30,000 Hp GE Turbine engine

[mobius1aic]

Who's here because of the Air Cooled Blades vid? :D

[snorbinmop7]

GE...We bring good things to life!

[AgentJayZ]

@snorbinmop7 ...Actually, this time it was S&S Turbines who brought this thing to life.

[LarryCanFly]

@AgentJayZ You mean "back to life".

[TheNvizzle]

I'm pretty sure I started this adventure by watching a video about a VW. I just keep clicking links that list more horsepower :/

[dirtnasty81]

Ah yes. I use to work on the lm2500. Gsm2

[TriniRam74]

I'm gonna buy my wife this for Christmas!

[M1CH0]

to think it only uses a tank of propane to power up

[AgentJayZ]

@M1CH0 Yes; out of view is a 2,000 gallon tank of liquid propane. Good for about 15 minutes at full power...

[rlee0001]

@AgentJayZ Have you ever seen an engine catastrophically fail during a test? How violent would a failure be? Are these tests considered dangerous?

[AgentJayZ]

@rlee0001

1) No

2) The worst that could happen is a turbine disk failure. Extremely rare but there are documented cases.

3) No

[xxBlackpspxx]

how you guys testin this is there like a giant dyno lol

[killman369547]

@xxBlackpspxx there are different sensors inside the engine that measure rpm's egt 9exhaust gas temperature and oil pressure

[dragstar7039]

What does this turbine burn per hour 500+ gallons?

[AgentJayZ]

@dragstar7039 We don't measure fuel consumption, because for our customers in the oil&gas industry, it's not important.

But this engine would use roughly 40 gallons per minute if it used that kind of fuel. It burns natural gas in service and we test it on propane.

So IF you had one and were burning kerosene, diesel or gasoline... it would use an estimated 2400 - 3000 gph.

... A lot!

[iwantpk2]

More like 500,000 GE-115b engines will move the Earth.

[cautionfiamable]

@iwantpk2 nope

[xXCREEKSTARXx]

i want marshmallows there XD

[mrskyking737]

@AgentJayZ, Sorry man, he can't. My Dad's deceased as of the early 2000's. I would love to hear more of those stories myself. :-(

[AgentJayZ]

@Orca40 OK, better yet, can you send me the PDF manual?

much more convenient than these giant binders...

[AgentJayZ]

@Orca40 Propane is a very clean-burning fuel. Natural gas ( methane ) is cleaner, and hydrogen is the best of all.

Kerosene or diesel make good power, but are dirty, leaving a trace of black smoke in the exhaust.

The test in this video was fuelled by propane.

[AgentJayZ]

@Orca40 Axial loads are thrust loads. There is no "balance piston" in the LM2500.

There is one at the front of the compressor of the RB211 industrial.

[The2000redrocket]

gelm2500 roller roller ballroller roller ball roller. is that still the shaft bearing layout? with a power turbin aft of the gas generator section? worked on them on my navy ship. we junked up two after 10,000 hours on the clock. starbord bird had a inletguidevane clip come off or a blade brake.

the other i was boreoscoping and found tip clang on 4th stage blades and we had to change out the compresser blades and re blance.

[bxghostfacekila]

dude that noise hurt my ears wtf!!

[josephtan1818]

I suggest that gas turbine+steam turbine will be ideal, steam is then supplied by heat recovery boiler which is installed into the exhaust of gas turbine. this is how millennium class cruise ship using its pair of gas turbine to drive its steam turbine which drive the 3rd generator( 1&2 generator are driven by gas turbine)

[guillaumefg]

Where's the flux capacitor?

[shawnster44]

1 million of these lined up together might speed up/slow down Earth's rotation.

[mzn33co]

nice

[cautionfiamable]

@shawnster44 haha umm no, not even 100 trillion of these could do that

[staytruestayfit]

@shawnster44 dude id say 10,000 or maybe 30,000 could move the earth a lil faster

[Ugleskjegg]

@staytruestayfit Slow it down if anything :P

[XTYNoLuck]

@shawnster44 no it won't...

