The turbine blades have had a ceramic thermal barrier coating applied, and now we install them into the J47 engine which will be installed in an F86-F Sabre.
Пікірлер: 595
@Wonkabar00713 жыл бұрын
Turbine blades are things of beauty, I got a Harrier Pegasus engine turbine blade, it has pride of place on my mantelpiece.
@stephensmith7994 жыл бұрын
Agreed. It is as if they are 'designed by nature'
@jessesteven33243 жыл бұрын
You probably dont give a shit but does someone know of a method to log back into an Instagram account..? I stupidly forgot the password. I love any tips you can give me.
@arjunterrence41493 жыл бұрын
@Jesse Steven instablaster ;)
@stephensmith799 Жыл бұрын
@@acbulgin2 The more I look at turbine blades the more sense they make of velocity, fluid dynamics, power transfer etc. They seem ‘truth-telling’ somehow 🤔
@stephensmith799 Жыл бұрын
@@acbulgin2 Wonderful observations. Your post is also crafted beautifully. Made my day, though it is night here.
@spowyou9 жыл бұрын
its kind of hypnotic how perfect blades fit
@Scott_C4 жыл бұрын
Watching the blades get inserted was so satisfying.
@Blazs120gl3 жыл бұрын
Thanks for sparing me the comment. :)
@RCrosbyLyles3 жыл бұрын
Yeah, but no, really. What is that?
@ddegn3 жыл бұрын
I came down to write the same thing.
@tristandoran601 Жыл бұрын
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.
@jackkatogh8 жыл бұрын
Bearings so smooth that the weight of a blade being added to one side makes it turn a bit.
@exodu2667 жыл бұрын
Jack Bruce yup I was amazed by that
@GamingAmbienceLive6 жыл бұрын
perpetual motion
@alexanderdasko34446 жыл бұрын
Lol
@alexanderdasko34446 жыл бұрын
I wonder what kind of bearings those are
@peteholmes77805 жыл бұрын
Amazingly smooth
@AgentJayZ13 жыл бұрын
@rickey5353 Blades made in 1953 out of high nickel refractory alloy. Coated with ceramic Thermal Barrier Coating by Avanti Aerospace in 2011.
@nicholasmaude69064 жыл бұрын
They were made from some variant of Inconel?
@mikehermesmeglio4 жыл бұрын
@@nicholasmaude6906 yes. There are a bunch of names for nickel based super-alloys.
@AgentJayZ12 жыл бұрын
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.
@bonnielariviere63704 жыл бұрын
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.
@tigersharkzh7 жыл бұрын
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.
@AgentJayZ13 жыл бұрын
@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.
@freeman33204 жыл бұрын
This is truly the most fascinating video on the web.
@tt3233 Жыл бұрын
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
@sarahivsutterb7474 жыл бұрын
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 🙋💖😍✈️👍
@Helicopterpilot1613 жыл бұрын
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.
@irwins7910 ай бұрын
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.
@AgentJayZ10 ай бұрын
Please note it was not me you had to watch. It's not a movie, and I do not direct the actions of others. Thanks.
@Ray-xv7rh2 ай бұрын
Worked on Rolls Wood group.. High standard... and I know exactly what you are saying. We do our best tho..
@Dillybar7779 күн бұрын
Yeah, these guys aren't very bright. You can tell
@deljeenomar7893 жыл бұрын
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
@pantherplatform5 жыл бұрын
This channel rules! This is what I really want to see, not just compilations of the same recycled videos.
@Jangle20079 жыл бұрын
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.
@AgentJayZ9 жыл бұрын
Now that is a question I don't really know the answer to. I would not be surprised if their was that much variability engineered into the production technique. But I don't know.
@Jangle20079 жыл бұрын
AgentJayZ Thanks. I couldn't even begin to guess. I'd be very interested in hearing the thoughts from others. Grahamj9101?
@sgtjonmcc7 жыл бұрын
I would have to guess the 3-4% variability would come from the composition of the materials, depending on manufacturing techniques. the blades generally a made from a single ingot of metal, titanium and/or nickle tin alloys, these you say have a ceramic coating, which could also effect the weight, but specific impurities and imperfections on the alloy compositions could also explain the variance. It is most likely a combination of all three.
@dave38x7 жыл бұрын
It's mostly to do with dimensional variation on the casting of the blades (not sure if these are cast, but similar story for wrought blades too). The alloy composition tends to be very strictly controlled, as does the mass of coatings. For a lost wax casting process you've got variation in wax pattern size, ceramic core size (though these look like solid blades) and ceramic shell size, all of which contribute to a varying size for the final casting. As Jangle points out, the difference does not affect the blade integrity :)
@autotalon7 жыл бұрын
I wonder why they wouldnt just have a spot for balancing on the base or something then. Or if it's the blade itself's weight that's more critical?
