Since your channel has grown so fast, I would like to see a video where you explain your background so that we understand where all your knowledge comes from
I don't think you mean this comment rudely but I can't help but think that it sounds as if you are saying since he has grown he now is obligated to explain his credentials it's my opinion that that's none of our business
I agree with you to the point that it would be really interesting where all you knowledge comes from but even more why you do all this "crazy" stuff. I mean, why do you build all these very different things, just for fun? What's driving your ideas and projects? But, and that's where I disagree, this has noting to do with the groth of the channel. I think I know how this was meant (maybe), I guess what you (hopefully) wanted to say is that now that the channel is well established he may have some time to do a video about more "normal" things like telling us about his life and motives ... :-) sure. this would be interesting for many of us!
And then they proceed to expose us to the horrible sound. The difference between the vocal volume and the engine volume was considerable; perhaps you would consider a limiter or gate on your upper volume threshold?
As a now 40 year old man who never knew my father or had any other male figures in my entire life what so ever, please let your son know how incredibly lucky he is to have a dad like you. Shit I'm 40 and I wish you were my dad. lol
#metoo This might be a common thread among viewers. Thanks to youtube and tech ingredients I can fill the dad hole in my heart with incredibly well explained father-son science projects!
I love how obvious it is that they genuinely enjoy what they're doing. They're not doing it for the views or ad clicks, they're doing it first and foremost because they love it, and it really shows.
Lol It turns out i live 10 minutes away from him found that out after realizing I have the same view and then I saw his house and relized we live on the same road
Pretty sure you could if you had it set up to direct all the air onto the ground. They have jet driers already that are mostly used to dry up race tracks after it rains.
The first turbocharger turbojet I saw was at a railway equipment show more than 20 years ago. A platform mounted on small rail wheels had two of these jets on one end aimed down at a 45 degree angle. the machine was used in railway switching yards to blow snow and ice from the switches to prevent them from being frozen in place. The jets didn't propel the platform. It was pushed from switch to switch by another vehicle. I have been fascinated by turbocharger turbojets ever since.
I've always felt that science without engineering is of limited use. I love how this channel demonstrates science concepts in the context of complex applications. Science communication needs more of this!
A TRUE TEACHER WHO CAN TALK IN COMPLEX TERMS.... BUT IS STILL ABLE TO SHARE UNIQUE AND VALUABLE INFORMATION TO THE "LAYMAN" LIKE MYSELF! I CAN'T GET ENOUGH AND I'M WATCHING OVER AND OVER AND OVER TO TRY TO UNDERSTAND THE CONCEPTS AND TECHNIQUES SO I CAN USE IN MY REAL ESTATE PROJECTS!!! AMEN
@@TechIngredients I realize this is a few years old, but really enjoy your stuff, especially when you get that young boy smile ear2ear. I might have missed it - you are lubricating the turbocharger right? As those are designed for automobile use. Have a certain classic Japanese sportscar project in my garage.....yep, Binger turbo, pistons, etc for more faster😆. Pretty sure it'll be louder too. Anyways, keep em coming, thanks.
I was wondering if the compound turbo turbines, will quiet it down, or will a multi-stage generator turbine quiet it down, or, is there a tuned muffler that can be made for it.
@@observingrogue7652 a turbine attached at the end to capture power will make it quieter and the more energy it pulls out of the exhaust the quieter it will be. Without a multistage turbine it will likely just sound like a smaller engine but even with a very efficient design eventually it's just not worth the effort of capturing it. In this case exhaust restrictions to quiet it aren't really an option because they reduce the efficiency upstream. Another turbine is a restriction but its neccessary to extract the power. Many power plants will actually use the last heat to power a steam turbine, extracting power at multiple stages in different ways as the energy lowers. With the dregs of heat left (still enough to burn stuff) you could heat a huge water heater then heat a building in winter and then a bank of sterling engines. As the temperature goes down there will be a point where the energy recovered will equal the amount lost in the system recovering it. That point is FAR beyond the point where it is economical to try to recover any more
I am really curious what your life's path looked like to get you where you are today. It is really scary to think about having kids when I see people like you because I realize how small my circle of knowledge really is. You should compile/share some of the most influential life choices, circumstances, and discoveries - if it's not too personal for public consumption. Either way, thank you for sharing your projects and everything that goes into those with us.
You look so incredibly happy. It's well-deserved, too. That's a ton of work, research, testing, and everything else that went into the build. I hope I can be as inspirational to my children as you are to your son, and all of us.
This experience was more exciting (particularly when you guys turned the engine on) than any of my undergraduate aerospace classes or labs. Truly awesome how much detail you provide. Please keep making videos!
