Turbine blades are things of beauty, I got a Harrier Pegasus engine turbine blade, it has pride of place on my mantelpiece.

its kind of hypnotic how perfect blades fit

Watching the blades get inserted was so satisfying.

That level of precision engineering is so satisfying. From the ceramic coated blades to the sound of instalment matched with perfect balancing it’s just pure bliss to the mechanically inclined individual.

Bearings so smooth that the weight of a blade being added to one side makes it turn a bit.

@rickey5353 Blades made in 1953 out of high nickel refractory alloy. Coated with ceramic Thermal Barrier Coating by Avanti Aerospace in 2011.

There is a single stage turbine, which extracts sufficient energy from the combustion gas stream to provide the torque required to turn the 12 stage compressor. Turbine blades have a very different aerodynamic function than compressor blades, and their appearance illustrates this difference.

I worked machining these exact parts for g.e. pratt and whitney etc,the man hours to produce these things was huge,the tolerances on fit was at times less than .005 of a thousand.of an inch. Precision machining is no joke at this level.

Awww, cute little blades. I assembled and serviced industrial turbo pumps for many years, some of the first stage blades were almost a meter long. the biggest was for a gas liquefaction plant on the Sakhalin Islands. It has an axial compressor feeding a radial compressor. The rotor of the axial compressor naked was just on 18 metric tons. Interesting is how the weight scatter on the blades is close to what these little ones are. I love the simple but efficient principles of turbines and how they sound. Thx for the uploads.

@MrPocketWatch1 What may look like a turbine that turns the opposite direction is actually the turbine inlet nozzle. It's fixed to the engine cases, and directs combustion gases at the best angle to efficiently drive the single stage of turbine blades in this engine. There are no engines that use a turbine spinning the opposite direction as a nozzle for a subsequent turbine.

This is truly the most fascinating video on the web.

I have made those type of blades before. I worked in a machine shop that used electro chemical machining. It lets the finish and an shape form easy without stressing the metal

In my childhood I got a fan blade from a pilot from the legendary aerobatic team Frecce Tricolori during an airshow, because I was sitting in the cockpit of his aircraft and told him all about it and how it is functioning and how to fly this aircraft! He was simply so astonished and fascinated from my knowledge about it and I told him that I am addicted to aircraft's and I am very excited to be in this cockpit and I am twelve years old! He said I should go with him to his car and as we went on his car he opened a suitcase and picked the fan blade out and gave it to me and he said it is a gift for me because I am so interested and well educated in flying and on the attachment point to the engine was a little hole in it with a ring inside and since this day I carry this little fan blade on a dogs collar on my neck and I eat sometimes my ice-cream or yogurt with it! The pilot told me that this little thing was once inside the engine of one of his aircraft's right behind the hottest part of the engine and it was from a Pratt&Whittney engine! I love it so very much and I am so proud to have it! 😍😍😍😍😍Lovely greetings from Sarah 🙋💖😍✈️👍

What I meant by a partial career is at the moment I have no idea what I'd really like to do in the future. And if it takes more than two tries at finding my goal career, I'll do it. From the beginning I wanted to be an aerospace engineer, Now I want to be an airline pilot. Yet every time I see a turbine engine up close, they just fascinate me. Thanks to your videos that I've watched for a good 2-3 years now I really do understand how they operate. I'd still love to visit FSJ.

As a Quality Engineer who takes pride in providing quality product to my customers, it bothers me that when we manufacture these blades with the ceramic coating, we have to wear clean white cotton gloves and absolutely no part to part contact.. The specs alone on handling of these parts is crazy, and just to watch you slap 2 parts together and manhandle them with your bare hands is very unnerving.

watching such amazing video makes everything clear regarding imagine the flow of gas through stator's and rotor's blades,which is much better than reading ,thank you so much for really precipus video that let me imaging the gas flow through blades,and imagine changes of velocity and pressure of gas through rotor and stator blades

This channel rules! This is what I really want to see, not just compilations of the same recycled videos.

From the blade weights that I was able to catch in the video, the blades vary in weight by as much as 12 grams from each other....approximately a third of an ounce. I'm guessing that such difference isn't critical to the integrity of each blade under load, but explains why the need to balance the entire turbine disc. But what variable in the manufacturing or coating process would account for as much as a 3-4% differing finished weight of the blades? In a field driven by high precision, I'm surprised at such variability.

I find this video incredibly relaxing when the blades are being installed, that must be one of the most satisfying jobs when resurrecting a jet engine. Love the vids, keep it up!

Cool to think they were stored since a year before my father was born.. thanks for the video👍

When this engine was produced, the turbine blades were uncoated. We have applied a modern process to improve the heat tolerance of the blades. I believe a J47 back in the day went for about 55,000.00US

sliding the blades back in looks like such a satisfying thing!!

