Homemade Axial Jet Engine
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- Опубліковано 1 жов 2013
- Also check out my new blog: jetenginetech.blogspot.se/
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This is a short video showing you my high school science project from the autumn of 2012. It's a pretty simple design based of the most simple jet engines. Unfortunately I've lost most of the photos i took of the interior.
Note that the engine never became totally self sustaining so if you're going to replicate this design you might want to change some of the design features.
Engine builders: Mattis and John.
Photographer: Carl and Jesper.
I apologize for the bad english, I made this video in 10 minutes and did not check the grammar before uploading it. :P
Enjoy!
Here's an update and drawing of this engine: www.youtube.com/watch?v=Cmnib...
Also check out my homemade rocket engine: www.youtube.com/watch?v=xgCnnH... - Наука та технологія
Just the fact that you are using your brains, experimenting, and being productive, instead of sitting on your ass playing video games all day and/or doing drugs, deserves a big thumbs up!
No it does not
Oops. You have been offended! You must like to play video games and do drugs. Sorry to offend you. You missed where I said sitting on your ass playing video games ALL DAY. Unfortunately too many people in the USA have become video game addicts. I know many of them myself. They place such a high importance on video games, that they destroy families, relationships, choose to not do other fun/exciting things, and even turn down sex to play video games. Now that is pathetic. Most people I know that do drugs on a regular basis, are slackers.
electronicsNmore Sounds like you reeeeaaaaally have something against video games and the people who like them. What's really pathetic is that you can't just let people do whatever makes them happy without insulting their lifestyles. I mean, I don't like sports, but I don't go around criticizing people who sit around on the couch every weekend watching "the game" or obsess over fantasy football. Live and let live, you know?
Also, virtually every human being in the world (yourself included) does drugs. Be more specific.
Major assumptions here you boomer.
Some video games take a great deal of thought. Most high paying jobs today and into the future are very similar to video games. I like that the kid tried to make something even though it wasn't any kind of jet. It was a fire and a fan.
Jesus people, it was a "high school" science project. Just where the hell are they suppose to get precision made parts and bearings made of really expensive alloy metals? For a couple of kids using tin cans, home made fan blades, and an air-compressor to simulate the compression cycle I think they deserve an A.
Nicely done guys.
Hearing comments about how this is not a real jet engine - that there's no air compression and that it's not self-sustaining - just makes me laugh. It's a high school project, not GE or Pratt & Whitney research and development. It's a step that the vast majority of high school kids will never make. So what if it isn't self-sustaining? If you saw an airplane that could only stay aloft for a few seconds, you'd probably say it's not a real airplane but guess what... in Kittyhawk, NC, there were 2 men (Orville and Wilbur Wright) who owned a bicycle shop and they would beg to differ. On December 17th, 1903, the Wright Flyer flew for 12 seconds, proving that powered flight was possible. It was nothing compared to the aircraft of today but it was a very important first step. This young man has simply taken that important first step. He had the desire to learn more and he experimented. Don't make fun of someone just because it doesn't fit with your idea of a jet engine. By the way, how do you know that there is no compression? It may not be efficient, but simply shortening the blade length of each compressor stage would achieve compression. I look forward to the day that this young man has access to a CAD program and a machine shop because it will be nice to watch people eat their words. From an aviation enthusiast, Aircraft Mechanic and USAF Avionics Systems Specialist (F-15, F-16 and F-111), I say WELL DONE and keep up the good work!
+Sean Foster I am a mechanical engineering student and I can bet half of my classmate won't be able to make any part of this.
+Sean Foster I TOTALLY understands you my friend. Ask those fuckers to make one and they'll shit brix. I would say this is extremely incredible and the sound it makes is lovely!
Peace.
+Sean Foster i get what you are trying to say but its just fact that if its not self sustaining it is an engine because there is no energy output, i have built micro jets before and axial flow jets are harder to make without a shop as you mentioned most of these i have seen have little more than a fan for a compressor, it is a good try i think he needs to work on his compressor a bit more or switch to a centrifugal compressor
+Sean Foster I think, there is nothing to add... Except that I hope, the guys have a good life insurance... :-))
BTW: I cannot understand why somone can rate this as "don't like" rather than to give no rating at all if he is not interested in such things...
