the oxygen tank and fire combo lol.

[@mj6463]

I should note, acrylic works well, so there is some precedent for oil based polymers in this application

[@peterheinzo515]

and how do you combust it?

[@RangerOfTheOrder]

I would definitely love to see a follow-up video on the oxy-propane torch

[@fisharmor]

I have two older concentrators I've been using daisy chained to run a DHC oxyacetylene torch for about 15 years. I've used it to weld sheet up to 12 gauge with no problem. The main thing to look for if you're doing this for oxypropane is that if a regulator isn't rated for propane then it's not safe. There are regulators that use seals that are ok for acetylene but not propane. The TL;DR on this experiment is this: you're not going to weld with propane, you're not going to cut with concentrators, and none of this is going to be portable. :D Oh, the most important thing is, you really want some backflow arrestors in there if you're doing this. ESPECIALLY if you're making your own burners. I think the danger of having your tank explode might be overstated but I'd rather not be a statistic to save a couple bucks.

[@Mark-dc1su]

You know, it might be fun to test out different shapes and diameters of noodles and see how it effects the burn rate. Like, Ziti vs Rigatoni vs Cavatappi.The first two would be testing the effect of the tube's radius, while the latter would be testing a spiral shaped fuel.

[@lacheur]

Should try bucatini! It would have a much higher surface area to volume ratio.

[@harsha1306]

You should also be able to customize your designs with a pasta maker. But making homemade semolina pasta is a lot harder than just picking up a pack from a grocery store.

[@symphonyofdistraction]

Yes! This!

[@nomcopterlabs]

I use a cheap oxypropane torch I bought online with an oxygen concentrator for scientific glassblowing and it works great! Happy to see this video - gives me more ideas for fun experiments to try with it. Definitely gotta try the thermal lance.

[@mikec3820]

running a cc torch 18 years. been lamp working 22years. i wish i could afford a oxy con set up for my studio.. over the years ive seen the t size tanks go from 20/30$ a swap/fill to 80$- 120$ nowadays..

[@Hexcede]

Playing with 90% oxygen fire and burning steel on a wooden table indoors has never looked more fun

[@etle113]

For kids, one could ask them to hypothesize as to what will happen using these variation: Bigger/Smaller diameter pasta. Shorter/longer pasta. The effect of adding surface (roughness: Bronze die extruded pasta vs plastic die) adding length of broken spaghetti or even couscous in the noodle. The effect of the nozzle size. The effect of oxygen flow. The effect of partially/fully cooking the noodle beforehand. The effect of oxygen concentration (if it can programmed). The trust could maybe be better visualized by putting a small piece of foil suspended in front of the nozzle. But one could also have a mean of measuring the length and width of the flame. By hitting a cold darken penny with the flame, one could "measure" if the flame is "fuel rich" (the copper will become shiny pink) or oxygen rich (it will blacken). One can measure the amount/ rate of gas produced by putting everything under a bell jar linked to a grad cylinder flipped in water.

[@uazuazu]

We had a lecturer at Uni who made his own liquid oxygen (because they wouldn't sell it to him). He did amazing demos with digestive biscuits soaked in liquid O2. But anyway one thing he did was have a container of natural gas, and light a flame of oxygen inside it, i.e. have a flame of oxygen "burning" in a natural gas atmosphere, as opposed to natural gas burning in an oxygen atmosphere. Probably a big explosion risk, but I guess/hope he knew what he was doing.

[@RT-qd8yl]

It seems odd that he couldn't buy LO2. My high school welding teacher had it delivered to the school for our building's manifold system once a month, this was back in the early to mid 2000s.

[@jeffreyfarrington4299]

welding teacher supply chain more compatible with income generation/ science takes a back seat unless its in a $generating wing of a corp ( just my theory )

[@allangibson8494]

Inverted flame furnaces are used in industry. I worked on a nickel brick sintering furnace that switched from an gas flame in air to an air flame in a natural gas atmosphere in operation at 700C.

[@melody3741]

Not an explosion risk unless it actually fills up with oxygen

[@holy3979]

​@@allangibson8494Is that to prevent oxidization? If not I am curious as to why it's done in that way.

