leokimvideo both lego and fiery jet engines combined beats Lego alone.

Jet turbines MUST be dynamically balanced. If not they will grenade and either injure or kill you.

It looks like each blade is keyed, and only axial motion is prevented by the clamping plates.

@@FloorItDuh you're mistaken. Unbalance wo.t cause an engine to 'grenade'. It'll just beat the snot out of the bearings and come to a crunchy halt. 'Grenading' involved blade shedding and or disk burst, the later being the most dangerous. Overspeed and/or too much time and heat is usually the cause, but not unbalance. Depending on the matrrials he's using that is certainly a very resl risk. I wouldnt stand in the planes of rotation of this engine.

How did you build the turbine blades?

'illegal bulbs' !?!?? what country do you live in lol

California then?

i dont thinks

hahahahahha, it was nice!! :)

Mister Eugene Krabs no cant u read.

he also needs to add an airfoil to the blades, atm the compressor wont compress any thing. Also I think the combustor will melt. this engine will most likely never start, or it wont self sustain at least. this is rather comical watching this in fact.

Ozzie Peck at least this is not a classical "tin can jet"))))) We shall see, ok?

for fuck sake... do you have any idea how complicated it is to design, let alone calculate a axial flow compressor? I've been studying them in my spare time, for four years, and I still cant do it. There exists not a single airfoil on those blades, the turbine stage in the second video has no airfoil, there are no stators after the combustor, the combustor is too large, the fuel is burning wrong, every thing is wrong with this engine, hes not made another video because it did not work.

Ahahahaha lol

Also as far as I understand there's no point having many stages with the blades at the same angle, each subsequent stage is supposed to have a more aggresive angle so that the Angle of Attack keeps up with the increasing speed of the flow after the previous stage. The one in the video looks well made but the angles are same or really close. Unless of course there are three different shafts rotating at different speeds.

Andrew Zaborowski not really . air gets compressed because it gets narrow at the end. air moves slower at end means higher pressure

Also that’s not the compressor it’s the turbine

@@andrewzaborowski9685 the whole point of the the blades is to accelerate the air into a stator vane that slows down the air and redirects it into the next blade which causes compresion. as the air intake rate of the engine increases this effect becomes less efficient so the engine would need variable angle stator vanes to accommodate for diffrent air velocities and angles.

You don't need stators if you're not making axial flow turbines

It's Duke he still need them

Mr. Inetical That is wrong.

It has nothing to do with generating lift. It all has to do with increasing the velocity and pressure alternatively. 100% of working jet turbines have airfoil designs in their blades. Even in the very first working jet turbines no one used flat pitch blades because it doesn't work. This concept has been well understood for decades. Even back when propellers were what ruled the sky this concept was understood.

The stator vanes are what is responsible for converting the high velocity air into high pressure air. Bernoulli's principle. The only job the turbine rotor blades serve is to move the air through the compressor section and at the power turbine section, convert the hot combustion mix to energy used to self sustain the turbine and dependent on application generate thrust. You will not move air through the engine if the blades do not have an airfoil design as they will not push the air effectively and cause it to surge back especially given there is no compressor bleed valve to eliminate high pressure that is built up in the rear of the compressor section. I'm working on obtaining my FAA A&P ratings. I am very well versed in the technical and engineering aspects of gas turbine engines.

While you are right on the principle the practical reality is the flat blades in the terms of how small a miniature version of a turbine such as this would not work because you cannot scale them effectively in terms of the compression ratio required for a self sustaining turbine. Once you understand that most of the air in a turbine goes to cooling the engine (so you don't melt the hot section), then sustaining the engine, and lastly actual thrust you can quickly realize why everything about the engine needs to be as efficient as possible. You will notice that turbines whether in the power section or compressor section have the maximum amount of blades as is volumemetrically efficiently possible to maximize efficiency. The tighter your tolerances in the engine the better it will perform hence the invention of shrouded blade tips, wear grooves, compressed compressor and turbine housings, etc. You must have a compression ratio of 1.25:1 per stage with anywhere from 5 - 8 stages of compression to effectively compress the air enough and feed the engine enough air for it to run correctly. The steeper you make the blades the harder it is for air to flow through them. It really is that simple. You want maximum amount of airflow through the turbine in the easiest fashion possible so it doesn't choke which will happen if the blade design is not efficient.

Why do I get the feeling you had just seen a video on jet engines right before you posted that comment, and thought you were automatically an expert. Your tone, and repeated long, aggressive comments pretty much discredit you. I'm no professional when it comes to jet engine compressors, but I have seen a model run with flat blades. It uses inertia like a turbine (hence *turbo* jet) to compress the air through holes along the bottom bulkhead that the compressor sits on. In nearly every jet engine, there are short stubby blades as the last set on the compressor, and that is their job, in most cases anyway.

Thank you so much! :)

It will never work.

Thank you! :)

Shaahin Ashayer

It's extremely complecated to get an airfoil shape, and for an axial turbine the angle of attack must be constant so it must have the right twist to it. good luck with that.

Yes

How width is the cooper pipe? and.. How have you made the fuel output? Excelente combustion chamber. I'd like to see how it's going :D