I'm loving seeing your progress

This is called a "motorjet" and I built one as a teenager about 30 years ago, I used it to successfully fly an RC airplane. Good for you for doing it, but in order for it to work the compressor must be able to develop an appreciable pressure ratio. Your compressor is of the style used in car turbochargers and must run MUCH faster than a 3D printed one can withstand. I made my compressor wheel out of model aircraft plywood and machined grooves in the outside diameter, then wrapped it with carbon fiber to keep it from blowing up at high RPM. I used a brushless DC motor to drive it directly at roughly 50,000 RPM and it produced around 3 PSI pressure IIRC, which was just barely enough for the engine to produce roughly 1 pound of thrust and fly the ~3 lb. RC plane. Fuel consumption was incredibly high, about 1 liter of fuel (diesel fuel/kerosene and gasoline mixed) for one minute of flight. It did work, though. So yes, this CAN work! But, your compressor must be able to develop a few PSI of pressure otherwise you won't have a jet engine--just a blowtorch. About 5 PSI pressure is a good number to work with, restrict the outlet of the compressor by covering it with your hand and see if you can get it to produce a few PSI without blocking all the airflow.

Nothing like the feeling of finding a cool new youtube channel

This is great! You probably already know this but if not, you should consider getting a very high KV brushless motor and driving the comrpessor directly instead of using pulleys and those DC motors. They are much more powerful and efficient, especially at really high RPMS, which are needed for this compressor.

you rarely run into low subscriber count channels that have content this interesting and knowledgeable in simple fun way, love it

As a young man back in the late 80s my buddy and I were always playing with a go-cart or mini bike or whatever. We decided we needed a supercharged go-cart. My buddy made one to fit a 5hp Briggs. Didn't work well. So I took it and made some big changes and it worked. The impeller was a washing machine water pump. Turned it into a manageable shape for the 9in south bend lath were were using. Had a 9-1 over drive with a v belt. Had studs in the engine. Shaves head. Massive ports. I ran it on 25% nitro rc helicopter fuel. It was a screaming beast. Absolutely dangerous as could be. Now with 3d printing. Hard to believe what is possible. We joked about making something from nothing. Never dreamed of stuff like this back then.

Turbocharged jet engine! Integza would be proud!

This quality of video vs subscriber count is grossly underrated. I thought i stumbled on a 500k+ channel lol

~Major Aerospace manufacturers hate this one WEIRD trick to add %30 more to your turbine engine!~

wow randomly found this video, nice bro

Maybe you could add another compression stage? The pressure seems quite low, as even the first jet engines had around a ratio of 2. Either axial (to act as a axial inducer and stabilize the flow before entering the centrifugal stage) or centrifugal, and perhaps a thrust augmentation nozzle like those tested by NACA? Though it is probably the jet engine itself that is the weak link, but given that you are working on a follow-up it probably doesn't matter. You should perhaps look at the Jumo 004B's combustion chamber for some inspiration, those reached 95% efficiency and compared to more modern ones, are easier to find and get your hands on.

This is so cool but im pretty sure with a propeller and those two dc motors you could generate even more thrust

I have no idea how I ended up on this video, but this is an awesome project! Super interesting!

Cool stuff!!!

The bigger the turbo the more that jet going bang

Thumbs up for you having a lathe! All of the hip 3D printing people I know dont have one. They think its some obsolete grandpa tool. They then proceed to show up every week to use my lathe :D

Channel seems underrated; hope it takes off 🤙

Nice, maybe a two stage compressor to get even more airflow and higher pressure? Maybe two first stage inputs feeding into one secondary stage?

Damn that peek-RPM at 30.000.000 (MILLION ?!) 4:32

im amazed the impeller holds up. nice work!

Great video! I would be interested in the files for the turbo if they are available.

Hidden Gem of a channel!

This is so GOOD!

I was trained on the T56A-14 Turbo prop. 4600 SHP output. 20,000 HP input to compressor. Just a FYI perspective.

nice, but i think if you printed fan or an axial compresor with multiplying bldc motor from used hdd its will be a good project, you can adding motor in series flow and make it reverse spin every section

Man this is awesome, any chance of you uploading the STLs or step or....really anything thatll let me print one too to the thingyverse ya got listed? :) Anyhow, subbed :)

This guy is building a drinking jet engine while iterate on various thing, i actually speedrunned this and going to sub instantly, just one thing you need to proceed slowly enough to not stress out TOO MUCH, we want and must see your progress but keep in mind that you need to think to do this at the right pace for yourself!!!!