[@bobbofly]

I remember detailing a car back in the late 80s. I needed to remove some paint overspray from the windshield & went to tear off some antirust-oil treated 0000 steel wool off from the roll, suspended by the center tube by a nail. Just hanging there on the side of the workbench, right over a half dead car battery. Thought nothing of it & pulled carelessly at the end of the roll, which dropped STRAIGHT onto the battery terminals, instantly igniting the outermost coil. Several lacerations & 2nd degree burns later I got the fire out & saved the rest of the roll. LESSON LEARNED.

[@DoNotPushHere]

About your question with the pasta, I'd strongly suggest filling one noodle with pieces of other noodles Kids can test the size and granulometry of those sizes quite intuitively

[@narayanbandodker5482]

I didn't even know such a thing existed, that just dumps oxygen! Maybe you can pass it through liquid Nitrogen to form Liquid O2 and do some experiments with that!

[@cheaterman49]

That's a fantastic idea! :-) especially in the context of making some rockets, haha!

[@Mix1mum]

It's even easier than that. If you poured liquid nitrogen into, say, an aluminum cocktail shaker in normal atmosphere oxygen will condense into liquid and drip off the outside as condensate. That being said, it's much cheaper to use one of these to concentrate oxygen than any method I'm aware of to extract liquid nitrogen. Maybe I'm wrong, please educate me if I am. I would LOOOOVE to be wrong here

[@moritz584]

Dude I don’t know what it is but I love your energy

[@sparktime2]

For the pasta rocket: if you fill the pasta tube with spaghetti it could have more "oomph" or a longer burntime perhaps. Here in The Netherlands we have fast cooking spaghetti which is holo in the center, that could help with the added back pressure.

[@symphonyofdistraction]

If it was losely packed, it might create more surface area and you might get a better burn ratio with the fuel😃

[@Hi-TechHillbilly]

Have you considered a metal housing for the fuel body? Put the hollow pasta inside. You could even use multiple sizes of pasta to make a layered pasta fuel pellet. Since the pasta is hollow you could still feed oxygen through it. With convergent divergent nozzle I would think the risk of explosion would be minimal considering the fuel.

[@pattheplanter]

You could line the pasta with sugar icing?

[@artro398]

Could also cover the entire noodle with the clay. That should extend the life of the rocket by preventing the gas from blowing out the side, without introducing the sort of hard material he was trying to avoid.

[@lordchickenhawk]

If you soaked the various diameter pasta first you might be able to get a tight fit between layers after they dry back out.

[@bertjesklotepino]

@@lordchickenhawk why not produce some pasta the diy way. And then shape it such that it already has the perfect shape?

[@lordchickenhawk]

@@bertjesklotepino Good idea. It looks like my rocket engine program has been sent back to the ̶d̶r̶a̶w̶i̶n̶g̶ kneading board

[@Rusty-METAL-J]

Don't worry about that exposure level. You have it low enough and the soft color of the flames, makes everything outside the glass container very black and darkened. It really looks like high-end professional cinematography.

[@Rusty-METAL-J]

Those scenes would be great in a scary movie.

[@Rusty-METAL-J]

Thermite doesn't have sand in it and it's Iron(Fe, 26) but not steel. Steel is an alloy.

[@Rusty-METAL-J]

When sand is struck by lightning, it fuses into glass.

[@Rusty-METAL-J]

The pasta jet is similar to vinyl records scatch and pop in sound.

[@CHD2000]

I got one of those for 200 bucks used for my jewlers torch. Its quite common in glassblowing to save on the expensive oxigen tanks. I feel safe around it unlike with tanks of gas. Also don't forget flashback arrestors!

[@Mix1mum]

Why must our overlord glass masters hide this information away from the rest of us, glazier-impaired, unfortunates?

[@Leadvest]

Recently read that it's brazing if the parts have close enough tolerances to cause capillary action, and soldering if you're just using low temperature filler instead of welding. Also found out that torch welding is perfectly viable, and can yield excellent results, and only fell out of favour due to difficulty, and repeatability issues. Probably still a great option for hobbyists, it's just not popular in industry.

[@hxlize4913]

oxycetalene torch welding is still very popular in refineries and other pipefitter industries

[@jannikheidemann3805]

@@hxlize4913 *oxyacetylene

[@melvin6840]

Heck yeah! I much prefer torch welding to arc welding. Easier to control, and no E.M.F.s.