@dixonpeter7 жыл бұрын
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!
@REVIVAL-zq6mb3 жыл бұрын
Cool to think they were stored since a year before my father was born.. thanks for the video👍
@AgentJayZ11 жыл бұрын
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
@tanmaynagpals2 жыл бұрын
It looks like thermal barrier coating based on zirconia
@free_spirit111 жыл бұрын
sliding the blades back in looks like such a satisfying thing!!
@user-yv3dx7os9q4 жыл бұрын
I don’t know why I feel comfortable and relaxed watching this😊
@AgentJayZ13 жыл бұрын
@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.
@enzochoi9233 жыл бұрын
I love how informational this is!
@Yaivenov11 жыл бұрын
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.
@AgentJayZ13 жыл бұрын
@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.
@galileohumphreys4667 жыл бұрын
Excellent soundtrack for the assembly video
@blthetube14 жыл бұрын
It's a thing of beauty to see a well made machine.
@aliyardimoglu56297 жыл бұрын
..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....
@Biankowska5 жыл бұрын
Beautiful. I’m dreaming about that job 😍
@srgofcb12 жыл бұрын
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.
@AgentJayZ13 жыл бұрын
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.
@brabhamfreaman1663 жыл бұрын
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.
@blthetube19623 жыл бұрын
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.
@AgentJayZ3 жыл бұрын
Oh, we have some pretty awesome gearhead girls on the team.
@blthetube19623 жыл бұрын
@@AgentJayZ You're right.... I guess I gotta throw my two cents in because men never hear the end how we are holding women back. Great Video's ... glad you take to the time...
@AgentJayZ12 жыл бұрын
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.
@jimmysparks3154 жыл бұрын
i could watch this stuff all day....
@bryanhead26705 жыл бұрын
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!!
@AgentJayZ12 жыл бұрын
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.
@AgentJayZ12 жыл бұрын
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.
@jamesbarratt5936 жыл бұрын
Now I know how the blades fit into the main disk. Awesome. I am going to subscribe. Can’t wait for more video’s.
@AgentJayZ12 жыл бұрын
This question is answered below. It gets asked a lot. You guys are very curious !
@Mr.1.i3 ай бұрын
That was naughty banging 2 blades together
@Cainula Жыл бұрын
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.
@AgentJayZ Жыл бұрын
The high nickel alloy is quite heavy, and each blade is cast with a single use mould. There is no area on the blade where material van be removed to adjust the weight.
@19LG99 Жыл бұрын
sounds like a great field of research: Making a blade that is adjustable after being cast
@NavinF Жыл бұрын
@@AgentJayZ Can't you drill a little 1mm diameter hole into the face that's facing you when you insert the blades at 2:44? (I mean hypothetically. I know you can't ignore the repair manual IRL)
@user-zs9nt6ns9y11 ай бұрын
В 46. Году. Слесарь ..КОВАЛЕВИЧ за 4 месяца. Вручную сделал. 52. Лопатки на турбину. Разница в весе составила. Миллиграмы. Ну о размерах и говорить нечего....
@cosmos6806 жыл бұрын
That was one of the best videos I ever saw explaining how this thing really works! Thanks!
@caturskak69364 жыл бұрын
ohhh...gosh, that was my dream job, touching handling such a beautiful finest engineering product
@AgentJayZ10 жыл бұрын
Don't know for sure... but I would guess it is just the way things go in production.
@pzgrenadier4411 жыл бұрын
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
@hellonepal16414 жыл бұрын
Nice video..i m happy that i used to repair those blades...hpc and lpt..Airfoil..
@capitanvonchickenpants84924 жыл бұрын
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
@AgentJayZ4 жыл бұрын
The computer gives a good starting point. The final balance is achieved by using the balance machine and making very small adjustments.
@AgentJayZ11 жыл бұрын
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 !
@nahidbepari54594 жыл бұрын
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.
@AgentJayZ13 жыл бұрын
@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...
@AgentJayZ13 жыл бұрын
@FrontSideBus yes, it was the nozzle we opened first...
@humungous094 жыл бұрын
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.
@halfabee5 жыл бұрын
Originally created in the Admiralty Materials laboratory in Holton Heath Dorset. Also where the space shuttle tiles were developed.
