Homemade jet engine with AFTERBURNER, Turbine mit NACHBRENNER, DIY gas turbine

Hallo,
einige Tests von meinem Eigenbautriebwerk.
Länge: 45 cm ohne Nachbrenner
90 cm mit Nachbrenner
Gewicht: 10,2 Kg ohne Nachbrenner
16,2 Kg mit Nachbrenner
Durchmesser: 23 cm
Schub: 57Kg

[@Praendy]

Hi all, Thank you for watching😊 For all who want to see the variable nozzle I made, some time ago, klick on the link. In the middle of the video, you can see my variable nozzle working. I have to improve the actuation system. Sometimes it got stuck, due to heat deformation. Next test will be with improved nozzle and an ignition system for the afterburner.💪 Andy

[@Praendy]

kzbin.info/www/bejne/gX7JZI1nlLaJfJIfeature=shared

[@peterbuxton8176]

Absolutely incredible project, the fact that you made this in your own shop is mind blowing. Congratulations Sir, bravo 👏

[@MarkShinnick]

Hello Andy, Would you like to see your designs flight demonstrated at Mojave at no costs to you?

[@792slayer]

This is impressive. I'd love to build a light jet with a pair of these.

[@MarthrTshibwabwa]

Thanks you

[@stefanfl1200]

can you imagine taking a walk outside and randomly seeing a guy testing out a homemade jet engine in a field??

[@maxdavies9958]

Hahaha that's what i was thinking, you just hear this noise and lookover and see this going on

[@Driftwood120]

Every Day.

[@martinz5677]

Ist doch ganz normal 😂

[@sergejstankovic2388]

Only in Germany !

[@charlielawhon4772]

I use to do it in a 200-500K housing development back in the early mid 2000's🤣 all but 3 residents were terrified of me. One time a woman in her late 20's was drug up in my driveway by her great dane. My ignition was $#it, the combustion chamber was purged of o2 by propane and I was committed to strike it and hit the start air. I swear that woman looked like a cartoon flying behind her dog, it was a bit more spl than a 12ga shotgun. I felt bad but the stage was set and would have been worse had I tried to stall because the flame was lit at the exhaust and would imminently have drug the air inside and been much more violent🤷

[@pheargoth]

I don't speak German at all so I have no idea what you're saying but the machining and fabrication looks absolutely amazing. Well done.

[@mindrelic]

haha same, I usually wouldnt watch a video i cant understand but i stayed for the whole time on this one

[@anonhollmuller4032]

No much told ;) Only some measured readings and a little about machining tollerances. Sorry but my english is no better than your german. If you want a special timestamp i will translate it for you:)

[@Praendy]

Hi, I will add subtitles soon. Did not think you want to know what I am talking🤣 Andy

[@anonhollmuller4032]

@@Praendy why it shold Not be of interrest for me ? Because the "afterburner " is nearly ineffektive? I have no problem with the truth. You are welcome :)

[@Praendy]

Hi, I managed to add the english subtitles ;-)

[@TonyWeirPD]

This guy has a LOT of confidence in his engineering. Wandering about within a few feet of something that might explode and throw out white-hot pieces of metal would give a health-and-safety inspector an instant heart attack. Just insane that this thing works as well as it does without melting. I have absolutely no doubt that he will have a fleet of supersonic aircraft operating within a couple of years.

[@lutomson3496]

and that fuel so close also ready for an explosion for sure

[@NineSun001]

Well he is German.

[@iplaygames8090]

the darwinian aproach, if i get myself killed its my own damm fault

[@Njazmo]

If you know how jet engines, and health/safety inspectors work, there's no problem. If it's a hobby, it's not work related, no inspectors needed. If it goes around and wants to go to pieces, then we have to think the forces. It's much more dangerous to be on the side of that engine, instead of back/forth. If you're worrying about melting, well, it didn't. Because of materials.