It looks great!! Are you using PLA or ABS?

well done!

My HVLP spray system has a 3 stage radial blower. They're just high pressure vacuum cleaner motors. Suspect the only way to get much higher outlet pressure with a 3d printed system is to add a stage. It will start to get warm however, so choice of print material would be important. On the combustion side. Are you making use of the propane to bootstrap air flow? By that i mean, heat it in the exhaust to vaporise it and generate a bit of pressure, then use the pressure in a venturi or air amplifier style nozzle to suck air into the combustion chamber. Looks fun. Wish there was enough time for such projects!

I demand the next video NOW great stuff

lovely to see how you will blow up for sure keep up the good work

Keep it up, I love the content. I subscribed

how in the world does this have only 10k views? this is crazy good work, your content is really beautiful just subbed!!! edited my spellings and grammar, lost Neally's heart cuz of edit :(

I am just amazed you can 3D print an impeller and it withstands 20K RPM :O

nice video dude, your different to other engineering creators but in a good way, your stuff looks professional clean and well done. i will recommend your channel to my friends that like this stuff

So much respected me brethren for your ingenuity. What we need now is another concept. Tandem Quad-Copter, normal frame and minus all tha plasticy-plastic. Similar to *Jetson ONE* but quite larger . Eight BLDC motors but in four pairs in co-axial. No main battery. Or perhaps small emergency batteries but only as a redundancy. What I mean in essence is a Gas-Turbine with Rectifier converting the AC into DC. Technology is so far ahead that BLDC motor and The Switch/Transistor cooling is no longer an issue. Look up for *WeberAuto* YT Channel explaining the Tesla Motor cooling. There are so many additions to this concept and its quite possible to be the most fast, maneuverable flying VTOL- machine. I am sharing my ideas because I am not capable to manufacture this beautiful flying machine but I would be soooo happy if someone build it before me!!!! Good Luck, Brethren!!!!!

WOW!

Very fun project I have some ideas that could help you out. It appears your centrifugal is having some compressor surge. Also you might find that adding a variable vane inlet. And also a bleed band on the compressor to help get past the hump of that surge zone. It looks like it’s having a hung start and you may find that having a duplex nozzle will help with that. Like having a fairly raw start fuel circuit and then slowly transition to primary fuel. Usually I start my turbines up around 12% n1 or compressor speed. Iirc around 34% is when we will make the swap from secondary to primary. There are some other things that can help too like maybe a diffuser.

damn when the video ended i was like, this dude is actually doing cool shit, he earned a sub. lmaoo.

How are you getting so many RPM out of 3d printed parts… that’s amazing.

Buy the cheap modified iron with thread on tips for the threaded heat-set inserts. Even with that it’s hard to get them perfect enough to make a long screw even appear straight but it’s still extremely satisfying to watch them go in

Remember, cars have at minimum a compression ratio of like 3-4, and they're already like only 30% efficient. Look up heat engine cycles and you'll see that getting a hugher compression ratio is the single most important thing for you to figure out at this point. One of the issues I think I see here is that your combustion chamber is larger in cross section than the inlet of your turbine, which means that you're actually expanding the gas when it should be squeezed as much as possible. Make a smooth throat, and do combustion in the throat. Make the throat as narrow as you need until you get an acceptable compression ratio. The reason regular turbines are the normal choice is because you get positive feedback, it's even possible to have runaway occur because of this. Whereas the electric motors will falter and peter out as speed increases. You'll also want to have a shell around the combustion chamber, and have flutes in the chamber so that cool air can keep the metal from melting when it's running as hot as it should be

Actual turbos spin around 130,000-150,000+ rpm so yeah…. Gonna need a lot more electric motor to run that thing… I am impressed you got a PLA compressor wheel to 30,000rpm though.

Very cool stuff🙌🙌💯… can you tell me what sensor are you using for measuring pressure and thrust?

over 100 g is not much, but how great that someone create a homemade jet engine, pls make a bigger one, pls

Wow!!! 👏

You may need to adjust the loudness settings on your video to match youtube's standard.