+Sean Foster
I couldn't agree more with your thoughtful and intelligent comment. I used to do crazy stuff like this in high school and it lead me to a very rewarding and successful engineering career.
The short life due to high temperature shows how sucessful this project was, because it was able to generate so much power and heat that the inner engine melted. Good job, i liked it!
If only did he made it heat resistent
It's a fail, it has to be heat resistant like real jet engines.
Well an aluminum can can only do so much
If you want to make it again, you can try adding a water injection system to make it last longer.
He should make the front blower a few cm bigger to blow air all around the turbine
we all love a good backyard jet, nice work indeed
leokimvideo i love you red back spider videoes
LEO! Hi
Thank you. You're totally right, the compression section was the part that made this engine not completely self sustaining. The engine had only a 3-stage compressor and I did not care for stator vanes in the compression area, wich was a mistake. Something else that was missing was a smooth way to guide the air to the next compressor wich meant that the air flow got distroyed.
As a Physics and Chemistry Teacher, I am impressed with the work those lads did. It's just high school so it is good enough..👍✌️
You did really well, son! Very few professionals have built a successful axial flow turbine at this scale. You had only standard materials and no CNC support, so your result is incredible! The fuel actually ignites internally (this is often a problem for axial flow turbines - the fuel tends to blow out the back and ignite like an afterburner only), the turbine accelerates... you've got the makings of a successful turbine! I also do home engineering and I've never come close to anything as impressive as this. Well done!
+Lozzie74 Thank you! I would'nt call it successful as you do, but I think it was a good try. In a few years I might make one that is actually working, who knows! :)
@@mattis_berntsson That was cool. Now throw in a flame holder and some plumbing to bleed air that can be fed back to cool the flame holder and turbines, you got a motor that doesn't kills itself.
You guys will make your way ! Congrats from an old buff (Dr. rer.nat.Volker Klein - project manager in the German space industry).I say this, because I also started in early days with technical experiments (transmitting radio programs from the house into the garden - some 100 ft) by a torch lamp that was connected to the second loundspeaker outlet of our AM tube receiver. In the garden the light of the torch lamp was focussed by a small lens onto the light sensitive side of a Germanium transistor. Its output was strong enough to drive a hig impedance (2 MOhm) headphone to listen to the radio programs in the garden (even at bright daylight)... that was in 1965, when I was 13.So ... go on and never hesitate when problems are occurring; it's just normal and there is always a way to cope with them and to solve the problem.
+worldbestpilot Thank you, it's an honor! There's nothing better than experimenting when you're of that age, it teaches us a lot :)
Ignore the doubters please - what a talented and creative student you are for trying this! Absolutely fantastic efforts and for sure you're going places. Best of luck
I can't believe all the hate this video gets in the comments. SO many know-it-alls. Even if the engine never got self-sustaining it was still a cool experiment for some teenagers to pull off. If I were going to criticize, it would be to say you need better safety precautions. Hot metal parts spinning at high speed do very bad things to skin when they come apart. You need more than goggles; you need a physical shield and a way to operate it without standing right next to it. But this is very cool.
I agree on all points AND IN ADDITION don't align your face with the exhaust of any more of your experimental devices. This kid got lucky he didn't inhale plasma.
C Straley plasma?
corbonzo1 Yes plasma. If this thing self destructs while spinning at exotic speeds it's possible to have a ball of plasma come flying out of it. If it hits your face you could burn it BADLY and you could also inhale it which would cause BAD damage to your lungs, possibly fatal.
interesting! never heard of plasma from a jet engine
C Straley I am sure the plasma will be the least of your problems if that thing explodes while spinning at that ridiculous speed.
At last! Someone who knows the difference between an axial fan and a jet, lol. Nice design, looks like it was fun.
Like others I question whether or not we are seeing a jet turbine or just a noisy blowtorch. I do however applaud the young men in this video for their determination and curiosity.
Science and engineering doesn't come without the occasional setback.
Keep up the good work men!
Great piece of work.
Just to get it balanced at those speeds is impressive.
Ignore the idiots with the stupid comments who could not even fix a puncture on a bicycle. They are the failures - you are a winner.
