The old GTM160 micro jet engine in service. Complete disassembly of the engine, repair and assembly.
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- Опубліковано 23 чер 2020
- The problem was about excessive exhaust gas temperatures. In addition, there was an uneven distribution of temperatures in the discharge nozzle. Initial diagnosis:
- burned evaporator or
- clogged pipe feeding fuel to one of the evaporator or
- distorted wall of the combustion chamber or a combination of the above
The first assumption proved to be right. The evaporator tube is replaced and the engine works perfectly.
The film does not show only the evaporator replacement and dynamic balancing of the turbine rotor.
Repair carried out in: jetpol.tech/
Film design: JETPOL
Music: elements.envato.com/ - Наука та технологія
Wow I love watching real workmanship! Fantastic video thank you very much for sharing
Great job my friend , this video really helped me alot in understanding the practical design of a jet engine 👍🤞
Awesome video and great insight, cheers
Please post more videos like this. It's interesting!.
Hi JETPOL, love your channel, thanks for posting this. It actually helped me understand a problem I've been having with one of my engines. 👍👍To the haters, It's even more annoying if you play it at 2x speed with headphones on 🚀🚀💥💥😂😂
Thank you, in this way I can understand what is in the ajet engine
Superb skills. You are no less than God. I would gladly work for u free of cost. Keep going.
Wow awesome loved everything
The compressor's diffuser and the NGV .I wish you can give more details about them.
Greet job!!
Thanks a lot for sharing this
You are Very Professional 👏👏👏👏🇧🇷
the video was step by step,I understand more
great information 👍
That ball bearing!!! Wow!!
Exelente trabalho amigo. Parabens
This is dope man 👨 🙌 👌 💯💯
What are the perfirations in the center of the engine for? I get allowing air to enter the combustion chamber but wby as seen at 5:09 are there holes for the center. The hot gasses are escaping directly backwards to the fan. Or, do they enter through the center some how as well? How are the hole sizes and placement determined and why are they not all uniform?
Simple and clear I like you and I love this video
Thanks :-)
@@JETPOLPoland if someone wants to contact you,how can I reach you?
even through the website.
@@JETPOLPoland I have texted via Facebook waiting for a response
I do not see. Via email please.
Veamos, hay un roce en la tobera de aspiración...se desmonta la turbina y encuentra un vaporizador roto, lo cambia, para montar de nuevo la turbina cambiando un rodamiento. Verifica el paralelismo del espaciador del compresor, cosa que no puede variar a menos que ya estuviese mal fabricado.
En cambio no se ve que haya verificado el salto del eje ( run-out), cuando es lo primero que yo hubiese hecho tras tener daños en la tobera, tampoco veo que se haya inspeccionado el compresor para determinar daños. Por ultimo imagino que volverá a re-equilibrar el rotor, o lo deja así?.
Thanks
How much run time on this turbine before it had to be serviced?
Why not show the balancing of the turbine? What is the bearing type and number?
Whats the gas torch used? Propane or hho?
Did you not show the evaporator repair or did I miss it? (With all the ads jumping out these days, misses do happen)
Me he quedado sorprendido que pulso tienes , has sujetado un rodamiento que giraba durante 50 segundos, ¿eso significa algo?, quizás que esta bien para reutilizar? o que le falta la precarga y por eso puede girar 50 segundos.....
Let's see, there is a friction in the suction nozzle ... the turbine is disassembled and finds a broken vaporizer, changes it, to reassemble the turbine by changing a bearing. Check the parallelism of the compressor spacer, which cannot vary unless it was already poorly manufactured.
On the other hand, it is not seen that the shaft jump (run-out) has been verified, when it is the first thing I would have done after damaging the nozzle, nor do I see that the compressor has been inspected for damage. Finally, I imagine that it will re-balance the rotor, or does it leave it at that?
where and how can i get experience in repair, maintenance in micro jet turbine engine ? I live in the US i dont see anything how to fix them unless i work for the company
Best video on internet can i get a job in jet engine company
Good afternoon. Thank you for the video. I have a BadG error. The candle doesn't work. Tell me, please, what is her resistance?