I don’t know why I feel comfortable and relaxed watching this😊

@crazyrum It's a roll pin; it's a spring that is slightly larger than the hole you drive it into... and yes centrifugal force tends to push it into the hole.

I love how informational this is!

So well balanced that adding the miniscule weight of a single blade causes the entire assembly to rotate. Very cool stuff, makes me want to build a functional miniature gas turbine engine.

@crazyrum They are a high temp roll pin. You gently tap them into their mounting holes until they protrude into the slots in the base of the blades.

Excellent soundtrack for the assembly video

It's a thing of beauty to see a well made machine.

..once as a thesis, developed a computer program in NPS, Monterey, blade sequence for minimum imbalance, since they weigh slightly different than each other, (i.e.,166blades, 166! factorial different way to place them), yet program used a heuristic way, also this video was very nicely put together....

Beautiful. I’m dreaming about that job 😍

Dear, AgentJayZ and MrPocketWatch. You guys are so close in your conversation when it comes to the next generation of tubine engines. I'll say no more because the patent is still in the works, and I don't have a Pending Patent, but you'll be pleasantly suprised at the simplitcity and also the complexity of things to come.

The blades and turbine were balanced as an assembly before they were then numbered for position, taken apart... then the turbine was intalled in the engine, then the engine was turned horizontal, then the turbine blades were reinstalled as you see here.

Bee. Ee. Ay. You-tiful. Perfection. Each one a miniature aerofoil, an aircraft wing all its own. Actually, given its function, ‘glider wing’ might be more appropriate because *like* a glider wing, the turbine is reliant entirely upon the accelerated airflow incident upon it for lift; or in this case, rotation. Thanks JayZ for all the years of awesome content. And greater thanks for fielding and even *attempting* to answer *some* of the hundreds of questions sent your way. Actually, I’ll rephrase that, to be more accurate: translating so many inquiries into questions that are answerable………and answering them. Thank you.

The best I can figure is that there is something amazing about the symphony of mechanical components working together that makes this so appealing... Of which, mostly men understand.

The ceramic coating to the turbine blades of this J47 is an example of "hot rodding". We have taken a modern thermal barrier coating, and have applied it to increase the performance of this old engine. It was never a service bulletin because the technology was developed after the manufacturer stopped supporting the engine. As far as I know, this is the only J47 ever given this upgrade in thermal protection.

i could watch this stuff all day....

Love new old stock!!. I bought a nos mechanical wind up german alarm clock made in 1977,, i wanted back up in case my mobile died on me,,couldnt resist buying clock made when i was in first year of junior school!!

It slows the heat transfer into the blade from the hot gases, but does not affect the heat transfer out of the blade into the disc, and out of the disc into the cooling air it is supplied with. By how much? ...don't know. At the same fired temperature, it greatly prolongs blade and disc life. At the same projected service life, you can increase fired temp by 50F or so, giving increased power output.

The J47 is a first generation axial flow turbojet. Low compression, low temps, low power... compared to todays engines. Air-cooled nozzles and turbine blades were developed along with higher compression more than a decade after this engine was designed.

Now I know how the blades fit into the main disk. Awesome. I am going to subscribe. Can’t wait for more video’s.

This question is answered below. It gets asked a lot. You guys are very curious !

That was naughty banging 2 blades together

I'm surprised the weight varies so much blade to blade. I wouldn't expect more than a gram or two difference in high precision, identical and relatively small parts but there is more than 10g between some of them.

That was one of the best videos I ever saw explaining how this thing really works! Thanks!

ohhh...gosh, that was my dream job, touching handling such a beautiful finest engineering product

Don't know for sure... but I would guess it is just the way things go in production.

Hello fella , I just would like to say tnks about your videos , Im are AMT instructor and inside of class room the students are just fascinated . My best regards from São Paulo Brasil. Alex

Nice video..i m happy that i used to repair those blades...hpc and lpt..Airfoil..

It's very hard that TBC I spent many hours polishing them with diamond pads, what a few of you watching may not know is each one of those buckets (blades ) is weighed and that data is fed it a computer that works out where on the wheel they go in relation to each other for perfect balance hence the numbers

We sweep the floor every day, so a carpet would get dirty real fast. But a rubber work mat for jobs like this is a good idea !

Imagine forgetting to install just 1 pin lock for the blades, just 1 is enough to destroy the engine!, this is some super delicate stuff that I do not ever wanna mess with.

@docbipe Aahh,.... I can show you some of the techniques used by jet people, but to learn all of them, you must become one of us...

@FrontSideBus yes, it was the nozzle we opened first...

Making those blades is a Herculean task. GE perfected it.. They denied us the core engine tech. Never mind! We still admire their hardwork, skill, and finesse.

Originally created in the Admiralty Materials laboratory in Holton Heath Dorset. Also where the space shuttle tiles were developed.

Chromalloy has a joint-venture in Middletown, NY which is one of the largest operations of its type for surface treatment of turbine blades...