Worcester Exchange Ok... I am building at the moment an REAL jet engine, that should be able to self sustain. That ins't just a bad propan torch ;)
@Dr. Vappy how? he's building something real. all the people defending this video are snowflakes who are afraid of criticism even though thats what drives progress. I build something like this when I was young, someone called it shit and pointed out how it didn't work. So I built a better one that actually works
@@Jack-hg1hq Criticism, although important, should be accompanied with commendation. They've managed to take quite a big step towards making a jet engine for which they probably did research and development as can be witnessed in the video and that is where everybody starts. Taking the initiative to build something physical and working is what facilitates progress and it is much more difficult than sitting in front of a car with a couple of googled pictures and no real plans or prototypes.
I believe you are much more qualified than them in the specific field, try replicating a self sustaining jet engine with the budget and resources of a high school teenager, I bet you couldn't!! No offence, but it is wise to provide advise when you have the work to back your words. No hard feelings dude, cheers!!
@@maxischerr ich mag kuchen
I wish my big brother was alive to see this. He was always testing the limits of engineering. Great video!
For being HIGH SCHOOL STUDENTS you guys have done VERY well with this. I am sure that with some more research and refining that you could very well get it working. And remember guys they are just HIGH SCHOOL STUDENTS!!! No need to beat them down for failure!! that is how some of the greatest minds have come about!!
This is really cool.
Congrats!
Testes muito bons amigo!!!
Well done guys. Creating the rotors alone and getting them to spin fairly smoothly was incredible really. Kudos!
This is much better than many of the so called "home made jet engines" which were only just an electric motor + fan + fuel. Even though not successful, it was a great attempt at a real jet engine. Well done guys.
BRAVO, folks! I tried myself a similar one, 30 + yeras ago, also made with tin metal, but I never reached testing! congratulations from Romania!
Just a heads up guys. For those of you who think your so cool saying that this thing sucks! I would like to see some of you build a jet engine out of scrap! Not a turbo that is not home made.... Well you should all keep your meaning less comments to your self know cares what you have to say. If you would like to put in a comment make it informational and not informative. It was at least worth a try. If I would say for my self that is a pretty good first timer jet engine!
but that's run off air, and all the fuel dose is burn for cool looks. anyone could do this, but if they were to get it to run of just fuel, then people wouldn't be so offensive.
dispatcher7007
yes, compressor blade design and manufacture is a major factor, and without a well equipped workshop and a lot of experimentation (or experience) you're going to end up like this. Getting this far is quite an achievement for a group of school children with no access to research millions, professional workshops and qualified technicians and test stands. Jack Whittle would have been proud to come up with this as his first attempt.
VERY COOL. You absolutely positively must make a build series on this.
First of all props to you for making this, secondly, PLEASE LEARN HOW TO USE YOUR AND YOU'RE CORRECTLY! Thank you.
easthight You do realize he is Scandinavian? Right? His English is just fine, actually better than some people I have come across that live in the USA. Many people, including myself, have made that same minor error in the past. It is a VERY common mistake. Though you mean well, when you use CAPS it does come across like you are being rude and acting like a "know-it-all".
electronicsNmore No. I'm just annoyed seeing so many people making this mistake and also mixing up their and they're. I dunno their backgrounds so i'm commenting on what I see. I don't care if i come of as a know-it-all or rude but it's just that this is a pet peeve of mine.
That "Pet Peeve" can end up costing you friends, and even cause problems for you in the future. People don't like people that correct them. There is a right way and wrong way of doing things. :-) I would let a person know in a subtle way. Such as, "You're skilled! Great job with the engine".
electronicsNmore Thanks i guess. But once again no, cause when spoken it's usually pretty indistinguishable. Just saying.
flygame94 Thanks for explaning and understanding where I'm coming from. Much appreciated. :) Hahaha yeah, same case I guess. Gets on your nerves doesn't it.
This is awesome! Thank you for your work :)
wait...ClayClaim??!!
I am sorry about your project having broken, it looked so good.I am probably too late to comment xD it looked sick
Good job buddy, best high school science project I've ever seen. Regardless that it relies on the compressed air to sustain power I think its still a solid effort
Great project you are on the right track. It's fun learning about engines through testing of different methods and theories. Well done keep it up!