The candle is welded by laser welding. As I understand. I plan to make a small technological opening, next to the regular candle, on the side. Without disassembling the entire engine. And introduce a new heating element.
Hello, when cold, the plug is practically a short circuit. As a cold plug, it draws 15-20 amps at nominal power (for 1-2 seconds). The current drops after a few seconds to a few amperes.
i'm confused, how's the lubrication system works? is it not going to mix with the fuel? or is there some type of seal to contain the oil. any inputs would be a big help
Fuel oil mix.
Masha allah bro love from pakistan 🇵🇰
How does the oil system work? I dont see many people covering it. Like where does is spray from and what does it keep lubricated?
look closely 11:57 It's the only time you can see anything. Take a good look. :-)
cool
How vaporizers heat up from cold start? I reckon in modern model engines they only need a fuel tank without butane(from Kurt Schreckling’s book) to preheat the tubes at the start, is there an electric heating element or other method used? I’m on my graduation project of building a gas turbine engine.
Here's your answer. The ceramic glow plug is used to ignite the initial dose of fuel to heat the evaporators. ua-cam.com/video/cvUCuSP6EPs/v-deo.html
@@JETPOLPoland thanks a lot for the answer. Me and my team will try incorporating this for our engine.
✋....... super
What is the name or number of the bearing?
Nice video, does the engine not have a thrust bearing? sorry if I missed it.
The engine has two hybrid angular contact bearings. They are visible in the video.
Amazing, little engine! What type of O-ring it is used for the hot part of the engine, that does not melt? I was amazed to see an O-ring change! And from the video I can see an turbine bearing being replaced as well or am I wrong?
The O-ring is made of Viton.
Was this hard to build and what all parts did you use for it to build the engine 🤔
The guy was just servicing it... not real manufacturing or building anything... this engines usually get rebuild every 50 hours of service...
👍👍
Hi, where can i find these ceramic ball bearings in europe? any idea? thanks
GRW in Germany
Is balancing necessary, or it can work without balancing?
Balancing is obligatory
Why is the flame pipes pointed towards compressor when the air moves the other direction?
this is a reverse flow evaporator design. The mixture must be supplied at the bottom of the combustion chamber
Dear Sir, what type of bearing did you buy, the first time I saw one bearing like this, what's P/N? What Brand?
Hello, the bearings for our engines are made to our order in a German factory, but you can use typical hybrid angular contact bearings from GRW.
@@JETPOLPoland Hello my friend, it is just for my knowledge, I never saw one bearing keep movement softly and for such a long time, wow, fantastic.
brother what type of bearing you used here???
these are hybrid angular contact bearings 22x8x7. Ceramic balls Si3N4
Updet more and more learning Video.
How do you install magnetic for hall rpm sensor?
Here is the optical RPM measurement
GTM160 Micro jet
not balanced ?, I had a problem with the inlet tube for the burner was too bent causing obstruction, it was not necessary to disassemble the rotating assembly
Congratulations, good job!
Balanced of course, just not shown in the video.
Congratulations and thank you for sharing
Tekyou very mucs
What type of metal are used to avoid that engine melted when the engine achive hight tempeture?
Inconel 713 is used for the hot part of the engine
@@JETPOLPoland can tou share THE ptojct o u project is for busness propouse?
Unfortunately, I can not. It is within the scope of JETPOL's activity
@@JETPOLPoland thanks for leading the way.
How does the bearings lubrication system works ?
Ceramic bearings dont need lubrication
Here we have hybrid bearings, not entirely ceramic. They are lubricated with fuel with the addition of oil. A very small amount of the fuel passes through the bearings.
Aren' the other evaporator tubes already close to their demise as well? I would expect they will fail soon too, requiring this overhaul again...
No, the other evaporators are in good condition. I didn't have to do anything. The reason for the burnout of this one was a slight deformation of the outer shell of the combustion chamber
Are there real-time video available?