[@trumanhw]

@@lutomson3496 That's actually not a risk. It's the blades in the disk spinning at 40k - 200k rpm that are experiencing 50G - 100G that would be sent through the housing at ballistic speeds were anything to be ingested along with the 100 cubic meters per second that caused a catastrophic 'disassembly' ...

[@S0M3-R4ND0M-GUY]

that one unemployed friend at a random tuesday morning:

[@mtmadigan82]

There was a greatone this guy built "being generous" that he powered in his front yard, with his moms minivan battery. Of course everything caught on fire. Guys well out of high school, laments how pissed him mom and the hoa are going to be.....again😂

[@abel4776]

Unemployment = freedom and creativity.

[@vasishthdave3137]

Engineers are synonym of that unemployed friend

[@babyboijeremy]

I don't know what it is about the german education system, but they always produce the best engineers.

[@johnbevelagua]

Its not only schools, its about how they are raised, to respect rules and every detail - so quite some basics in engineering.

[@Isostopic]

I have never seen a homemade after-burning jet engine that big make a perfect flame at the end. You have some incredible skills. Really cool!

[@EMIRFPV]

Best hommade jet engine videos !

[@Praendy]

Wow, thanks!

[@OldManTenno]

American aerospace guy here. All I have to say is, wunderbar. Can’t wait to see it in an aircraft.

[@uzifouryoutwosay]

When you let off the throttle after you got the nozzle glowing and you saw the engine relax in its’ stand, I laughed out loud. This is awesome. Very cool as usual. -Jared von Die USA

[@herrakaarme]

That's an impressive project! Afterburner pushes the steel to the limit. Beautiful glow so quickly. Seems like Weber is not only good for a grill, but for a jet engine as well.

[@kimfucku8074]

For very fast grilling 😅😅😅

[@andydelle4509]

Impressive! You are a true engineer. You obviously understand the need for cooling the combustion chamber and managing the flame shape. Too many hacks in this hobby think a junked turbo charger with a leaf blower forcing it is a jet engine. No, a true jest engine is self sustaining - like yours. German engineering at it's finest!

[@tonycook1624]

Vorsprung durch Technik

[@caposey]

imagine waking up in the middle of the night and hearing this from your neighbor’s backyard and seeing a bright orange glow

[@almighurt3347]

Dieser Mann ist morgens aufgestanden und hat sich dazu entschieden ein technisches Meisterwerk zu erschaffen. Du hast meinen größten Respekt!

[@medved3027]

There's also a Russian dude here on youtube who has been making and restoring jet engines in his garage for years, with considerable success. He's making a carbon fiber race car in his garage at the moment, sadly not jet powered. And then there's also a fairly recent video, also from a Russian maker, of a hybrid detonation/jet engine. That dude apparently does not have access to advanced machining equipment, nor pre-made helicopter parts, so he _cast and balanced his own compressor impeller_ , and made his own turbine wheel. Reminds me of some of my own projects from like 20 years ago which were completed through pure stubbornness and perseverance. I wouldn't even attempt them now, even though now I have access to almost every conceivable piece of equipment. Which is to say, keep doing what you're doing and do not stop, under any circumstances. This is really well made, and it's a precious experience that, even if the project goes nowhere, you will cherish for the rest of your life more than any "island vacation" or whatever.

[@mansamusa7048]

You mind saying posting the Russian guy channel or name? Would like to see and learn more

[@Praendy]

Hi, The guy from Russia is Igor Negoda. His channel has the same name😊 Andy

[@C-M-E]

Outstanding progress, Andy! You're just shy of the theoretical upper limit on thrust for that size compressor, and for a single stage, that's remarkable! If freight wasn't so high, I've got a few 170mm compressor wheels around here somewhere that would really move some air in that setup. 😁 I recently picked up 17 rolls of aerospace stainless that needs attention this spring. Didn't need nearly that much, but the price was almost the same for 3 rolls as the whole lot. It was surplus to them, and they were going to scrap it otherwise. Noooo!