[@Leadvest]

@@melvin6840 Technically speaking flames and plasmas give off fairly strong EMF, and they aerosolize radioactive material. It's important to understand the level of risk and have access to appropriate PPE for the work environment.

[@smallyberbigelbe7571]

Oh my goodness I found you from Cody’s lab, I thought to myself hmm. As a teenager I made one of your soup can forges with my dad and went on to make a couple knives. Your voice took me back and reminded me of those. I’m incredibly excited to learn about what you’ve been learning about in the time we’ve respectively had to grow. My goodness I’m glad I stumbled onto your channel.

[@cheaterman49]

Just a few extremely basic ideas for the rockets: - Use a scale of some kind to measure thrust so that there's something to demonstrate (or make your own with a load cell, that seems more typical) - Cover the whole pasta in clay so that we can have it burn to the end - could matter because I suspect we don't only care about peak thrust but also some sort of integral of thrust over time, to serve as some sort of proxy to Isp (again I'm trying to think of things to teach here :-) ) - Make your own pasta as fuel! I think a custom design closer to a real SRB will help in two ways ; first it will make the experiment more realistic (and you'll be more likely to actually measure some thrust I believe), and second I suspect it will help a lot with repeatability of the experiments - I don't think normal pasta is made to tight tolerances haha, and we need the "boosters" to have a comparable amount of fuel, so that we can... - Vary the nozzles ; in the most basic form, you will care about the throat diameter, but you could also of course try to play with some more experimental designs, eg attempt a clay aerospice (an aerospike that makes pasta tasty :-D ) Great video as always, can't wait for part 2!!! Also as others mentioned, I'd be curious to see a nozzle on your torch, even if only eg hammering the tip of both tubes (inner/outer) down into more of a slit shape, IMHO that would already do a great job of speeding the gases up a bit and perhaps encourage a bit more mixing! :-) EDIT: Typo thrust/fuel

[@tpa6120a2dwp]

Dalibor Farny uses a large oxygen concentrator built from several normal ones to run the torches in his company that produces nixie tubes. He has several videos where he shows how they built the large concentrator. The torches he runs on it are quite large, so for smaller workpieces likely one or two normal concentrators are enough.

[@effingdingus]

Glad you’re still making the same type of videos. Don’t change man keep doing what makes you happy.

[@ITpanda]

Could you 3d print molds and place partially cooked pasta into the mold to get the nozzle shape, Maybe hang pieces partially in hot water? Could also use a price of piping that has been heated to decrease the diameter to a taper.

[@bravojr]

As someone with Welding experience can tell you, You better put a spark arrestor on it.

[@Mix1mum]

Fuuuu, I was scared for him hearing the fuel sputter. I am never as alert as I am behind an oxy/acet torch. It's like an automatic extra d20+20 roll to perception and dexterity. I'm probably sapping years off my longevity (lowering my constitution) gaming my adrenal glands in this manner. But you know, less life overall or lose it all right now? The only way to win is to not play, and that answer, when it comes to oxy/acet, has yet to achieve enough sufficient peer review to be accepted as canonical.

[@killerguppy2988]

For the pasta rocket, I'd try 2 things: 1) Use bronze-cut pasta, not teflon-cut 2) Cut some Bucatini pasta and stuff if inside the Rigatoni, like a set of boiler tubes in an old steam train Both of these will greatly increase the surface area and hopefully release more energy more quickly.

[@GlorifiedGremlin]

If you want that torch to work, you need a mixing chamber. I saw at a couple points that it nearly looked like two separate flames, an oxygen flame surrounded by a propane flame. You have to get them properly mixed into a homogenous gas

[@jasonmurawski4917]

I just skipped though the video so I haven't seen much but oxygen isn't flammable so it would be impossible to have an oxygen flame. What you are seeing in this entire video is other things burning and the oxygen help it.

[@nikkiofthevalley]

​@@jasonmurawski4917 That part of their comment is wrong, but the mixing it beforehand part is correct. It's actually because mixing it beforehand allows a much more even mixture of fuel and oxidizer.

[@therealchayd]

You might be able to get a rocket press used for fireworks (nothing saying you couldn't machine one if you have a lathe). You use bentonite clay (powdered cat litter for all intents and purposes) to form the nozzle in a cardboard tube by ramming it with a hammer, add powdered fuel such as charcoal, ram that down, then finish with an end cap, stick the oxygen pipe in and away you go!