I must say I really do enjoy your projects! Many can build amazing things, but few can explain as well as you do how why they work the way they do with solid science behind you. Thank you,
Man how i wish i could've had someone this AWESOME in my life while growing up. My son & i love ur content. I can't put it into words how much i appreciate going on these journeys with you and while getting my 9 year old interested in the science that goes into what ur doing. Thanks a million 👍👍👍👍
"goosing", and "kludgy" are apparently trope for first order manual error correction in a highly available system process. Love the detailed and concise videos.
I had to chuckle at your little hop while standing in the exhaust. You look like the quintessential kid in a candy shop. I am jealous of your playtoys!
Oh dang! I wish I was paying more attention in the last video in regards to the propane surging issues. I used to work on grain dryers (Vertec) and one of the main heating methods that they used were indeed liquid propane. One of the methods that they used for a more consistent burn was a 'Vaporizor' essentially prior to sending the fuel to get burnt, it would be passed into a hot zone (in front of the burner) wherein the liquid would turn to a vapor, guaranteeing the burn. Would be fun to experiment with wrapping a stainless fuel line around the burner housing you have prior to feeding it to allow the LP to turn.
I am following ALL your engine build videos. I have a frame that I'd like to attach one to but I'm still learning a bit about their workings before I dive in. You've been a great help so far!
These videos are helping me understand practical applications of engineering principles, it's like aerospace version of the 'practical engineering' channel. I do need to brush up on fluid and thermodynamics theory.
Man, those sounds bring back fond memories of when I, as an Air Force missile maintenance technician, used to run the GE-J85 engines on ADM20C Quail missiles in the 1970s.........
Thanks for making these high quality content videos. Sometimes I just don't know what I don't know, and your videos often give me ideas to explore that fill in the blanks! You are appreciated greatly!
I love your fluent physics based explanation. It makes so easy to follow. Wish I would have known all this when we trial runned our turbochargers something like 25 years ago. Got a lot of diesel vapour smoke and noise of course. But nothing as close stable performance as this!
Right at the end of the video with the piece of wood at the exhaust nozzle, made the think of roasting the oak for your whisky video. Maybe you're on to something there. ;-) Great video as always!
With most RC turbines there's no fan infront of the RC centrifugal compressor blades, it's just the motor tied directly to the rotor. When the turbine shuts off, the motor remains on for cooling and it also acts as a flywheel+alternator.
16:05 love that moment! Highly entertaining and educational videos which makes your channel very unique to me. Thank you for sharing your awesome projects!
I noticed that surging issue in the first video, and it reminded me exactly of the same issue with liquid and gas fueled camp stoves; in liquid feed mode at reduced pressures you end up with what seems like pressure resonance creating an inconsistent burn (as you said due to inconsistent vaporization, and presumably resulting backpressure), and in gas feed mode, it runs beautifully. Some stoves get around this by reducing the volume between the valve and the atomizer.
He mentioned that the combustion chamber is small with small turbos which makes it less efficient Isnt it possible to use the large combustion chamber on the small turbo??
Propane fueled recip engines usually have engine coolant heated regulators to maintain stable output pressures and to help vaporization. In future builds that might be worth looking into and/or bleeding off a bit of warm/hot air from somewhere to warm the supply tank. Can't wait to see this coupled to a matching power-take-off turbine. Your grand-finale should be a steam turbine powered by all the waste heat for your very own miniature combined cycle power plant!
Love the videos always! On the topic of propane: a recent project I was on built some pretty incredible pulsejets which originally ran on liquid propane. We also had problems with the liquid (although different than yours: we had problems with actually vaporizing the fuel to burn it. In fact one of the coolest things I've ever seen was a glowing red hot expansion chamber...with frost on the bottom! The temp gradient was insane!). We, like you, moved to vapor propane instead, and have lots of experience working with it as a fuel. If you did want to stay with vapor propane, an option could be to place the propane tank in a bath of warm water, and then use waste heat form the engine to keep the water warm when the tank starts to freeze.
Very true what you are saying about the thrust produced in these homemade turbo engines. I remember one guy who used a turbine from a turbocharger in line with his homemade turbojet to extract the power to power his gocart, but I can't remember where the project went or how it ended. Keep it coming!
I HAD MY HEADPHONES AND MY WIFE SAID "WHAT THE HELL ARE YOU LISTENING TO?" WHAT A MISTAKE THAT QUESTION WAS... I SPENT THE NEXT 30 MINUTES EXPLAINING IT TO HER!! HA! HA! SHE DOESN'T ASK ME ANY MORE QUESTIONS!! : )
I just found this channel last night and I am in love. I'm a mechanical engineer by trade and this content hits me right in the warm, nerdy, center of my being.