[@PiDsPagePrototypes]

Sounds like you're looking after the environment, reusing those rolls so they didn't go to waste. 😊

[@Praendy]

Hi, Thank you😃 170mm is a bit too much and hard to find a turbine wheel. Racketmotorman John from Australia has a 170mm compressor wheel running. He uses a Mitshbishi TF or TD 13 rotor. Andy

[@Mediamarked]

@@Praendy Weird question, but would a smaller turbine wheel cause problems? As with the reduction in exhaust comes more compression, maybe more speed of the turbine wheel = too much RPM?

[@C-M-E]

@@Mediamarked Turbojets from much, much smaller compressor wheels have been successfully run, both on the hobby level and commercial markets for various uses. My first little runt was using a 70mm donor compressor. The things that you need to watch out for are more or less universal to all turbojets, which is limiting your exhaust gas temperature (EGT N1 for a single scroll), which will by nature limit your max rpm when all is operating at max efficiency. I've seen these built with really small 40mm units that wind up to 230,000 RPM, but at those speeds, running specialized ceramic bearings are an absolute must.

[@Mediamarked]

@@C-M-E Yes, but will the size difference between compressor and turbine wheel cause problems. That's what I meant to ask, if a 170mm compressor could be coupled to a 120mm turbine wheel for example, but would it cause more compression and rpm due to the reduced exhaust diameter? Most hobby jets have relatively comparable sized turbine wheels and compressors, so I guess a bigger compressor would not be more effective..

[@jasonfraley1306]

Thing is a piece of fine machinery and art. Now let’s see it in an RC airframe

[@NineSun001]

RC? Buil a UL-Plane and super charge it!

[@klausbeck3042]

Hinten auf ein stabiles Fahrrad , Räder gewuchtet , Motorradklamotten an und los geht's . Alter, einen Versuch wär es mal wert . Geniales Stück Arbeit hast da geleistet . Der Nachbrenner macht auch eine sehr gute Figur und nix ist da groß am Rauchen , einfach Klasse 👍👍👍

[@helipilotuh1]

That thrust is approximately 126 in freedom units. Amazing job.

[@weemackee]

Probably even more because the scale's being pulled 20 degrees off the axis of thrust.

[@manitoba-op4jx]

it only weighs 40ish lbs, too. here in the states you could build an ultralight around that thing

[@Tld0026]

I’m guessing you have some serious engineering skills. I’ve never seen a afterburner operate so flawlessly on a small jet engine.

[@Micharus]

It looks like it *might* be stable with the afterburner at 50 kg thrust, but that is just a guess. Very impressive for a DIY jet engine.

[@speedingSloth]

Wieder einmal sehr beeindruckend. Wirklich schade das Ding nie in einem Modell zu sehen. 😮

[@PiDsPagePrototypes]

Does anyone make a model that could handle the thrust kicking in? Maybe Yves Rossi and the Jetman suit?

[@wolfganghuhn7747]

Wenn ich davon 2 hätte würde ich sie hier in den USA in eine varieze einbauen und fliegen

[@ndmcomputing]

Meisterstück. Danke fürs Hochladen 👍

[@johannesbergstein7706]

Der Anblick des Feuerstrahls und der Sound: einfach infernalisch (gut)! Gruß auch aus der Region....

[@omgpotatos9226]

57kg equates to 126 pounds of thrust. Meaning if you weigh 125, you’d start floating up if you pointed the engine straight down. Truly impressive

[@DethWshBkr]

I was actually wondering if that was accurate. The gauge is angled upward, but the sled is moving say 30* offset of that? I was wondering if there was some off-axis loss in the measurement, and it was actually a bit higher than his gauge shows.

[@rawgumball9380]

Sieht absolut krass auf, vor allem der Nachbrenner. Mit 57kg Schub, also 570N, könnte man wahrscheinlich schon ein echtes Flugzeug antreiben, echt krass

[@shanakaliyanage6875]

Good to see you working on this back again!