Hey I know it’s a a lot harder for your size application but I’ve gotten small turbos about 1/4 the compressor wheel size of yours with resin printers, very similar numbers with FDM if not better for your use case. Got them up to 1psi at 60-70k rpm. Lot of heat develops at the blades after those numbers in resin prints in my tests. I say mess with scaling percentages in the decimal points and work on getting a tighter tolerance too on the housing

Nice project! I noticed that there was a bit of surging so maybe try messing with the length of the outlet pipe? This should improve your air fuel ratio even further and also provide a means of back pressure for your fan to fight against and thus build more pressure and more thrust

Compound the two! Hope you don’t melt the second impeller though

Danke für das gute Video.👍❤

Is there some way I can download the stl files for the compressor? I want to build it myself so I can run my seventy five cc engine with it.

that's really cool dude, next project I really recommend you to work on a pulse jet engine, those a really cool and easier too.

Consider making the “neck” for the inlet longer and with a bell mouth.

This is awesome u think we can mount one in the back of ny Challenger and it would go faster? 😊

very nice! for the 3d prints that need to be printed together, are there any parameters that you need to set on the slicer? Ive been having trouble getting mine too fit

Could you do a video on how the impeller is designed

You may have felt this video was cursed, but it definitely earned you a new sub here! 🤣

i have a good idea to make more thrust it woud eat more fule but a afterburner

What are you using to measure the pressure at the outlet of the compressor?

have you published the 3d models for this anywhere? I could use a turbine like that for a project I'm working on

Don't know where you live bro but I am pretty sure I heard you swear profusely when you dropped that off the bench and I live in Australia, cool video cheers.

can you release the files i wanna use this as a fan and a turbo for a small engine.

You do want to actually choke the jet engine throat, tho. Won't get good thrust unless you do. But you need like a 1.9:1 pressure ratio for air at room temperature to get choked flow, so 0.7psi ain't gonna cut it. 12psi (above ambient) is probably required. So 17 of those boys combined. (temperature will get to about 165°F from compression if you do that, so need material that can handle that.)

Should definitely put it in a Honda Civic

What software or cad do you use to make stuff like this? I’m just getting into 3d printing but I want a good software to make cool stuff on eventually.

how would you change the compressor so it creates (useful) thrust without the fuel burning chamber?

How much power does the compressor use? And how does it compare to thrust value?

this puts my homemade back yard shenanigans to shame

Neally, here's a similar idea but he uses an aluminum compressor from a turbocharger and it can withstand much higher RPM than a plastic one can, especially a 3D printed one. He's getting over 3 PSI pressure and his engine produces about 900 grams of thrust (about 2 pounds.) Here you go! kzfaq.info/get/bejne/mJmhZZV2p6iaip8.html

I am curious about the Static pressure tester "the boxduino" what components did you use? Id love to build one

We need like 50 youtubers + Michael Reeves to make a gimbaling rocket engine with like 20 pounds of thrust.

Hi, im wanting to get my own 3d printer to make such impellers and usable components as well as foaming filament for plane components. What printer did you use here? Was it a resin or an fdm printer an what model was it?

🔥🔥🔥🔥🔥

One of these days makers will realize resin printers exist and produce accurate and smooth parts. One day...

my question is, is the thrust due to the motor blowing air, or is it actually combustion. gotta test them separately to find out.

Do you think this possible with car turbo ?

Don't worry m8, it'll disassemble itself. 😂

The algorithm is picking you up, review what you did this video and try to replicate but better

what sensor for you use for rpm and pressure? i am curious

Is thera a way i can get these files to this compressor 😊

Why do you have calipers on a spinning shaft?

KZfaq randomly referred me to this video due to the 3D printing hashtag

what is the material for the impeller?

How did you balance your rotating assembly?

This project is incredible! Seeing the capabilities of 3D printing is amazing. If you are looking for metal 3D printed parts, please reach out! We are a startup offering affordable metal 3D printing services!

Run 4 motors and have the ratio for higher rpm

I'm new to this, but an engine that cannot self sustain and that gets it's primary power from electricity is called a motor. In your case, I would venture you say that you have built an electric jet motor.

Running with Diesel will make your engine produce more power

INSTANT SUB!

Share the CAD files for those of us who want to print this?

I wanna see shock diamonds, more boost!

Compression thank vith blodbank valve may help....but can you please put your jet infront of a ram jet to se if you get " mak5" 😅

Hello, why can't the compressor have a unique shaft with the turbine wheel so that you can, after the turbine gets to good RPM, turn off the electric motor and let it run using only the fuel and not the electric motor?

So like what about getting it to 50,000 rpm

can you upload your design for the super charger please

What drive shaft did you use?

Liquid fuel yes!!!

what if you used a jet engine to spool a car turbo and put that turbo on a crown victoria because those things are indestructible