Brilliant as per usual. You set a VERY high standard for the content you have in your Vids. I'm looking forward to seeing what you come up with for the liquid fuel. Not many people have done that and to me it's really where these engines go from experimenting to serious and creditable setups. Seems to me that the setup you have now would work just fine although you may need a preheat with gas then change over depending on what you use for liquid fuel. I build waste oil burners based on the same principal of Phase change from a liquid to a gas using retained heat in the combustion chamber. I'd like to be able to work out a flame Holder and do a burner that kept the combustion suspended like you have. The Evaporating back plate and the exit path to bring the flame back on itself is a great idea. Thanks again for the informative and educational vid. You always manage to make learning interesting which is a significant achievement in itself. Btw, The chicken needs to go on a Rotisserie and you need to change the output Nozzle to a 12" diameter to slow the gas speed and stop the chicken from blowing apart when it is done. :0) Maybe put a nozzle in the output pipe so the the basting can be sprayed evenly on in the jet wash. When the chicken was done, with an igniter you could swap the basting for fuel and have an after burner! :0)
Good ideas. The liquid fuel works great right from the start without any pre heat or multiple fuel requirement. As we'll show. Recycled deep fryer oil fuel would be ideal for chicken and beef, I'm not so sure about fish...
I certainly enjoy all your content, so I look forward to seeing more. Been subscribed for a while, through speakers, generators, and all and gained a lot of enjoyable insights. Thank you very much.
It'll be very interesting to see the compound version, higher pressure means more fuel and air fits in a smaller area, effectively making the combustion chamber much larger. I'd still rather see a SPRF style combustion chamber, with concentric layers around the combustion chamber, and a 1000psi water injection system which would create additional exhaust volume and reduce heat stress on the turbine side. Also, keep in mind that, all that noise is caused by turbulence, which reduces efficiency. .
I wasn't referring to Turbo whine, although that is also a reducible noise, I was referring to Combustion Turbulence Noise, which is caused by a variety of factors, and which can be reduced, with a measurable bump in efficiency. I was just giving him another point to research, which creates better overall understanding.
I wasn't just referring to the 'whine' as you call it but the vibration in the air being compressed by the turbo has cavitation like water does when you spin a propeller too fast compounded by the non linear path of the air creating a turbulent flow then the explosive expansion of the heated air on the combustion chamber then the restriction of the jet nozzle. Making it quieter is daunting to say the least and any progress on that path would ultimately be futile as it would be minuscule in volume change anyway
thank you for all your knowledge that you and your son are sharing! I hope you continue to teach until the end of your days- you are the science teacher I never had but always wanted. If this video is proof, its never too late to enjoy doing what you enjoy doing! God Bless you sir
Yes, doing it like that the front is going to get burnt while the back is going to be raw! They may be amazing at science but their cooking needs a lot of work, and a rotisserie. /s
You know, some people become rich and famous just to have a fan like this. It does however remind me of my mother in law when she gets on her hobby horse. Fascinating!!! Thank you both 😎
Seyton, I understand!! If I met you, I would the possibility & a way to do it!! There is no such thing as perfection and everything is possible!! Remember only one certainty in life is death & at so at some point in life, we all run out of time!1 Take it vantage of what you have!! I wish you the best!!!
since finding your channel i have watched almost every single one of them, they are extremely educational and your ability to explain complex principles and problems is astounding. you should do a collaboration video with a channel like smarter every day or Mark Rober or one of your favorite channels, thanks.
Pretty impressive! I would love to see what you do next with both types of jet engine. If you were my neighbour, you would have trouble with keeping me away from your tests! Thanks for the work / fun / effort / time / money that you put into providing these videos. 🙂👍
Hi, First of all, thanks to you for explaining the basics of turbo jet engine nice demonstration..your channel is the first one i am subscribing...keep going..all the best
Wow, sort of reminds me of the startup for the old Hueys ... which I might add were quite noisy and very loud. Something you just had to get used to, the vibration was really something else. If you were going to write a letter home better to wait until later, ha ha ha . I remember one that had an 8 track, although you could barely hear it, they played it anyway. Seems like a hundred years ago now.
On a more serious note, increasing the exhaust mass as a means of increasing engine thrust (and efficiency) is very clearly seen on the increased bypass ratio on turbofans. They started out low, but they're now as high as 11:1 or even more on the GEnx and Trent 1100 engines, which means that only 1/11th of the mass passing through the engine is used for combustion, and the rest is just propelled out the back by the enormous fan.
Main presenter, if you really wanted to use liquid propane, have you considered running your fuel line (metal fuel line obviously) around the flame tube or exhaust in the form of some heat exchanging coils to convert your liquid supply to vapor before being burned? This is what we do in hot air balloon burners. Also, call up some hot air balloon pilots and ask if they have or have a line on some illegal (to fly) propane tanks they want to get rid of. They're 10 gallon propane tanks with liquid and vapor taps. Quite handy.