[@mareshmaresh9079]

Wow that engine works great!even the after burner increases thrust.Great job!👍

[@wadewilson524]

You, sir are a steely eyed missile man! Spectacularly impressive. Also, that you were standing so close to your creation at times shows you have huge clanging brass balls! Standing ovation!

[@99kitfox]

So awesome. The workmanship involved in something like this is extreme and apparent.

[@Miata822]

Thanks for sharing another wonderful video. Very impressive to get an afterburner working that reliably.

[@JViello]

Exactly! I don't think most people realize just how hard this is to do.

[@Curent-Value]

Bravo, bravo, bravo! Ich applaudiere Ihnen beim Aufstehen, es ist Pracht!

[@centurion5915]

Amazing ! He has absolute confidence: the afterburner, the gasoline cans... ...and the car, all that right next to it 😂

[@Njazmo]

Jet engines don't run on gasoline.

[@paradoxx_4221]

@@Njazmo jet fuel is just more refined gasoline, its all oil products

[@JViello]

@@paradoxx_4221 Uh, no it's not. Not even close. It's oil. Refined, clear oil. K1, J1 etc. Diesel and home heating oil is K2, J2. Gasoline is a whoooole other beast with benzine and all kinds of other crap added. Gasoline has a much lower ignition point. Actually it's not even that simple, and I don't feel like doing a white paper on a Sat morning. Search it up.

[@ericchild8845]

Now I am going to have to make one for my RC jet, too. Thanks for setting the bar so low for average Joe’s like myself… just kidding. That was freaking cool. I think I have jet turbine envy.

[@geronimo5537]

Nothing short of impressive. Looks like the only issue is the heat absorbing into the metal. Though it does cool very rapidly.

[@JViello]

It's very well designed. After burners are not designed to run infinity. They are for short bursts of extra power, so it's doing exactly what it's supposed to. Afterburner is the only way the Russian MIGs could even keep the SR71 Blackbird in sight for a short period. (Mach 3.2 my butt!) In doing so the Russians generally destroyed the aircraft in the process or at least severely damaged it.

[@Mxyme]

Always so good to watch, thank you, bravo ! ⭐️

[@jayc2469]

vorsprung durch technik! Amazing!

[@ThUnDaHuNtA_Australia]

you are a seriously good engineer, what an absolutely drop dead gorgeous piece of equipment and its not just all show and blow, those thrust specs are amazing.

[@user-cd9xl7nh5z]

Wahnsinn , wie viel Schub erzeugt wird, im Vergleich der Größe. Tolles Video

[@UnitSe7en]

It runs so smooth and ignites so easy. Beautiful. Das gut!

[@michaelripley4528]

I once made a jet engine with a motor from a vaccumcleaner !!! IT WORKED💯 For 5 seconds🤣🤣🤣 Sometimes the build is better than the run!🫣 Love that YOU made💪🏻😎👍🏻

[@AppliedCryogenics]

The design looks so clean and precise. Fantastic work!

[@koenjanssen81]

Just awesome!!!!! It looks so cool when the afterburner is ignited.

[@chrisreed3929]

Incredible engineering. Looks great fun too, watching the trees bend with the jet wash! Then there is that sound and the smell of jet fuel.

[@dacosta2104]

I am so happy youtube suggested me this. Amazing work!

[@michaelrempel6450]

This is the coolest thing ever. Ive been waiting so long for someone to build an afterburning rc jet engine. Now we need to get that sucker in an F16

[@davidmertes6308]

Wow, richtig cooles Projekt. Mach bitte weiter so, dass ist echt beeindruckend.

[@krammehl]

57kg Schub! Junge!! Glückwunsch und gute Arbeit!

[@justincase5272]

Very nice! You've accomplished some significant feats of enginering!

[@spectator5144]

das geilste was ich seit langem gesehen habe

[@WillDetlor-fz1hx]

I've been waiting what seemed like forever for more content from your channel. Awesome as always!

