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!
@tubekrake2 жыл бұрын
Now I wonder why is it so hard to copy the design of the professional engines and get the same Efficiency.
@creativityworld67812 жыл бұрын
PBS TJ-100 generates 292 lpf (132kg ) of thrust
@johnded38742 жыл бұрын
@@creativityworld6781 I think you are right, my bad.
@zainsigma17322 жыл бұрын
Es ist aber Winter... kann man als Heizung benutzen
@creativityworld67812 жыл бұрын
Try to install 4 stage axial compressor and see the result .. I assume the thrust will be doubled
@amnesie66152 жыл бұрын
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...
@Praendy2 жыл бұрын
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
@Volavonok2 жыл бұрын
Grüße an alle Fans des Turbojet-Schubs!
@trinitro59682 жыл бұрын
Almost 75 psi of thrust, what is your goal? , BTW amazing work! 👏 I would love to see it power a vehicle!
@TheJonnyvolts2 жыл бұрын
You and Ramy RC, collaboration, make it happen lads!
@williamwinsor73762 жыл бұрын
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.
@Praendy2 жыл бұрын
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
@pantherosgaming19952 жыл бұрын
the metal annealed itself, which is not uncommon from the heat, but all we can do is speculate until we receive an update.
@oylesinebiriiste65062 жыл бұрын
Tebrikler kardesim motor ölçuleri ve projesini benimle paylasırsan mutlu olurum tekrar tebrikler..
@user-bx6lf3pb4v2 жыл бұрын
Unsere Dachgeschosswohnung wird im Sommer ziemlich warm, wo kann ich denn so einen super Ventilator kaufen?
@mdikiz68592 жыл бұрын
WoW! Impressive performance! Better than expected I am sure.
@pantherosgaming19952 жыл бұрын
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!
@superskullmaster2 жыл бұрын
Nice
@jonginder54942 жыл бұрын
That’s amazing. I can’t believe it turns the big propeller in the background 🤣🤣🤣
@Praendy2 жыл бұрын
Hi Jon, the engine is responsible for producing electrical power if there is no wind in Germany.😉 Andy
@leontierralta2 жыл бұрын
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
@Praendy2 жыл бұрын
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
@inspiration73africasim292 жыл бұрын
Wow this is amazing, can you share plans 🙂
@FiZziGames2 жыл бұрын
Ja geil, Jetschlitten im Winter?
@Praendy2 жыл бұрын
Wer weiß, wer weiß😉 Danke
@TheAfrobob2 жыл бұрын
Are you planning on putting it on a 1:6 scale of a F16?
@hamzaterzi88012 жыл бұрын
What is the mass of the engine (kg)?
@Praendy2 жыл бұрын
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
@RaXXha2 жыл бұрын
@@Praendy What's the weight of the engine itself? :-)
@Praendy2 жыл бұрын
Hi, Ahh, did read wrong😉 The mass is 12 Kg, with afterburner 16,2 Kg Andy
@hamzaterzi88012 жыл бұрын
@@Praendy It's as heavy as I thought. Well impressive, very good propulsion, thank you.
@steev910 Жыл бұрын
amazing, can you share the plan of this jet engine???
@johnkelly72642 жыл бұрын
WOW! I This is brilliant. Subbed here!
@rvdKnives2 жыл бұрын
Absolut geil, was Du da gebaut hast! *auchwill*
@ailijase82 жыл бұрын
Very well done
@dubistverrueckt2 жыл бұрын
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.
@Praendy2 жыл бұрын
Hi, wieso sollten die Abgase Überschall haben ? Andy
@Praendy2 жыл бұрын
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
@dubistverrueckt2 жыл бұрын
@@Praendy Vielleicht sind manche deine Berechnungen nicht richtig? zB hat geringere Dichte _niedrigere_ Schallgeschwindigkeit...
@Praendy2 жыл бұрын
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
@P455w0rds2 жыл бұрын
I want the blueprints for it 🙂😃😃😁
@Seadoo2332 жыл бұрын
You can build it without blueprint. You can make it. I’ll be making one soon for Rc plane. :)
@creativityworld67812 жыл бұрын
Why don’t you push it to 90000 rpm?
@sonuc4969 Жыл бұрын
Bác để em 1 cái nài
@SIpalingtauu2 жыл бұрын
is there an email or anything i can call?
@Mr-arif2 жыл бұрын
Wow great from india 🇮🇳
@md.ansarullahansari3134 Жыл бұрын
আমি ফ্লাই করতে পারব এমনটা ইঞ্জিন হবে?
@Praendy Жыл бұрын
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
@timoterror7882 жыл бұрын
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 ....
@TheWorldEnd22 жыл бұрын
how exactly... do you lubricate a jet engine?
@ChucksSEADnDEAD2 жыл бұрын
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.
@Praendy2 жыл бұрын
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
@TheWorldEnd22 жыл бұрын
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.
@KimKGlory2 жыл бұрын
Can you updated it up to 100-1000 KG thrust?
@valentin00002 жыл бұрын
Sehr geil. Irgendwann möchte ich mir auch Mal eine bauen. Wahrscheinlich kleiner als die hier. :D
@thesentientneuron65502 жыл бұрын
Hi! What do the wedges do? And does this mean your 'missing thrust problem' is solved? Thanks
@Praendy2 жыл бұрын
Hi, there is another video from yesterday. Now I casted 15 wedges and I think, all is working well now👍 Andy
@dallynsr2 жыл бұрын
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.
@thesentientneuron65502 жыл бұрын
@@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)
@forloop77132 жыл бұрын
At what rpm does it become self sufficient?
@OkurkaBinLadin2 жыл бұрын
What?
@MarterElectronics2 жыл бұрын
@@OkurkaBinLadin at which rpm does it start basically
@FusselCNC2 жыл бұрын
Na da werden die Haare trocken :) Wie lange haste dran gebaut? LG
@Praendy2 жыл бұрын
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
@FusselCNC2 жыл бұрын
@@Praendy Total geiles Projekt :) Rückschläge gibts immer mal, aber normal beim basteln :)