The source of the tanks is a good suggestion. The heating of the fuel posses some challenges. It needs to be effective and therefore the lines need to be long enough and be immersed in the hot gasses, but not obstruct flow. If the fuel expands too much the flow resistance can choke the fuel flow.
Hello I'm an aircraft engine inspector (internal components) of 4 years and engine assembler (both new an used) at a major manufacturer. Let me know if you have any questions. BTW we run engines with a type of refined kerosene, we push fuel through many fuel nozzles around the combustion chamber, the fuel nozzle have a pattern of holes machined inside of them to mix and swirl and air fuel together. We push fuel through high pressure teflon lines, with stainless steel braid then covered with a 0.125" thick later of RTV silicon. The fuel pressures are hydraulic ranges 1000 to 3000 psi, throttling the fuel is more complex than just a valve if you want to attain high efficiency, you will at least need shaft speed sensors. You should redesign the combustion chamber and turbine support case to allow linear flow.
That's an easy winner of the "best Tech Ingredients opening sequence" award so far.... (I am, it seems, selecting myself as the sole nominating committee and judge of this unfunded award. Hopefully it's not awarded weekly but just once every ten years or so :))
Is there an afterburner planned? :D Surely would worsen the fuel economy further, but it would add to the experience! Perhaps it is better if you concentrate on the next versions. Anyways, thanks for the effort you put into the videos!
it was so nice hearing someone talk about turbine engines and get it right. You missed a minor factor: static pressure thrust from expanded flow. Though fabricating an efficient diffuser for that would be a trick.
As always very interesting. I would make one change to you setup, As you have the room under the bottom shelf, I would alter the brackets holding your instrument gauges, and angle them to 45 degrees so you can see the gauges when standing up. looking forward to the next instalment.
Good to see you stepped up to a big boy! Just happened to complete work on my phase one engine while building up parts for phase 2 (a 7" dual compressor axial design that I'm scratch building) today and wondered if you ever did anything else with your build. Couldn't agree more with your synopsis on the pitfalls of using an automotive turbo for these, but it does take a lot of manufacturing of precision parts out of the equation. On the subject of LP/gaseous fuels, the engine testing groups use a fuel warming system that's rather elaborate to get around the cooling issue, though for us backyard guys, a kiddie pool filled with water and a heating element works equally well based on scale of our supply. I had a reptile heating pad from a fermenting project long ago that I used, as it maintains a good 120* F quiet easily, but a resourceful gent such as yourself could easily rig up something with a bit more grunt. You could also go overboard and build an insulated and heated holding chamber, but the kiddie pool is much more practical. I really liked your approach with the 'injection plate' idea as I came up with something similar for my phase 2 engine, though quite different in deployment as its designed around running hydrogen fuel at a good bit of pressure. Keep at it as I'm looking forward to seeing your compound operation with a free power turbine take shape one day!
Thanks! We've gone on to test the engine with both methanol and isopropyl alcohol. It works at least as well as with the propane, requires no warming or propane to start and works well with the plate diffuser too. Oh, and be careful of parallel turbos. Just like parallel diodes, a small difference in the performance between the two can lead to a runaway seasaaw. Personally, I'd recommend going to series operation and reaping the added benefit of increased effeciency.
@@TechIngredients Ah, very smart with your fuel swap, sir, and thank you for the advice! My larger engine will actually be kind of a hybrid, as an axial arrangement with compound components. I suspect there's a reason the pros don't do this, but for the sake of experimentation and not having to drive 6-7 rows of parasitic compressors, I'm having a go. =) Add: I did have a brief research period of looking at actual compound turbo setups, and you are right on the money with how those things are sized and oriented. In my build up of parts for the first engine I happened to land some large compressor wheels from what I suspect were APU units, which is why I'm going a different route. Who knows, with a bit of work and a massive stroke of luck, it could be revolutionary (probably not though; it'd be tough to outdo the Williams-era engines!) in small jet engine design.
Noticed on the first engine the use of what looks like a spray nozzle like used on an oil burning furnace. You mentioned splatter and uneven burn (nice solution by the way) but as added information, those nozzles come in a wide variety of spray patterns and flow rates. Most are designed to work at 100 psi. Perhaps a different nozzle? Hollow cone vs solid? Various spray angles...many choices!
I was aware of the large range of different designs and tried several variations with almost no change in the performance. This suggested a common and unchanging problem. Using a transparent fuel line it became clear that the irregularities originated in the chaotic vaporization of the liquid propane in the line.