[@danny34867]

Damn!!! That’s some serious thrust for a home made engine.

[@charlottegrieff662]

Bravo. This is the best example of a designed and fabricated at home GT I have ever seen. It's making real usable power, and then you added your reheat. Again, all the other's I've seen are failures in comparison to what you have built. I congratulate you on your perserverence, skill, and dedication to your hobby. If a little is good, then more must be better!

[@blowduke]

That one of the best homemade jets ever well done sir

[@Bren.nto6971]

Strong thrust 👍. You could replace water cooling with shrouded ducted fan, the heat will taken away with cool air, basically that's how turbofan works 👍

[@judebowers]

Sehr beeindruckend!

[@drpwnage23]

This is so cool. Best home made jet engine video I have seen. Magnificent work, that air inlet is beautiful

[@evangelicalsnever-lie9792]

A work of art and a fine engine. These are honorable skills

[@NetzKanal]

Beeindruckend! Super Arbeit!

[@France_off]

That's a real clean Homemade turbine !!!

[@tommywicker1432]

This is so badass !!!!!! Been thinking of putting one in a street car for racing purposes

[@MaxSupercars]

Schaut und funktioniert super! Tolle Arbeit! 😉

[@haphap1000]

This video is the cure for E.D. . Dam it's awesome

[@benderslife]

The thrust upon afterburners kicking in is mind blowing

[@davidca96]

SO cool, congrats on the build!

[@michaelripley4528]

Nachbrenner😁 I speak german! And wite!! Understand fluid👍🏻 Sound is Wunderbar with a speaker!!!!!!

[@derekturner3272]

Amazing work! A sight to behold!

[@LabiaLicker]

Very impressive. You know I realized watching this that having seen a number of homemade jet engines over the years. It would be awesome to see an open source turbine project emerge. Where instead of everyone having to spend years duplicating work, there could instead be a collaborative process to DIY'ing and then optimizing a single turbine design. Food for thought I guess....

[@Technicallyaddicted]

2:1 thrust/weight ratio is excellent for a homemade jet engine. The off the shelf ones have around 10:1 but they are made in multimillion dollar factories. This was built on a lathe and drill press and you can get everything you need to make one 2nd hand for less than $10,000. Getting the mixture just right takes impressive precision and math skills. 45kg of thrust off a homemade jet is seriously impressive.

[@deominedash]

The afterburner looks fantastic

[@Tensho_C]

Krass... Fantastic work

[@basoncivicsi]

That is very impressive sir. Keep up the great work. Thank you for sharing!

[@MadZaxx]

You sir, are the either the bravest smart person or the smartest brave person ever!

[@evil17]

Really impressive jet mate.

[@konsul2006]

I don't understand how anyone would want to stand that close to a diy, experimantal jet engine! So scary to watch :)

[@Luton-Mick]

This guy needs to be scouted by Skunk Works. Imagine what he could create with their budget and resources at his disposal!

[@timothycivis8757]

I agree this is very well done. Thanks for sharing.

[@TomM-jh8lx]

Great work! Looking forward to where this project goes next. Doing some very rough math here, but with dry thrust at 45kg and 1.8 l/min of euro diesel, I get a specific fuel consumption of 56.6 g/kN.s, inline with a mid-60's turbojet in afterburner:) If it was in a RC plane doing 360 kph, then fuel efficiency would be 3.9%!

[@PiDsPagePrototypes]

The mid-60's jet would not have been flying on Diesel either,...

[@matekochkoch]

@@PiDsPagePrototypes Diesel and Jet fuel are rather close in their properties. Jet fuel has a lower freezing point but also a slighthly lower energy density. For normal household turbine engines this differences nearly doesnt't matter.