Everyone needs to calm down about this school students project. Okay, to those of us in the know, this isn't a jet engine/gas turbine. But to these young students, it's a project made from raw materials and fashioned into something that looks and sounds like a gas turbine, even though it doesn't give any thrust. It's a scavenger engine that takes in energy and gives nothing back. A bit like our UK government really, but lets not go there.
So, to these students/kids, it has fire, it has heat, it's loud, it's dangerous and most of all, they made it. It doesn't matter if it won't run on its own. This isn't some school for Sir Frank Whittle Aeronautical Research. It's a high school. Let them bask in glory. Let them have their fun. That is what school is all about. Learning. They know that this won't push a 747 down a runway. Just as they would also know that building a vehicle out of LEGO won't allow them to drive on main roads. The prize here is their excitement and learning. So at least give them a break. When you painted pictures in your infant schools, did you have everyone telling you you'd never be a Monet or Vincent van Gogh? No. You were learning a lesson in creativity. Just as these youngsters are.
Agreed?
Second Unit Aerials 100%!
Yes i agree
Why is the world so fucken negative now?! Leave the dude alone, it was a high school science project for fucks sake! I think its pretty badass even if its not self sustaining
Excellent!! These guys just made possible what I wanted to build in my childhood.. That is the beginning of human progress: experimentation. Hope some day I will do the same but meanwhile I had to go to the job..
That was a lot of effort and a great job!
Excellent experiments and very well done. A great effort.
Bill
I've been fantasizing about making a homemade turbojet for years. I wanna eventually break the speed record for fastest rc plane. I wanna make a UA-cam channel showing their construction and tests. This is my dream :D
+Yawning Gull Sounds like a great dream. Pursue it :)
+Yawning Gull do ittt nothing is impossible. so just do ittttt
+Yawning Gull well stop dreaming and get to work
:)
JUST DO IT!! DONT LET YOUR DREAMS BE DREAMS...JUST DO IT!! NOTHING IS IMPOSSIBLE, JUST DO IT!!!
-Shia lebeouf
+Yawning Gull dude same
good luck
This is pretty cool! You can see the can expand in the last segment. I think adding the large fan blades in the front, like with most jet engines, will allow the device to cool down. Seeing as only 10% of an engine's thrust comes from the heated gases, the addition of a larger, main fan blade would give you the remaining 90% of thrust, provided that you have the right gear ratios.
That looks very interesting! I bet you had fun making it and learned a lot.
You made a nice compressed air spinny thingy with some propane for show, very nice.
Looks like the compressor wasn't doing much, but considering they don't teach you anything about fluid dynamics at that level, I'd call it an excellent effort
My hero Frank would be proud of you guys keep up the experimenting...you msy stumble onto something no one else has..plus its fun....well done chaps...
Excellent job you guys. I built turbine engines of all types at work for 37years so I understand how difficult it is to get one going. Be safe and don't get too close to these while you are testing them.
Future Gas Turbine Mechanic or GSM! Great job guys. The world for GSMs are very rewarding I was a gas turbine mechanic in the Navy. There are many types of gas or steam turbines land, sea and air based. Learn and good luck
Well said James... I'm a retired Navy BT/GSM myself! I hope he doesnt get discouraged by all the negative comments! Buttheads just trolling!
Pretty cool project... stay with it... and ignore the Buttheads!
first the beer can hobo stoves - now campbell's soup can jet engines !
Awesome video. Awesome project. Congrats guys! Wish I had tried this in my science fair project. I launched model rockets for mine and measured the height with different fin designs.
Remarkable and terrific!! That's ingenuity! Hats off to you!!
Why is this clever young man sitting so close and exactly on the axis of a jet engine that is being tested?
It seems that this man is not so clever
for science!
In front is the safest place to be.
Behind=hot exhaust gas
Beside=risk of getting hit by metal fragments if rotor disc bursts from overspeeding.
Thanks for the responce. That is surely new light for me!
Idk why, but for some reason I have to think about UAL232 now^^
Keep it up! If you do not test, how are you supposed to know....