[@timmccormack3930]

He probably has one! His older videos are all handmade fireworks.

[@kjbaran]

Punching divets in that oxy sleeve to hold it center was genius.

[@Beycrash]

I could imagine the torch working much better if you switch tubes. Would be nice to try!

[@PCrailfan3790]

Why does that steel tube look like copper

[@ANYONCE-YTLA]

I thought my eye or my screen was broke, yeah its orange like copper or brass tube.

[@jewtubesucks666]

oxidation maybe? idk

[@bigmango202]

It's the flame reflection

[@56independent]

This is crazy... I can listen to English videos in Spanish now?! Finally, some spanish content i can actually watch.

[@hu5116]

Great vid! Yeah, I think you end a proper nozzle designed for the flow rate you got, which might also need some pressure boost also. Suggestion: it would be a good video to go over how this thing works and maybe also do some show and tell of its insides. Thanks!

[@BryanTorok]

I really would like to see you try the torch from propane/oxygen torch kit. I had one of those years ago (and it still might be around here). It did work, although the flame wasn't very large. The big problem was that the oxygen tanks cost about $15 and only last for about 10 minutes. I've seen these oxygen concentrators advertised on TV and have often wondered if one of these would supply enough oxygen for a small propane, mapp, or acetylene torch.

[@grancitodos7318]

@@qwertymnbvc3082 If you get that flame to heat steel, it will cause hydrogen cracking, and the steel will be crap.

[@grancitodos7318]

@@qwertymnbvc3082 I made the steel crack, so it is not a gas mix to use.

[@nickv1008]

O2 concentrators usually produce less than 5 liters/ min . That may support a jeweler torch or small oxy/ acetylene or oxy/ propane. I have used 5+ liter/min to do both. Volume and pressure will not support cutting. But welding is ok. Glass workers may gang 4 or 5 machines to get the volume of o2 needed. Pressure is low, but compressors are available for them that do about 3000 lbs to recharge small containers. Read up on torch oxygen safety. You can get hurt.

[@dalentoews3418]

Industrial oxygen is 98% pure and at least according to textbooks you need at least 95% oxygen for cutting. For brazing and welding it's probably not as critical.

[@nickv1008]

@@dalentoews3418 oxygen separators ( concentrators) absorb nitrogen from air, leaving oxygen and traces of argon, and other rare gasses to pass through. Usually 95- 98% oxygen, most separators have o2 sensors if it goes below 90% . The nitrogen is expelled and another cycle starts. They work fine for welding. Some large consumers (like shipyards) use separators on site.

[@TgWags69]

I took a date night glass blowing class one time with my wife. The artist hosting the class used propane burners modified with these Oxygen concentrators to heat the glass. It was a pretty slick setup.

[@Codeeez]

No gloves, no ventilation, just living in the moment. Love to see it

[@BionicleFreek99]

I think the torch would work a lot better if you reduced the diameter of the tip to get a higher pressure stream of oxygen.

[@_kwak]

RE: oxygen torch kit. I would recommend a small hand torch kit for your purposes. Jewelers and lamp workers use them for fine detail work. They work a treat and have well machined knobs for fuel mixture. If you want to get super serious, getting a propane regulator would be required. Regardless, love your content, incredibly well produced!

[@gilgoldmuenze2570]

You can use the gas tank, you used to collect the wood gas, to collect bigger amounts of the oxigen and then use a compressor to fill pressure tanks. So you could safe oxygen for later projects.

[@Dixler683]

@gilgold sure thing , try it out. O2 under pressure mixed with fine oil mist from the compressor = bang! Try it .

[@chemieju6305]

The nozzle setup would do great with a thrust meter, either with a load cell or maybe just a spring and a dial indicator. For nozzle designs you might be able to compare some different nozzle sizes, have an easily tweakable variable that produces some different thrust readings. For a more scientific setup, maybe for older children, there are ceramic 3d resins. It'd be cool to have a software where you can play around with 2 or 3 sliders to generate nozzle shapes, then print them out and compare them in thrust and maybe burn duration. At this point idk how well pasta would hold up as the fuel tho.