[@PiDsPagePrototypes]

@@matekochkoch Check out the test video with a comparison of Jet-A, Diesel, BioDiesel, and HydroDiesel, through a model jet engine, the results are not even close, with Jet-A burning hotter, turning more RPM and making more thrust - 65lbs vs 45lbs for regular Diesel. They might be close in BTU ratings, but they are not close in thier output. Jet-A is a highly refined and pure form of Kerosene.

[@richardchen8511]

Amazing, you are a great engineer ! 😳

[@danielizquierdo8015]

The afterburner is beatiful. Well done

[@cabooey2905]

the afterburner turning on was the most insane thing ever

[@PN_48]

Excellent. Love your work👍

[@eurodavide1964]

Very very fantastic professional people.....and engine. Many congratulations.

[@florianschadt2760]

Because of this guys hobby those damn Wind Turbines are turning in the background.

[@1allan2]

Nice engine, beautiful machining too

[@RemyRAD]

I am duly impressed. I do not know anybody. That makes, homemade jet engines for a hobby. That's one hell of a hobby. Holy moly! That Afterburner, just Incredible! And you caught it both times before it melted. Bravo! Way to go! That would've been an expensive and frustrating failure had it melted. And was truly impressive. I was also wondering why. You would want to start a forest fire in your backyard? I thought with that Afterburner. You wouldn't have to mow the grass anymore. It seems to have worked. Now that's the way to keep your lawn, neat and trimmed. Just push your jet engine with afterburner on around the yard. And you're done. How cool is a hot afterburner than that? Where are you going to fly it? Fly you to the moon? Something about silver stars? It looks like you are going places. Even when just, sitting still. Impressive indeed! RemyRAD

[@Sky-Surver]

Gratuliere zu diesem Meisterwerk!!!!

[@alexoftheway8169]

Respect sir, what brilliant engineering and craftsmanship.

[@BadToelz23]

Hallo Andy, Absolut klasse gebaut Der Nachbrenner sowieso. Ich wünsche sehr du "fändest " einen " Hobbyflugzeug- Bauer" , der dir für kleines Geld ( wenn das überhaupt möglich ist ) die passende Flugzeugzelle mit Tragwerk dazu konstruiert und baut. Dann muss irgendwann noch die Zulassung nach " Luftverkehrs-Zulassungs- Ordnung " erfolgen und du hättest deinen " homemade" Privat- jet.... 😂

[@Praendy]

Hi, Ha, wenn das Mal alles so einfach wäre😊 Ich bau gerade das alles eine Nummer kleiner und dann kann ich das in ein "normales Nachbrennermodell" mit max. 25 Kg Abfluggewicht einbauen. Danke dir😊 Mfg Andy

[@xl447]

I built the Schreckling FD3 64 turbine back in the 90's as a college project. This one is a brute.

[@MrPants1970]

That after burner sound reminds me of the 1960s Bat Mobile such a cool sound

[@johniccia6175]

That's amazing, the amount of thrust produce with the afterburner

[@kingfishstacy]

Great job! Thats was a dream of mine to build one from scratch. 👌

[@DeNilsPipe]

Besonders gut finde ich den feuerfesten Untergrund 😂😉 Unfassbar krass die Maschine!

[@oliverburk5218]

immer wieder schön deine Projekte zu bestaunen. Deine Azubis werden viel von dir lernen. Zeig denen doch mal was mit Feststoff😁

[@lutzmeier5734]

Was für ein Kraftpaket!

[@jagaszepielak2601]

Great job super turbine 😊

[@Roboseal2]

I need this on my bike asap! Also please add a loud volume warning! that thing is a beast!

[@StraightSh00t3r]

You need to make an articulating afterburner lined with NoMex or thin blocks from a forge. Make the afterburner articulating that way you can squeeze the exit orifice down for more thrust or open it for less thrust. Then you’ll have a real Jet engine. Awesome job, my friend.

[@Real_Claudy_Focan]

57kg with some angle ! Got to divide that by the Cos (around 30°) and you got something closer to 65kg !! But that blue-ish flame is insane !

[@tkmad7470]

Amazing! Thanks for sharing!