+Skyisnotalimit Exactly!
The level of how stupidly dangerous this was,.... AMAZING!
Love everthing about this, hope you blokes graduated in to the aerospace industry, more folks willing to have a go and experiment are what the world needs.
I'm happy to see young folks willing to experimenting, be careful and I hope you figured out the problem too.
How are the bearings mounted for the bearing for the main shaft...?
Now you know why the ME-262 engines only lasted 12 - 20 hours.
30 hours with no chromium, 300 hours with it.
@@santiagoperez2094 because this had chromium ?
Bloody good effort for a school project, well done
Great Guys.
That's very wonderfull work.
Congratulations to all from Brazil
Reading the remarks made about your home made Can fuel turbine engine.
Great job, Love it. One of the greatest rocket engineers to come out of the USA was the son of a coal miner, even his father for the longest time gave him a lot of grief,
it was his school teacher & mother who supported him in his early beginning years as a youth, Great work kid> by the way, It's but heads like these snarks who will end up eating dirt when your making good,. keep it up, But above all be careful,
This stuff can fly apart, It will get you if you don't keep that in mind.
I'm a retired caterpillar Mechanic, I was messing around with engines & all when just a kid. everyone thought I was a wasting my time; It wasn't.
My early years I used to drag race, I would use
anything I had on hand, I never paid no mind to what it looked like, fast was all I cared about, Before the movie came out with two guys running a big block in a 55 chey,
I had already done it, everyone who was anyone in there mind said I couldn't do it,
Made fun of me, after that I had people rolling in my yard wanting me to work on there cars. crazy isn't it.
When someone asks "why would you want to do that?" I say, why not?
Ashley Cobb ssshhh! u were supposed to keep that a secret
Lol
can you cook my steak in 2.3 seconds? well done please!
Woooooooooah! I loved it my friend! Congratulations! I was thinking about build other kind of engine like the ones used in small aicrafts :D
This is absolutely awesome work guys, really well done indeed. I wish you good luck in building a stable engine and look forward to seeing your progress. Bravo.
An 'Engine' would have produced it's own thrust from the fuel. You're just burning the fuel while spinning it with compressed air.
How do you know if compressed air? How do you know its not a fuel mix being fed in?
An engine would be traveling at speed so that it could sustain thrust
Almost all jets start off compressed air to spin the turbine and speed up the compressor wheel. Once you're over a certain RPM, the compressor will provide enough pressure on its own to keep the fuel burning.
By the looks of it these lads were almost to that point, but the engine had too much play on the bearings to reach the RPM required, instead it came to a screeching halt.
stevecivic2006 Because you can see and hear him spinning it with the compressor. and having to continue spinning it up every so often.
Stoney3K
The J-79, as used in the F-4 Phantom II is the only jet engine I am aware of that uses compressed air to spin the turbine directly. Most jets use a starter motor such as the J-52. And while the startwer motor may be pneumatically driven it is geared to the accessory drive of the engine. On the FA 18 the started motor is mounted to an airframe mounted accessory drive (AMAD) with a drive shaft conecting to the GE F404 engine(s).
This homemade engine was spun with compressed air but accelerated every time the operator gave it a shot of propane.
so was it able to ever self run? looked like you just used compressed air to spin it, which doesnt make it a jet, but makes it a couple of fans you're spinning with some fire between them. If it can't power itself, it sn't an engine.
No they made a nuclear sub fool.
nice spelling... and it's not an engine.
AV8R converting compressed air into a mechanical energy would make it an engine... are you saying air engines or pneumatic engines aren't engines? how moronic. You'd be right to say its not a jet engine, because it has so maintain itself after being started, which it probably might have if the bearing hadn't melted out
thanks for that completely unnecessary comment which pretty much said nothing. But excuse me, I should have said jet engine, so you couldn't point out the fact that by definition, it's an engine. The same way a pinwheel is an engine if I blow air through it. Technically an engine, yes. Keep in mind you're calling a commercial pilot and flight instructor moronic. Why do you have to bring personal insults into this? Especially because I just left the word "jet" out of my last sentence?
AV8R You fly a bus
Great job!
Lots of advice from most of which have never done this before.