Options, playback 0.25 speed.
Do these bearing get lubricated?
If so, then how
Yes, they are lubricated with a small amount of fuel which contains 3-5% oil.
@@JETPOLPoland But I didnt see any pipe in the shaft tunnel, also how many bearings it has?
Hello..Thanks alot for detailed guidance. i hv an AMT Olympus 23kg micro jet engine. the problem is that max thrust is not achieved. i get max 19Kg thrust whereas the RPM is maximum. however, EGT is 100 Deg C lesser...What could b problem? ambient conditions are unchanged.. i donot know why EGT is suddenly reduced by 100 Deg C
Hello, there may be several reasons. One of them may be deformation of the combustion chamber. It is really difficult to determine without measuring and examining the engine. Maybe the nozzle is distorted. Since the EGT is still low, it can gently choke the outlet nozzle. This will accelerate the stream of exhaust gases. Most, however, I suppose that the problem lies in the combustion chamber.
@@JETPOLPoland is there a difference in design between the tiny engines and bigger ones like the jetcat 1000 pro?
Or is it just the increase in compressor,turbine and combustor size while keeping the same design
The difference in engine thrust is related to the amount of air forced through it and the temperature gradient. So, in principle, the engines are similar to each other. The differences arise in terms of efficiency (number of compression stages and power take-off), safety systems, bearing lubrication concepts, and the perfection of flow channels. Micro and large jet engines follow the same laws of physics, but their design is very different. In the case of two relatively small engines, which differ essentially in the thrust force, the differences mainly lie in the size of the compressor and turbine, and thus in the amount of air mass (mass air flow).
@@JETPOLPoland how about compressor to turbine wheel ratio
Does the turbine wheel size affect the compression ratio of the engine?
More than one book has already been written about it :-)
The task of the turbine is to collect the energy of the exhaust gases and use it to drive the compressor. The compressor uses the greatest amount of energy to build up pressure in the chamber, and is the most responsible for compression. A diffuser located just behind the compressor is designed to stop this compressed air as quickly as possible without losing temperature. The greater the efficiency of the compressor (the arrangement of the compression wheel and diffuser), the greater the compression ratio. The larger the turbine wheel, the larger the compressor can be driven. I mixed it up a bit, but I hope it's understandable :-)
Do you intend to run this turbine without rebalancing it?
Of course I'm not going to :-). Without balance there is no chance. The video does not cover this operation.
From where i can buy this GTM 160 micro jet engine
go to the website www.jetpol.tech
Why are the fuel injectors facing forwards instead of back?
because the fuel must evaporate in the evaporator and reach the beginning of the combustion chamber in gaseous form.
@@JETPOLPoland interesting, thank you for the quick response
Jabran Imran this also allows gases to cool down before hitting the turbine blades and avoid damaging it, that’s why the holes in the combustion chamber are bigger closer to the turbine.
jet engines are powerful yet simple
Only seemingly. The problems lie in the details.
Why do you use copper antiseize rather than nickel?
What element are you writing about?
@@JETPOLPoland It looks like you're using copper antiseize on the bolts at 17:25
5.imimg.com/data5/IK/IO/MY-13488062/loctite-copper-based-anti-seize-lubricant-500x500.jpg
Nickel antiseize is better for high temperature applications and nickel alloys (stainless steel, inconel, monel, etc) like the materials used in the hot end of a jet engine
4.imimg.com/data4/BA/SI/MY-5707749/nickel-anti-seize-lubrication-500x500.jpg
Some information here:
agradetools.com/best-anti-seize/
www.saftlok.com/safteze/stainless-steel.htm
This is what I use, but any nickel anti-seize (without copper or aluminum) will work:
www.amazon.com/Permatex-77124-Nickel-Anti-Seize-Lubricant/dp/B0002UENJ2/
This is intresting. I have to try. Thanks for the advice.
hi, what is the model of this mini torch? (4:45)
Hello, this is the Shustar V9-LED
@@JETPOLPoland sorry my question is for mini torch weld oxygene acetylene what is the model?
