Handmade Jet Engine, update of todays video 34 Kg THRUST

[@johnded3874]

A jet engine for a self-launching glider (‘BonusJet’ -- PBS TJ-100 turbine engine) produces 240 pounds of thrust (108 Kg) and weighs 42 pounds (19 Kg). So, the weight to thrust ratio for this turbine engine is .175 (every .175 pound/kilogram of engine produces 1 pound/kilogram thrust) Praendy's jet engine produces 34 Kg thrust and weighs 12 Kg, so it's weight to thrust ratio is .353 .353/.175 is almost exactly 2. So, if I'm right, Praedny's jet engine has - for each pound of engine weight - as much as half the thrust as a commercial engine! Very impressive!

[@tubekrake]

Now I wonder why is it so hard to copy the design of the professional engines and get the same Efficiency.

[@creativityworld6781]

PBS TJ-100 generates 292 lpf (132kg ) of thrust

[@johnded3874]

@@creativityworld6781 I think you are right, my bad.

[@jonginder5494]

That’s amazing. I can’t believe it turns the big propeller in the background 🤣🤣🤣

[@Praendy]

Hi Jon, the engine is responsible for producing electrical power if there is no wind in Germany.😉 Andy

[@amnesie6615]

Woah ist das beeindruckend! Wahnsinn!! Aber wo ich ja Angst hätte ist, wenn sich mal irgend ein Teil löst im Betrieb durch Materialermüdung... Das fliegt weit und durchbohrt sicher einiges...

[@Praendy]

Moin, da geb ich dir Recht. Das ist nicht ohne😉 Der Läufer ist für dauerhafte max 70 000 ausgelegt. Da sollte ich mich mit 63 000 im "sicheren" Bereich befinden. Aber man kann ja nie wissen! Andy

[@TheJonnyvolts]

You and Ramy RC, collaboration, make it happen lads!

[@pantherosgaming1995]

That's actually an impressive jet engine mein freund! It looks good and as far as one person commented from math, performs pretty dang well! I hope you're able to tweak it and make it work better for you! Keep up the good work!

[@creativityworld6781]

Try to install 4 stage axial compressor and see the result .. I assume the thrust will be doubled

[@mdikiz6859]

WoW! Impressive performance! Better than expected I am sure.

[@Volavonok]

Grüße an alle Fans des Turbojet-Schubs!

[@johnkelly7264]

WOW! I This is brilliant. Subbed here!

[@zainsigma1732]

Es ist aber Winter... kann man als Heizung benutzen

[@rvdKnives]

Absolut geil, was Du da gebaut hast! *auchwill*

[@dubistverrueckt]

Immer noch tolles Video und Arbeit! I think the nozzle may be the ultimate cause of the failure, though, because yours is convergent-divergent-convergent, when it should be just convergent-divergent since exhaust gas is supersonic.

[@Praendy]

Hi, wieso sollten die Abgase Überschall haben ? Andy

[@Praendy]

Beim J 79, Starfighter/Phantom Triebwerk haben die Abgase vor der inneren Düse etwa 750 m/s. In der Düse werden sie auf etwa 850 m/s beschleunigt und haben dann Überschall. Die normale Schallgeschwindigkeit von 340 m/s kannst du in dem Fall vergessen, da sie bei 15°C stattfindet. Die Abgase haben fast 700°C und die Dichte ist viel geringer. Meine Strahlgeschwindigkeit ist mit 560 m/s bei 590 N Schubkraft kalkuliert. Da bin ich leider noch weit weg von😉 Andy

[@dubistverrueckt]

​@@Praendy Vielleicht sind manche deine Berechnungen nicht richtig? zB hat geringere Dichte _niedrigere_ Schallgeschwindigkeit...

[@Praendy]

Moin, hier geht es hauptsächlich um die Temperatur. Die Schallgeschwindigkeit steigt mit der Temperatur. Geschwindigkeit (in m/s) = 20 x Wurzel aus der Temperatur in Grad K. Z.B. 700° EGT +273° K = 973° K daraus die Wurzel = 31,2 --> x 20 = 623 m/s x 3.6 = 2245 Km/h Ich müsste also mindestens 620 m/s bei 700°C Abgastemperatur erreichen, um in den Überschall zu kommen. Vielleicht ist es mit meinem Nachbrenner möglich😉 Werde es bald testen wenn die momentanen Schubmessungen ohne Nachbrenner abgeschlossen sind. Andy

[@user-bx6lf3pb4v]

Unsere Dachgeschosswohnung wird im Sommer ziemlich warm, wo kann ich denn so einen super Ventilator kaufen?

[@trinitro5968]

Almost 75 psi of thrust, what is your goal? , BTW amazing work! 👏 I would love to see it power a vehicle!

[@inspiration73africasim29]

Wow this is amazing, can you share plans 🙂

[@steev910]

amazing, can you share the plan of this jet engine???

[@Mr-arif]

Wow great from india 🇮🇳

[@williamwinsor7376]

Looks like damage to the turbine from heat. Amazing feat though. Now a more robust turbine design is in order but I congratulate your success.

