Compressor Rotor II - Turbine Engines: A Closer Look

[D1rtyraver]

So if Wikipedia is not accurate enough for you, maybe you should contribute? You seem like exactly the right kind of knowledgeable guy to make a correction to the widely-used public information resource.

[pablof59]

@ 3:50 Zildjian sound !!

[ICESPACEMANGALAXY]

@ICESTRONG@ "I just finished 2 years of aviation mechanic schoo training as an Aviation Maintenance Technicain & I love your demonstrations." "I have watched some videos & has helped me understand a great deal, thank you." "The school I went to is called (AIM) Aviation Institute of Maintenance in Duluth, Ga."

[wow1022]

you can correct wikipedia yourself youknow

[rickey5353]

Fascinating channel. Informative and entertaining. Thanks for revealing the mysteries of turbine engines.

[happy543210]

What a beautiful, harmonious piece of human ingenuity...which can easily be turned into worthless crap by a stray duck or goose!

[mmarchmonte88]

why would the 1st stage be in the middle of the rotor, its not like that on my F404-GE-400/402

[AgentJayZ]

@mmarchmonte88 The first stage is at the front of the compressor rotor. Some industrial engines have had additional stages added to the front of the compressor, and they are called "stage 0" and in front of that, "stage 00".

The LM1500 has not had that modification, so the stage 1 disc is the first stage of compression.

[kinsley2108]

@mmarchmonte88 I think the way you were looking at it. It looked like the first stage was in the middle because the whole assembly was sitting on top of a stand that looked like more compressor discs but it was not part of the assembly.

[AgentJayZ]

@kinsley2108 I never realized that might be what it looks like. You get so used to the parts, you don't realize how strange they may look to those who don't handle them every day.

[kinsley2108]

@AgentJayZ Yeah, well I figured that looks very expensive so you wouldn't want it sitting directly on the floor, lol.

[usamabarakat]

when you remove the blades do you store them and then they are reused? or do you throw them out?

[AgentJayZ]

@usamabarakat We keep the servicable blades, and repair any that need a little touch-up. If they are damaged beyond servicability, we recycle them, as they are made of high quality alloy steel, or in other engines: titanium alloy.

[pmgodfrey]

Thanks, AgentJayz, I learned a lot!

[killman369547]

if that anti rotationb broke off in flight what is the potential that the engine would be damaged

[AgentJayZ]

@killman369547 It's inside the compressor rotor and can't get out into the gas path, but it could bounce around causing a lot of minor damage. Each time the engine was shut down or started up, the piece would end up in a different place, always affecting the balance of the rotor. This would increase the vibration of the engine in operation, and cause additional stress on the main rotor bearings.Failure of the bearings would be unlikely, but they might experience accelerated wear.

[killman369547]

@AgentJayZ ok thnx sry for the bad spelling my firefox is messing it up

[santhosh11dec]

hello agent jayz, i ve seen many of your videos and they are really cool !!! And i m eager to know one thing.... whats your profession ??? is this your hobby or your profession ??

[dudeforsure1]

lets switch jobs but i still dont have one thought

[AgentJayZ]

@dudeforsure1 Deal!!!

[AgentJayZ]

@AgentJayZ Oh, uhhhh, that was my first, instant reaction... let me think about this for a few, and then I'll get back to you for real, OK?

[dudeforsure1]

@AgentJayZ cool when i pass college

[LarryCanFly]

Jay, thank you so much. This vid answers questions I've had for years! I have a couple of those discs and wondered about that. Ah ha! Torque cone!

[WolfenGeist]

WOW man! you're so freaking lucky to have those compressor rotors! i'll kill for have 1 chance for buy some complete rotors!

I'm a collector of jet engine parts,unfortunately living on the wrong country <.<

[AgentJayZ]

@WolfenGeist We still have some junk left, for shipping only plus a small donation. What do you want?

[WolfenGeist]

@AgentJayZ

interesting! i'll reply you by PM :-)

[Flatline89]

Wouldn't it be very difficult to machine/shape stainless steel into those blades?

[AgentJayZ]

@Flatline89 yes, it is difficult and expensive.

[Flatline89]

Would they machine those stainless steel blades? Must be a very difficult task...wouldn't it?

[outspwq28]

wow those blades are so easy to take off...what holds them in place? wouldn't they just fly off in a running engine?

thx again for your vids.

[AgentJayZ]

@outspwq28 When the rotor is assembled, the spacers overlap the blade slots in each disc, preventing the blades from moving out.

[outspwq28]

Very informative...Thanks for sharing!

[ASSEMblerEX]

How much are unusable titanium discs worth for scrap? I'd love to get one to

put on my wall. Beautiful thing, titanium.

[AgentJayZ]

@ASSEMblerEX The actual material is not worth as much as you think.

BUT.. to get to the forward stages, the entire rotor must be disassembled.

There is no shortcut, even with a plasma cutter.

I have tried... no go.

So, it takes about 4 or five full days of work to get to the titanium.

Come on up for a visit, we'll put you on your own rotor and show you what to do...

[mman454]

Wikipedia articles are written by users not their staff.

[hootergirlsrhot]

when was Wikipedia ever right

[jdmk20aek]

AgentJayZ your AWESOME !!! im going to be buying "the Jet Engine" by Rolls Royce soon !!! i cant wait to crack that book open !

[AgentJayZ]

@jdmk20aek I do believe you will love that book. It's very inspiring, but also full of great information. It will answer all of your questions, and make you come up with ten times more.

[bonecrime]

You know that the info on Wikipedia is written by the users, right? ;-) You can probably change the info yourself.

[AgentJayZ]

@bonecrime yes, I need to find suitable "proof", like a quote from the GE J79 manual.

[bonecrime]

@AgentJayZ How many of these engines have you worked on? I'd say that's proof enough!

[AgentJayZ]

@bonecrime Yeah, this is the fourth J79 rotor I've taken apart in the last few months. I've built one up. Plus I've had to become very familiar with the parts book and the different versions of the engine.

And I've worked on the assembly of dozens of LM1500s, which have the exact same rotor as the J79.

But I need to find a quote, since for now... " because AgentJayZ says so" is not a good enough reference.

[bonecrime]

@AgentJayZ Wouldn't the parts book be a good reference?

[1metiz]

That's some expensive "junk" you've got lying around! very informative and entertaining!

[Xx69roadrunnerxX]

Excellent vid!! Amazing stuff! Man, if only I had a day to poke around your shop and check out all the awesome stuff. Well, that kinda what im doing now :)! Thanks!

I wish my truck used aviation grade metals so it was all rusty. That Titanium sounded amazing.

I cant wait to hear the F/A-18C Hornets turbine engines roar at the Thunder Over Michigan air show soon!!