The old GTM160 micro jet engine in service. Complete disassembly of the engine, repair and assembly. 

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.

Balanced of course, just not shown in the video.

Congratulations and thank you for sharing

The O-ring is made of Viton.

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.

Fuel oil mix.

Balancing is obligatory

There is high pressure air all around the combustion chamber so air flows into all the holes. Some are designed to allow air in to keep the flame from making constant contact with the metal combustion chamber. Air flowing in all around in all the small holes keeps the flame in the center of the chamber to prevent burning/melting of the combustion chamber itself.

Here's your answer. The ceramic glow plug is used to ignite the initial dose of fuel to heat the evaporators. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cvUCuSP6EPs.html

@@JETPOLPoland thanks a lot for the answer. Me and my team will try incorporating this for our engine.

go to the website www.jetpol.tech

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

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.

The engine has two hybrid angular contact bearings. They are visible in the video.

Only seemingly. The problems lie in the details.

GRW in Germany

Options, playback 0.25 speed.

these are hybrid angular contact bearings 22x8x7. Ceramic balls Si3N4

The guy was just servicing it... not real manufacturing or building anything... this engines usually get rebuild every 50 hours of service...

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?

look closely 11:57 It's the only time you can see anything. Take a good look. :-)

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?

Of course I'm not going to :-). Without balance there is no chance. The video does not cover this operation.

this is a reverse flow evaporator design. The mixture must be supplied at the bottom of the combustion chamber

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.

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.

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.

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 :-)

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.

Two knobs so hho.

And how can you determine it without even seeing the engine with your eyes? Can you imagine? I can not.

Swiwin USA charges $350 for 25 hour refurbishment.

100N, 140N, 160N, 180N only,

or WHAT'S THE MOST OR TRUST ON POWER I HAVE A PROYECTS SINCE I WAS 12 YEARS AGE

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.

Here is the optical RPM measurement

The fuel flows into the hot tube of the evaporator and evaporates there turning into gas.

2000 dollars

He doesn't want to give away all his secrets.

Producer - JETPOL. Sales only in Poland

This is a ceramic glow plug. It is needed to ignite the fuel when starting.

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

hybrid bearings type 608 (708)

Now I won't change anything, please turn off the speakers.

here Alloy 600 material is used ( Equivalent to the name: 2.4816 / NiCr15Fe / Incoloy®600 / Nicrofer®7216 / Ni15Fe )

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.

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

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

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.