Good luck in your studies and congrats on a great project!
this is an awesome science project man. Great work.
God dag! There is a high school (10th grade) part of physics curriculum called thermodynamics. It's taught in almost any country except the US. I am pretty sure it's studied in Sweden. The last half is engines 101 from a thermodynamic perspective (Carnot cycle, eficiency, etc). There are books everywhere (including free ebooks) and they contain both theory and problems. To study just the thermo chapter by yourself (and solve 100-200 problems so the concepts sink in) you need about 4-6 weeks. Then you have the background and you are up to the races. It won't go particularly into jet engine design (that's way more complicated) but it will make you understand why doing the things you do here (with tolerances and materials you are using) has no higher chances of success than trying to build a perpetual motion system. I am pro experimentation and I don't mean to rain on your parade but here the trial and error approach will not take you to your goal of producing a working jet engine. You could put one together though using a car engine turbo (cheap from a junk yard) and that would be challenging enough by itself. You would learn a lot and have a first working jet in a short time. Then you can pursue machining some parts or buying rotary parts from Aliexpress and making the rest yourself. Think about this, the piston engine (in various forms) is a few centuries old while the jet engine is only several decades old. The turbines existed for thousands of years (ancient Greeks, China, etc) and the principles of using turbines to compress a fluid and extract mechanical energy from a fluid were known for centuries. The theory of thermal engines again, was developed more than a centuty ago by hard core mathematicians and physicists who could put most of the MIT aerospace graduates to shame if they could raise up from their tombs today. Yet the first sucessful jets were produced only in the 30's because the technology (materials and precision) was not advanced enough before that time. 100-150 years ago they were not using tin cans cut with scissiors to produce regular piston engines because they knew the engines wouldn't work. You need compression (several athmospheres) to be able to run a piston engine and the same is true for a jet. In a piston engine is sufficient to have strength and precision to do that (you don't need refractory materials since you have cooling and you don;t need very light materials since the speeds of part movements are low). A jet is a 4-stroke engine except that the time separation of the 4 cycles is not necessary since you have spatial separation. Because you do the everything inertially (dynamically slapping the gas molecules to try to force them closer to each other) you need blade speeds close to the mean speed of the molecules in the gas at the working temperature of the gas. This is about the speed of sound in the gas, 300-400m/s, which means 150,000-200,000 rpm for a 3-4 inch diameter rotor!!! A couple of grams misbalance will result in tens of kilograms parasitic forces in the bearing (explosion of your system) and if you don;t see that it means you are spinning way too slow to obtain any meaningful compression in the chamber. One way to tell is installing a small manometer connected with a very skinny but long tube to your combustion chamber (to protect the manometer from heat and also to prevent the volumetric loading of your combustion chamber). Just measure the pressure you get in the chamber during the experiment. If it's below , I don't now, let's say 0.2-0.5 atm, that's not enough to get any meaningful self sustained operation. Also, since your blades are not even close to an ideal aerodynamical shape, you might need much more than that to realistically get any efficiency, hence self-sustained operation. Keep in mind that any of these inertial forces are proportional to the square of the rpm, so if your rpm is 20k that means only 1% pressure of the case in which you have an rpm of 200k. Another thing to think about is simply the strenght of the enclosure (tincan) - one single atmosphere on 10cm long 10 cm diameter cilinder will produce 300kg of total force. Your tin can will simply give in well before that. Same applies for your turbine blades, a 1cm square blade will need to stand at least 1kg perpendicular force without changing shape significantly, and that is at high temperature which is not possible when you use thin metal sheet from a tin can. These are just a few preliminary points mentioned here, I didn't get into gasodynamics or combustion chamber design. That's more complicated but there you can do a lot of productive trial and error work once you get proper compression. Take a Volvo turboi unit for cars and weigh it. It must be at least 10-20kg. These are 10-20 kg's of high tech materials processed with high precision. That turbo will produce a very LOW efficiency jet engine, just a barely working one because the compression pressure is too low. You are trying to do the same wiith 500 grams of tin can material cut with household scissiors. Good luck! I apologize for being too preachy.
Um, looks like it's only "running" on the compressed air.
You do understand a Jet engine is an Air compressor.