:-) OK, this is a miniature Rothenberger burner
why do these jet motors have so much pitch on the blades when the everyday propeller planes have nearly none??
This is due to the much greater velocity of the exhaust gases in relation to the velocity of air flow during flight. If I understand the question correctly.
How much does it cost to overhaul the engine? In U S dollars
And how can you determine it without even seeing the engine with your eyes? Can you imagine? I can not.
Tell me something website how to buy jet engine ??
This probably shouldn't be difficult. Best:
1. choose a manufacturer
2. choose a specific engine model
3. order
4. pay
5. wait for the courier
Isn't it simple?
Gtm 160
Better tell me that bearing spin is necessary
Que tipo de rodamientos usan
hybrid bearings type 608 (708)
How that fuel tube works at 6.45
The fuel flows into the hot tube of the evaporator and evaporates there turning into gas.
Dónde puedo conseguir el motor
Producer - JETPOL. Sales only in Poland
Brother, what is the price?
2000 dollars
Are the evaporator tubes Inconel?
here Alloy 600 material is used ( Equivalent to the name: 2.4816 / NiCr15Fe / Incoloy®600 / Nicrofer®7216 / Ni15Fe )
Would have been a lot nicer with comments instead if music
I buy you one??
HELO I WONDER IF YOU HAVE JET ENGINES WITH 30. TO. 50 KL.. OF RTUST POWER AND HOW MUCH aNd if have any
financial plan...?
100N, 140N, 160N, 180N only,
or WHAT'S
THE MOST
OR TRUST ON POWER
I HAVE A PROYECTS
SINCE I WAS 12 YEARS AGE
excuse me,
but, what was that?! @6:00~6:25
This is a ceramic glow plug. It is needed to ignite the fuel when starting.
Good morning Sir. I'm new Supporter here. I want to buy EQUIPMENT ELEMENTS
ENGINE AND STATIONARY
And
CONTROL AND CONTROL MODULE
How much is cost?
I want
The music is really annoying and the video is moving way too fast to really observe what's being done.
Why the mindless music , can't stand it .
Now I won't change anything, please turn off the speakers.
why all rc turbine brands clone each other ??????
How many different ways are there of building an axial turbojet?
This is a Centrifugal flow engine and yes you could make it slightly differently.
But there would be no value in that... Even the engines in cruise missiles
use this same type of engines.. if it works why fix it.
Podawanie jakiegokolwiek paliwa do "komory spalania", jest pozbawione jakiegokolwiek sensu, jeśli dobrze pozna się zasadę pracy turbin gazowych... Sprężone powietrze jest paliwem samym w sobie! Podawanie paliwa do komory SPRĘŻANIA jest jak dolewanie do zatankowanego samochodu wysokoprocentowej whisky, w nadzieji że poprawi to osiągi!
Nooo, dość śmiała teoria. A skąd to sprężone powietrze? Tak samo nachodzi i się spręża?
@@JETPOLPoland hahhaha dokladnie. Rider chyba wypil za duzo wysokoprocentowej whisky
Music ruined this video..
Then please turn off your speakers. There are no other sounds, so you won't lose anything.
@@JETPOLPoland You should let us hear the sound of the tools. and various metals
Too fast to really see anything. I slowed it down but it was no use.
There is not much to these engines....I dont understand why they cost $2000-$5000. there is no more then $50 in materials. How do they justify the crazy high price.... especially when they are built in china.
That's what I thought too 20 years ago when I started this adventure. Now I think differently. Our engines are not made in China.
@@JETPOLPoland Congrats on hitting the 20 year milestone on your adventure. There may not be much to the engine but there is surely a lot to bringing a jet to market!
The materials that go into a microprocessor are pennies but the chips can cost thousands.
The r&d alone can be a large proportion of the cost. Then factor in scale and manufacturing tolerances.