I'm looking for a turbine blade that contains platinum. Are they available for purchase? Thank you.

Thank you for putting this things in internet super sir

I suppose... most sources call the turbine mounts firtee because they look like fir trees. The mounts on most compressor blades are called dovetail because, like the carpentry joint, they look like doves' tails. Calling a turbine blade a bucket, and calling the mount a dovetail is a bit like calling the rear gate on a pickup a hatchback... not totally wrong, but just different enough to raise a questioning eyebrow.

@1metiz New? 2500.00 but you can't get these anymore. To obtain one as a souvenir... their value is not measured in money, but in resoucefulness, courage, and a willingness to thrash back the boundaries of the great unknown. An aviation scrap yard would sell them for the price of their mostly nickel content.

There is no power turbine in a turbojet like the J47. And the J47 uses a single stage turbine, so this is the first, last, and only stage... The alloys have not changed a whole lot, but engines are firing hotter because of advancements in blade-cooling technology. Beyond the scope of my little channel, really.

Ceramics have been able to withstand combustion temperatures of jet fuel since before humans wondered what that black stuff was that stuck to their feet while they were looking at the animals trapped in the pit full of it.

made me cringe, watching those blades been tapped together !!

love how that guy cleaning the floor is just pushing it under the step ladder thing

Geezz this is awesome man....i like you re vids .....i like them a lot....very informative....keep up the good work!!!

Dare I ask what that set of new old stock blades cost before the ceramic treatment? After the ceramic treatment? Awesome work! :)

I think the coating here is on a stage of the compressor section and that the coating is to prevent erosion on the blade surfaces that wears them down to where they will not function. You know like when you have someone sandblast your teeth to a fine point. I hate when that happens.

Those are just beautiful

"should i drop it on the floor?" lol

Hey man, great work!! You really improve my theoreticall skills before making my attempt to ATPL theory exams :) Thanks.

I like how he tapped them together to make themvring.

I wish I had become an aircraft mechanic! Instead I went into health care.

JayZ. When you say ceramic blades, /do you mean metallic blade with a ceramic coating? Wow! and from 1953? Incredible!

Thanks. Its hard to get a get a look at that end.

the ceramic can witstand heat but isnt it BRITTLE??

watching this is extremely satisfying

thanks for introduction，very nice！

I appreciate your work great minds

These are withouten Coolsingel whiteboards Some of them ABB use for the first stage And Second stage blades with cooling And the Thierry stage also does not use Cooling holes

Old video but good work jay

it was a good soundtrack. very nice

blades in place , and engine is redy for turbo boost , nice video ,,,,!!!!

ive had the luck to be shown and taught the process to apply the TBC.

Why are all blades mounted in the way that allows them to move a little and make this clicking sound? Is it clearance for heat expansion?

Satisfactory video

Without internal cooling I don’t see why bother with getting YSZ on them other than to prevent oxidation if that’s a concern but then you could just get them bond coated and do just fine. Not sure what aftermarket cost difference looks like but with such thin blades the top 3/4 won’t even know the bottom is being cooled by contact with the ring/hub Also the variance is somewhat on purpose to deal with harmonics. You don’t want every single blade to enter their intrinsic frequencies at once that would end .... poorly. Edit : stop calling them ceramic blades , that’s a whole other thing being worked on with cmcs

I love how terminology differs in the same industry from company to company. We call them dovetail slots, but I tend to agree with you Jay, they look like fir trees.

cool stuff. Balancing is a pain. When you are new.

1:26 Just curious, why is the guy tapping the blades together? Aren't you supposed to ever-so-carefully avoid such things?

2:40 process of mental joy and satisfaction begins 😁😁 would see whole disk without skipping👍 Jay, thank you for sharing this all with us! ..and where I was before?😂

BEAUTIFUL! Engineering at it's best!!

Just when I thought I had some cool projects going on in my shop.

Hi AgentJayZ, i really love your channel ! i have a question that perplexes me for some time. some applications use this fir tree root with z-lock shrouds. i never understood how are they assembled. must they be assembled all together ?

I like your work

is there an wear coeffecient for the buckets as they spin through air? does a ceramic coating reduce it? if so is the wear dependent on temperature and humidity ?

so they were made in 1953 and never used? Or made recently and modeled after the ones in 1953?

When that gentlmen tapped the ceramic of the turbine blade. I reacted like fingernails down a chaulk board. I build racing engines. Something like that would be all it takes to prevent me from putting the component into service. Yikes! 😳

I can honestly say, i dont miss removing Service Run Blades on a Siemens G Machine AT ALL! Especially Row 16😑😫

Since this is an old video, I may not get an answer. Anyway, I'm assuming you numbered the blades because you wanted to keep the balance of the whole assembly. If those blades were recoated, wouldn't that make the numbering unnecessary? I would assume you'd have to balance the whole thing again since the blade weights would be different -- or would they?