[@somersthesunless9091]

Truly everything operates according to God’s will lol. First I meet you in a mall while inviting you to church and now I stumble upon your KZbin channel. You were very polite in person even if you didn’t come to study. I hope that whatever needs to happen in your life for you to take me up on the offer does. Thank you for the good content either way :)

[@keithstathem872]

I've been looking at some oxygen concentrators that are intended for welding, I'm not ready to get one yet but they are are pretty reasonably priced. If you can get it working properly with this one that would be an interesting demonstration.

[@joeledwards6587]

Have you considered collecting the produced oxygen in a large bladder and compressing it into a tank for storing more under pressure? Could lead to even more fun experiments :) you could pass the collected gas through a coil in liquid N2 to get liquid oxygen as well

[@ematise]

I went trough the comments looking for somebody that had the same thoughts about compressing the oxygen production into a pressure vessel. And I found 😌;))

[@joeledwards6587]

@@ematise glad to know I wasn't the only one :)

[@andymyers2759]

Nice video dude, always fun to see someone enjoying subverting the original design of equipment especially whilst not indulging in too much health and safety nonsense!

[@domvasta]

If you find more of these, try linking the outputs together, get double the flow rate, I'd also love to see how they work when the output of one is fed into the input of another, can you get 99% pure O2 gas from the 2nd one, or does the mechanism become saturated and can't get much higher than 90%, similar to how it's very hard to enrich the concentration of U-235 from via gaseous diffusion even with an LEU input of 3% U-235 as opposed to natural Uranium's 0.7% U-235?

[@thematronsmilitia]

I'm curious about the practicality of making soft iron(carbon free) on a small scale for electrical projects like transformers, because soft iron and electrical steel aren't too easy to get your hands on in the u.s.

[@Nighthawkinlight]

Good question, I've never looked into that

[@ToeCutter454]

just gotta go down to any beach or creek and find the black sand, pan it out and melt it down and voila! soft iron with a little bit of effort and probably a lot cheaper. aside from scrapping old devices that have transformers in them to salvage the laminated iron cores i dunno any cheaper or easier methods.

[@sangomasmith]

@@ToeCutter454 the phrase "melt it down" is doing a lot of work here. For low-carbon iron you're going to need to first smelt (reduce) your ore into wrought iron or pig iron, then do something like a Bessemer process conversion with it - both of which will need some heavy-duty refractories (and probably a lot of charcoal, ore and flux). You'll also need a lot of skill - even experienced home smelters seem to achieve very variable yields when making bloomery iron, and you're going to be strapping an extra process onto what they do.

[@Caterpie56]

​@@sangomasmith Yes, I've visited a blacksmith that does experiments in bloomeries and even when measuring the weights and volumes of the ore and charcoal, and measuring the CFM of the air from the blower, smelting iron on a small scale is highly variable in the mass and quality of the result. It is fun work though, can be very tiresome as well

[@ToeCutter454]

@@sangomasmith for pure iron you just need to smelt it from the ore(or black sand in this case) into a puddle and let it cool, the processes are for carburizing and making steel and alloys.

[@jamesfenimore174]

Really well put together video. Transition at 15:00 was fantastic.

[@Hi-TechHillbilly]

Do you have an o2 analyzer? That's most likely putting out quite a bit higher than 90%. We had a few that would typically output 95%+.

[@Nighthawkinlight]

I'll see if I can test it

[@Hi-TechHillbilly]

@@Nighthawkinlight that was a former life. I don't remember for sure what acceptable was. Fairly certain it was anything over 92%. I'm not familiar with the one you have. Like I said many years ago in a land far away.

[@AaronHathaway]

Back when high schools had smoking sections, I brought a concealed balloon filled with oxygen (from my father’s oxy-acetylene cutter), walked into the smokers’ courtyard, covertly inhaled the oxygen and asked someone for a drag. Once supplied, I exhaled through the cigarette, which became a blinding, self-consuming flare, vanishing in seconds. Putting aside the fact that it wasn’t the safest of magic tricks, it was sufficiently miraculous that the hapless donor wasn’t upset about losing a cancer stick. [In case it needs saying, I do not endorse or recommend my own actions or idiocy.]