Anyway, the air compressor they used (around 1m13s)was basically the "starter motor", blowing the turbine to start it spinning. I looks like the engine was run in CNG, although they never showed the tank.
You are correct. It's been said over and over again by both me and others here in the comment section. The engine was'nt a succesfull project, however it was really funny to play around with.
That is a cool project you guys made. Now you need to attach it to something and make it fly. Good Luck
Great job guys. I'm a retired airline mechanic who enjoyed working on the real ones. I'm impressed.
Thank you!
Just a hunch. A smaller diameter exhaust with provide some back pressure which might sound counter initiative but helps keep the system more fuel rich increasing fuel efficiency (More Oxygen) and making the system stay pressurised at the intake thus a more reliable internal environment.
Absolutely true. Air is just another fluid and fluid always follows the flow of least resistance(one of the laws of physics). The intake should be at least twice as large as the exhaust for compression. And compression is what a jet engine is all about. To test this theory, go outside and turn the water hose on and restrict the hose and keep it that way. It will give much more thrust by being restricted than the wide open hose(every kid should know this). The fuel is there for two reasons. To keep the compressor (action)of the jet engine fans running and to build up pressure for the narrowed exhaust(via expansion of gasses). If you bother to watch an Air Force jet, the only time the exhaust is wide open is during afterburner where the jet then becomes your basic rocket engine.
***** The principle is fairly simple once you understand the 3 - 4 stages a jet engine uses.
***** Air is a gas. Gasses move differently from liquids. With this compressor it's impressive to have the flow they are getting. The tight clearances needed to create any pressure with gas compression is the reason why it's so hard to make from "scrap" material. They are doing an excellent job. But don't expect them to do magic.
Bert Ober "The tight clearances needed to create any pressure with gas compression is the reason why it's so hard to make from "scrap" material"
Yeah I agree without having parts machined its hard to get airflow balanced still it seems like the next step in this experiment.
Pharozos Funny you mention that. Just got a msg on another video(guy making his own jet engine) where a guy makes his own blades. I mention that they are best done by laser and he refers to me being a stupid hillbilly. I think some people create arguments on UA-cam simply because they are bored with their lives and lonely.
This is pretty cool! Got any photos of construction? And did you ever build another one?
SteamboatEd Haas Thanks! Unfortunately I lost most of the photos of construction. I have plans on building a new one, perhaps this summer...
flygame94 This is a really nice project. If you don't know about it already, post step-by-step instructions on www.instructables.com
flygame94
Can you mount it on a small frame and get it airborne?
+Watch Ryder It would burn out before getting off the ground but it is possible with modifications.
I think this is fantastic, yes it had faults and may have not fully worked but they gave it a go. I hope they got full marks at school with their project and continued with it after. So many young people today would be happy spending their time wasting it away. Shame on anyone who disliked this video.
Great job using simple technology.
Well done guys. great achievement. Tin cans never were so advanced. Titanium next time huh? Your critics here don't get that to do that with mere tin cans is some achievement and it was bound to melt given the heat that jets operate at. I suspect the critics never get off their fat As and just like pulling the wings off flies.
totally agree with you of course here you can see the limitation but still pretty cool :P
I think turbofan design
Cool.
It also totally sounds like a real jet engine. Good job my dude
Keep following your dreams kiddo! You should be proud of yourself.
Still need compressed air to get its spin, without it just seems like a fancy torch. However, nice experiment. It probably not producing enaugh compression to get its own spin.
This is awesome! How old are you? Because I am 14 and am planning to build a jet engine like this for my engineering project.
lol im doing it in elementary
How are you now LOL
Your 19 now...
Im 16 but hope to do this one day also, as in become an aircraft mechanic (possibly)
this is excellent, i am just amazed at your ingenuity and resourcefulness...simply awesome! yes please do provide the video on how you make it!
Awesome.What you guys are doing is so much better than hanging around gettin bored & lookin to party. You should be proud,, I am
its not self sustaining
We know
ignition first! BEFORE fuel!!!!
If you learned something about how jet engines work and how they are made (and how they don't work and how they are NOT made!) then your experiment was a success. It looks like you guys had a good time. Hopefully you got a good grade on your school project.