@douro2012 жыл бұрын
Chromalloy has a joint-venture in Middletown, NY which is one of the largest operations of its type for surface treatment of turbine blades...
@sreetips6 жыл бұрын
I'm looking for a turbine blade that contains platinum. Are they available for purchase? Thank you.
@basavarajbh58693 жыл бұрын
Thank you for putting this things in internet super sir
@AgentJayZ11 жыл бұрын
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.
@Skyshade6 жыл бұрын
Actually, these were called buckets back then, as they were designed by steam turbine engineers. s3.amazonaws.com/dsg.files.app.content.prod/gereports/wp-content/uploads/2015/08/11203510/tumblr_inline_nsxs3jaQ031qzgziy_540.jpg
@AgentJayZ13 жыл бұрын
@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.
@AgentJayZ12 жыл бұрын
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.
@AgentJayZ12 жыл бұрын
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.
@mightyfinejonboy13 жыл бұрын
made me cringe, watching those blades been tapped together !!
@creamshop4 жыл бұрын
my first thought was (what an as***e)
@rileyjordan90724 жыл бұрын
probably the same guy sweeping the dust under the equipment.
@mackebest19957 жыл бұрын
love how that guy cleaning the floor is just pushing it under the step ladder thing
@searchthetruth19814 жыл бұрын
Geezz this is awesome man....i like you re vids .....i like them a lot....very informative....keep up the good work!!!
@gavincurtis10 жыл бұрын
Dare I ask what that set of new old stock blades cost before the ceramic treatment? After the ceramic treatment? Awesome work! :)
@provetamin4 жыл бұрын
i buy that for a dollar!
@MrLrry12665 жыл бұрын
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.
@AgentJayZ5 жыл бұрын
The turbine blades have a ceramic thermal barrier coating. The function is in the name.
@JAMESWUERTELE6 ай бұрын
Those are just beautiful
@jaxv947 жыл бұрын
"should i drop it on the floor?" lol
@fkot7 жыл бұрын
Hey man, great work!! You really improve my theoreticall skills before making my attempt to ATPL theory exams :) Thanks.
@campanaro_992 жыл бұрын
I like how he tapped them together to make themvring.
@cmay8784 жыл бұрын
I wish I had become an aircraft mechanic! Instead I went into health care.
@AgentJayZ4 жыл бұрын
I was in health care, but decided I worked better with machines than with people. Happier now.
@cmay8784 жыл бұрын
@@AgentJayZ at 54, I don't know if entering a new field would be viable
@AgentJayZ4 жыл бұрын
Never underestimate the power of aptitude, enthusiasm, and determination.
@gregorygardner4431 Жыл бұрын
I did, and it did me no good.
@rickey535313 жыл бұрын
JayZ. When you say ceramic blades, /do you mean metallic blade with a ceramic coating? Wow! and from 1953? Incredible!
@rickstav90244 ай бұрын
Thanks. Its hard to get a get a look at that end.
@OzzieWozzieOriginal5 жыл бұрын
the ceramic can witstand heat but isnt it BRITTLE??
@RedDaLord8 жыл бұрын
watching this is extremely satisfying
@ArtisanIndustry Жыл бұрын
thanks for introduction,very nice!
@rapaelisaya81944 жыл бұрын
I appreciate your work great minds
@dilbert55 Жыл бұрын
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
@AgentJayZ Жыл бұрын
You are not making any sense.
@stewartdaniel69334 жыл бұрын
Old video but good work jay
@GeorgeFriend794 жыл бұрын
it was a good soundtrack. very nice
@loluspololus5 жыл бұрын
blades in place , and engine is redy for turbo boost , nice video ,,,,!!!!
@aqcd12 жыл бұрын
ive had the luck to be shown and taught the process to apply the TBC.
@user-zi8jn1go8k9 жыл бұрын
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?
@AgentJayZ9 жыл бұрын
Have a look at a short video I made about your question, called Jet Engine Turbine Blade Noise... Or something like that.
@RobertoCloon Жыл бұрын
Satisfactory video
@AgentJayZ Жыл бұрын
Adequate comment.
@eric49465 жыл бұрын
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
@AgentJayZ Жыл бұрын
You do not understand how the blades are cooled, so you don't see a point in a TBC. Don't you give me orders, buddy. Read the freaking description.