[@kathleendavis2008]

Ty for this video AND the comments. This has opened safe ideas for artwork that I didn't think was possible! 🔥💖🎉🏆

[@samueltaylor4989]

In an oxy acetylene torch, the oxygen comes from around the center hole which supplies the gas. Maybe reversing the setup you had. Also you are probably right that the unrestricted flow is not ideal.

[@TesserId]

Luv that rocket demo. Gotta think of a way to make it... What if someone could make tubular pasta out of one of the clear varieties of pasta, like buckwheat or rice. Maybe, arrowroot can be made into pasta.

[@pnklysmooth9888]

You had me at melting rocks. Can’t wait to find that video. Subbed

[@epicsoupgamer3989]

Very cool to see you still make videos, was a fan forever ago and even remember the pasta experiment!

[@johnfeistner467]

First saw your channel over 10 years ago with your butane dart gun, amazed how far you've come. Love your channel. Also realized I wasn't subscribed and fixed that.

[@paulscottpadgett1996]

Friggin AWESOME video

[@davespangler9125]

Good stuff here. Today begins my hunt for an oxygen concentrator. I really like the idea of coming up with a more interesting kid safe rocket demo. Instead of using the noodle itself as the combustion chamber, maybe it would be worth trying to form clay around various forms and trying different shaped/sized noodles as the fuel. That would allow you to use the same easy to make nozzle design. If I'm able to find a cheap machine, I'll do some tinkering.

[@1978garfield]

I have seen people on line run small oxy propane torches on Medical Oxygen Concentrators. The torches are cheap enough there is no point building one unless you just want to. I have had my eye out for a Medical Oxygen Concentrator ever since I say someone run a torch with one. I have a plasma cutter now but oxy propane is great for when you need to heat and beat something into shape. Try a morning glory sparkler in the oxygen. I suspect you know what they are since you roll your own. They look cool and use bamboo instead of steel so they wont break your glass. Great video!

[@syriuszb8611]

Convergent- divergent nozzle is only good when you approach exhaust speeds about mach 1. In your pasta rocket it's better to stick to traditional convergent nozzle.

[@jpjay1584]

23:28 nice image for: "the performance is over"

[@richardbaumeister466]

There is a band instrument repair technician on KZbin that uses an oxygen concentrator to "fuel" his oxy/propane torch to repair brass instruments for both heating and silver soldering. His name is Wes Lee. He uses a Jewlers torch

[@CuriousClayPlays]

Oh yeah and I forgot to mention I have hooked my o2 concentrator up to an oxy acetylene or oxypropine torch kit, both the largest sets and the small portable ones that use disposable canisters. the small canister types a worked well between two or three liters a minute. Something the it could keep up with, with out breaking a sweat... It actually did pretty decent on a full oxy acetylene setup using higher flow rates so you're definitely onto something there. Fun video!

[@TheParkAttendant]

Okay, my friend. You've sunk that hook in me 2 or 3 times now. So, I'm now a permanent subscriber. Keep that content coming.

[@Reach-out--]

Tʜᴀɴᴋs ғᴏʀ ᴡᴀᴛᴄʜɪɴɢ sᴇɴᴅ ᴀ ᴅɪʀᴇᴄᴛ ᴍᴇssᴀɢᴇ Sᴏᴍᴇᴛʜɪɴɢ sᴘᴇᴄɪᴀʟ ғᴏʀ ʏᴏᴜ!! Hᴇʟᴘ ʟɪɴᴇ ɪs ᴘʀᴏᴊᴇᴄᴛᴇᴅ ᴀʙᴏᴠᴇ ,ғᴇᴇʟ ғʀᴇᴇ ᴛᴏ ʀᴇᴀᴄʜ ᴏᴜᴛ .......

[@Nilhilustfrederi]

the "Frosty T" ejector burner design seems like a perfect fit. it entrains and mixes ambient pressure air, it's cheap and easy to make, and possibly trivial to adapt to enriched air just by doubling the orifice diameter

[@DJaquithFL]

I always wondered if these concentrators actually worked or were just BS. That's my biggest takeaway so thank you.

[@canidsong]

Those Amazon return liquidation shops are great. I used to be the assistant manager at one so I got to see everything that came through.

[@ethbri49781]

Pure oxygen environment and a spark on some Velcro is what doomed Apollo One. Never appreciated how quickly that could have happened. Thanks for the great vid @Nighthawkinlight