I'm proud as hell!!!!! I'm smiling hard. I really hop you guys make it!!!
A jet engine with cans and bolts ... You are very optimistic guys.
It worked well enough to melt the metal holding the bearings in place.
theyve got a bright future ahead of them
Ricky Cooke That is absolutely what I wanted to say as well Ricky. Word by word.
Only one thing to say: Startup approved, call Apron 121.75 for push.
Looks realy realy good for a High school project.
How many hours u need to build this? Its pretty cool :D
+Ghost Haha, thank you! It took a few weeks of gathering materials and assembling them together etc. I worked on it in my free time when I had the inspiration. It did'nt start out as a high school project. In the beginning it was only a hobby, but then I brought it to school and asked if I could continue working on it when it was time for the class to start their science projects.
Mathis Bertson Is the jet engine of the plane powered by an electric motor too?
This is impressive as hell! Nicely done!
Excellent experiment. Good luck with it
I guess that's why they make jet engine parts out of titanium
You built it, so I guess you had an idea of the potential risks, but I'd always leave a wider safety margin: I would not stay that close, and even less on the longitudinal axis.
+flightJazzCinema Yeah, I thought about it. But I was mainly just excited to try it. I think I was definitely on the safest of all sides.
Very good job. amazing results.
Good job on your jet engine, with your dedication you, (or jets) will go places!
Better use of time than playing games !
This is one boomer ass comment
Wait, they're pumping in compressed air through it and then igniting the jet fuel by having a blow-torch at the end? Doesn't seem right..
Johnhamond Ohh. right! Gotcha!
also you need compressed air to start the spool up.Just like your airliners do today.they start an apu first which then provides compressed air to each engine in turn then add fuel and ignite.
Stuart Galsworthy Yeah, I recently did a simple paper on jet engines and found that my initial statement/question was induced by absolute ignorance. You're absolutely right and I was absolutely wrong!!!
My God, they've invented the space heater.
Very impressed with your project.
Cool piece of kit, well done
from what I can see it did not operate under it's own power.....did not accelerate and there was no thrust control.....therefore this was not a jet engine at all just some tin cans with blades at the front and rear driven by compressed air and some fuel for show only
+weofnjieofing He's probably in high school. I don't think we should be expecting a full, mountable jet engine to be used on commercial jets here.
+Matthew M but at the end of the day its little more than a fan with fire coming out the back
+weofnjieofing Do you honestly expect a high school kid to be able to build a fully functional jet engine by himself?
STEVE Taylor but theres is no compression its a good arts and crafts project but there isnt much of an engine, what it is, is a fan with fire
+Shanee Bahera
Yeah, people say "what do you expect of a high school kid"
I say, "What do I expect of a rudimentary jet engine", even if it's the most bare fundamental of a jet engine. THIS IS NOT that. This video has failed my expectation.
high school project? in US the high schools are giving very good edcucation then.
Except this movie is from Sweden :)
randomnickify
Made my day :D
Oh and btw, students go to america to get their high school grades because it is easier.
SirFlausch That may be true, but still 47 of 50 of the best Universities (rated by Shanghai intellectuals) are in the US. Why would you even argue about it though, anyway? Does it matter? Are you nationalistic? LOL "My plot of land is better than yours" is what holds back science, not America, as anti-Americans would want you to think.
maxracer176 We were talkibng about high schools not universities ;)
The engine has a string that even the engine itself has not flew away. Bravo.
Very impressive! Thanks for sharing it with us.
Or just buy a referencedesign R9 290/x
LOL
+nikitab00mb___ or just buy R2D2 it will do it for you without a sweat just oil.
That heap of junk wouldn't even pull the skin off a rice-pudding!
So you're saying you've built better in your backyard with fewer supplies?
That's some nice work. I think it'd took ahold on that last try had it been made of more heat tolerant stuff. Good to see some younger guys with some ambition out there.
I know it was 4yr ago but if you were to rebuild it I would have a low air bypass on the engine to give it more thrust and help keep the bearings cooler. And another rear turbine to make it self sufficient. Also I am designing my own engine for model airplane so would like to thank you for the inspiration.
Nice job at the project. Keep up the good work no matter what anyone says.