@eric4946 Жыл бұрын
@@AgentJayZ I have proper modern blades sitting on my desk and a basic book on transport phenomena but never try to argue with “experience” on 70 YO tech I guess. My literally job is thermal testing these coatings and matls. I get you’re a tech working on these all day and read plenty of literature but I sit and stare at thermal models for how to cool these things what sort of heat transfer they have etc. Nickel has incredibly bad heat transfer. The YSZ does reflect some IR and provides oxidation protection but if you’re not pumping air up the core last half of the blade barely knows the disc is there holding it from a heat transfer perspective so this blade isn’t “cooled” unless I sorely missed some sort of passages on them. Reflecting IR doesn’t provide cooling. It only reduces heat transfer.
@chadxinc11 жыл бұрын
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.
@AgentJayZ Жыл бұрын
Dovetails look like dove tails, and they are used on some compressor blades. Firtrees look like Fir trees, and are almost always used on turbine blades, because they are a stronger joint. I am surprised you don't know that they are two different things.
@isactucker37885 жыл бұрын
cool stuff. Balancing is a pain. When you are new.
@devilsoffspring55197 жыл бұрын
1:26 Just curious, why is the guy tapping the blades together? Aren't you supposed to ever-so-carefully avoid such things?
@AgentJayZ7 жыл бұрын
To demonstrate how durable the ceramic coating really is, and to emphasize that the answer to your second question is no.
@devilsoffspring55197 жыл бұрын
OK, just wondering. I'm used to thinking of ceramics as very hard and brittle, although I admittedly don't know much of anything about them... Is it aluminum oxide?
@gordonfreeman19154 жыл бұрын
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?😂
@Jakeyboyshow13 жыл бұрын
BEAUTIFUL! Engineering at it's best!!
@sparkymax42905 жыл бұрын
Just when I thought I had some cool projects going on in my shop.
@nirfeintuch5 жыл бұрын
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 ?
@mohammadzakir59244 жыл бұрын
I like your work
@brianmoore54985 жыл бұрын
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 ?
@shivpalpatine7 жыл бұрын
so they were made in 1953 and never used? Or made recently and modeled after the ones in 1953?
@AgentJayZ7 жыл бұрын
New old stock, made in 1953 and stored for decades.
@fagungfan5 жыл бұрын
AgentJayZ, So they had already used ceramic coating in 1953?
@brk9325 жыл бұрын
@@fagungfan No they were coated after they were unpacked from original packaging
@mohanperformance.enginerd.1308 Жыл бұрын
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! 😳
@AgentJayZ Жыл бұрын
I had the same reaction. The man has many years of experience with these coated blades, so I trust his knowledge. In all the years since this video was made, and with all the engines I have built using blades with this same coating, I have never smacked them together like this.
@mohanperformance.enginerd.1308 Жыл бұрын
@@AgentJayZ I should add. I have no doubt the man knows exactly whats going on and is an expert in ceramic blades. That goes without saying. But for me. I have an underlying instinct if you will. To never chance traumatizing a highly engineered component. No matter how low the risk is. I would not tap a connecting rod on the side of a table before installing it in a formula 1 engine just like I wouldnt kink an elevator cable that was going to be put into service. Not because of any increased risk of failure so much as it is fundimetally wrong in practice and no matter how miniscule any potential risk exists. There is always some risk. We can't see all forms of stresses imparted. Atleast thats my opinion. But I meen no disrespect. The guy no doubt is super super knowledgable.
@ricktbdgc Жыл бұрын
Yea i cringed
@snorttroll43797 ай бұрын
@@mohanperformance.enginerd.1308 yeah. well. an x ray is in order
@wraith39514 жыл бұрын
I can honestly say, i dont miss removing Service Run Blades on a Siemens G Machine AT ALL! Especially Row 16😑😫
@mark-12348 жыл бұрын
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?
@AgentJayZ8 жыл бұрын
+Mark - The turbine was removed from the engine, then de-bladed. The blades were sent out for TBC coating. The turbine disk was carefully cleaned for at least a day. When the blades returned, they were weighed, and the weight printed on them. The blades were sorted to provide a reasonably even distribution of their weights. The turbine was placed on the balance machine. The blades were installed without locks. The assembly was balanced by moving blades around, and the positions of the blades was recorded 1-2-3 in the disk locations 1-2-3. The blades were removed and placed in storage. The engine was then reassembled in the vertical position to facilitate alignment of the turbine shaft with its bearings and the connection to the compressor. The engine was then placed in the horizontal position, the blades reinstalled in their recorded position ( this video), and locked into place. All this is necessary because the turbine can't be balanced while it is in the engine, and it's easier to install the turbine when the blades are not in it.
@mark-12348 жыл бұрын
AgentJayZ Now that I understand the sequence, makes sense. Thanks for the explanation -- and for all the videos. I worked on round motors; never got to the turbines, so it's nice to see the work.