[@Praendy]

Hi William, there is no damage on the turbine wheel. The strange color is from the "total loss" lubrication and the wheel itself has this shape. The wheel and ngv is made for 710°C steady. My egt is max 660-680. Andy

[@pantherosgaming1995]

the metal annealed itself, which is not uncommon from the heat, but all we can do is speculate until we receive an update.

[@valentin0000]

Sehr geil. Irgendwann möchte ich mir auch Mal eine bauen. Wahrscheinlich kleiner als die hier. :D

[@superskullmaster]

Nice

[@timoterror788]

Sieht super aus - die Turbine ist so stabil das du jetzt ans feintunen gehen kannst. Schon ne Idee für nen realen Verwendungszweck? Z.B. Laubbläser für die gesamte Nachbarschaft :-) - Die müssten dann halt nur den Sprit bezahlen .... ist ja Herbst ....

[@TheAfrobob]

Are you planning on putting it on a 1:6 scale of a F16?

[@FiZziGames]

Ja geil, Jetschlitten im Winter?

[@Praendy]

Wer weiß, wer weiß😉 Danke

[@TheWorldEnd2]

how exactly... do you lubricate a jet engine?

[@ChucksSEADnDEAD]

Ones these size? Usually oil is constantly pumped into the bearings to wet them and as it escapes it gets burned off. So the oil is wasted. The life size ones have bearing housings that seal off the oil from the rest on the engine and recover most of the oil.

[@Praendy]

Hi, Titanium is right. Its a "total loss" lubrication. Oil is mixed into the fuel and a small amount is steady delivered to the bearings. The oil/fuel mix then burns off on the hot turbine and leaves the engine. Andy

[@TheWorldEnd2]

Alright, thanks both of you. I was sort of wondering how the process is possible because of the heat and velocity of the fuel, if it would even have time to lubricate anything if just mixed into the fuel.

[@hamzaterzi8801]

What is the mass of the engine (kg)?

[@Praendy]

Hi, calculated is the mass flow with 1,2 Kg/s, but it semms to be less. With the calculated flow, the engine should reach ~600 N. Andy

[@RaXXha]

@@Praendy What's the weight of the engine itself? :-)

[@Praendy]

Hi, Ahh, did read wrong😉 The mass is 12 Kg, with afterburner 16,2 Kg Andy

[@hamzaterzi8801]

@@Praendy It's as heavy as I thought. Well impressive, very good propulsion, thank you.

[@leontierralta]

Praendy the nozzle turned red hot, are you going to damage your only turbine wheel that you have ?????????? the candle produces a state of fatigue in the steel and a turbine wheel subjected to a constant flame has to fail

[@Praendy]

Hi Leon, it looks more dangerous, than its really is. All videos are made already in dawn, but I use more brightness for the videos. The ngv and the turbine is rated to 70 000 rpm max and a steady egt of 710°C. My egt is well below 660-680°C. So thats not a problem😉 Andy

[@ailijase8]

Very well done

[@3bagusl]

is there an email or anything i can call?

[@oylesinebiriiste6506]

Tebrikler kardesim motor ölçuleri ve projesini benimle paylasırsan mutlu olurum tekrar tebrikler..

[@forloop7713]

At what rpm does it become self sufficient?

[@OkurkaBinLadin]

What?

[@MarterElectronics]

@@OkurkaBinLadin at which rpm does it start basically

[@Kokomanodbuej]

Can you updated it up to 100-1000 KG thrust?

[@thesentientneuron6550]

Hi! What do the wedges do? And does this mean your 'missing thrust problem' is solved? Thanks

[@Praendy]

Hi, there is another video from yesterday. Now I casted 15 wedges and I think, all is working well now👍 Andy

[@dallynsr]

The wedges act like stators and minimize the helical flow losses off the compressor wheel, also increases compressor pressure. Correct me if I’m wrong Andy.

[@thesentientneuron6550]

@@dallynsr Thanks! Wouldn't helical flow be an issue after passing through the compressor, rather than before?(I have no idea how airflow works so I'm asking)

[@creativityworld6781]

Why don’t you push it to 90000 rpm?

[@md.ansarullahansari3134]

আমি ফ্লাই করতে পারব এমনটা ইঞ্জিন হবে?

[@Praendy]

Hi, The engine is much too heavy for flying. Please check my new video. There are some values and much thrust. kzbin.info/www/bejne/imquqndmrrWSi9U Thank you😊 Andy

[@P455w0rds]

I want the blueprints for it 🙂😃😃😁

[@Seadoo233]

You can build it without blueprint. You can make it. I’ll be making one soon for Rc plane. :)

[@sonuc4969]

Bác để em 1 cái nài

[@FusselCNC]

Na da werden die Haare trocken :) Wie lange haste dran gebaut? LG

[@Praendy]

Moin Fussel, angefangen habe ich 2018. Mit einem Jahr Pause ist sie im April 2020 das erste Mal gelaufen. Nach zig Verbesserungen und paar Rückschlägen bin ich "fast" am persönlichem Ziel. 50 Kg😉 Mfg Andy

[@FusselCNC]

@@Praendy Total geiles Projekt :) Rückschläge gibts immer mal, aber normal beim basteln :)