[VCRAGE]

@shawnster44 Lol, we're insignificant to the powers of astrophysics, the numbers you'd see are beyond comprehension, even to alter our "little" planet's momentum xD

[bigbobgotu]

@shawnster44 its soulds like it would bet in real life it could not because when its pushing out the air say to the left the frame thats holding it up is pushing to the right with the same force. its like useing a fan on a sail boat to move it

[AgentJayZ]

@bigbobgotu He knows that. He was joking. Or having some fun. It's good to have fun. OK?

[bigepi]

@bigbobgotu at first yes then no and still now i'm not sure. I thought of it 2D like.. earth as a solid disk floating in a bed of water(air)< all of that floating in another giant plate(earth and air) and that floating in a frictionless pool of water(space) if the center disk starting spinning up it would eventually carry it over to the outer plate. <But that's not a true example of the forces hehe

[bigepi]

@bigepi the saidboat affect that is.

[shawnster44]

@bigbobgotu fan + sailboat experiment youtube.com/watch?v=0CrXvOKPym­k

[navyone1978]

Are you hiring??

Got experience with the LM2500, Allison k-17, k-34, textron TF40 B, and 9140 engines..

im getting outta the navy in about 7 months.

[enginecontrol32]

make that into a motorcycle please! lol!

if I had a turbine, running or not, I would have to take it a part, and have parts melted to make a V-8 out of hell.

[navyone1978]

@enginecontrol32

Well, at about 1200-1500 gal per hour at 80% throttle, you might need to tow your own gas tanker truckLOL

[enginecontrol32]

@navyone1978 lmao, a motorcycle towing a tanker hahaha. I really wish I didn't say anything about melting parts into an engine...now I really really want to see what it can do lol, like cubic inches in the thousands! huge freakn' pistons etc.

[ferrellw]

What would a handful of quarters do to that thing?

[AgentJayZ]

Wreck it if it was running.

That's the kind of question that someone might notice and put you on some sort of list...

[OTULP62]

turn the engine into a hand full of quarters, you stay away from my plane.

[Reverseflush]

I would not stand so close as that machine can suck a human being within. Its a high speed meat grinder. Throw a bag of baseballs into it and see what happens!

[Sukinsyn127]

Zjebane beznadzijne

[sketnomore]

Now this lil' turbine should be placed right on top my Evo xD

I'm trying to imagine, by my imagination won't just keep up -_-

[HalfCupOfJoe]

So say a turbine generates 10,000 lbs of thrust. Does that mean that there is a support structure if some kind that the turbine shaft spins on that can handle the axial load as well as the rotational speeds required?

[IronPump89]

I think you only need to handle the axial load. the rotational speeds dont need support I guess...

[AgentJayZ]

Yes, those support structures are the bearing supports in the engine.

They transfer the load or thrust to the external casing of the engine.

Reinforced points of the outer casing are then connected to reinforced mounting points in the airframe of the aircraft, or in our case, to the engine mounts of the industrial application.

In our test cell, those engine mounts are held in place by our green structural steel frame.

[navyone1978]

@AgentJayZ ill give you a cookie if you know what this means.

roller roller ball, roller roller ball roller.. LOL

[AgentJayZ]

@navyone1978 1,2,3,4,5,6,7

radial, radial, thrust, radial, radial, thrust, radial...

Oh, don't make me check the IPC...OK?

[navyone1978]

@AgentJayZ

LOL, good one.. just checking

[evo7kid]

@AgentJayZ

Convergent, divergent, convergent, convergent, divergent, convergent, divergent...

With afterburner :)

[windyrotorblast]

Great stuff you would never get to see anywhere else. Thanks J.

[HUMBOLDTG35DRIVER]

THIS IS AWSOME!

[raynus1]

Ha! Your neighbors in FSJ must love you guys,

[johngettershow]

put that on a 747

[AgentJayZ]

The CF6, which is the aviation engine from which the LM2500 design was derived, was used on some 747s.

[mrskyking737]

My Dad was a GE engineer, and worked on the project which turned the CF6 into the LM2500. It was originally in the 25,000 hp class, and one of the bigger issues was corrosion prevention. They were intended as ship powerplants, and the marine environment isn't nice to metal.

[navyone1978]

@mrskyking737 Well, they have been using them here in the US navy for about 20+ years now, and they seem to hold up pretty good. Now with all the filtering elements we have, almost nothing can get into them, including sea spray and salt..

[AgentJayZ]

@mrskyking737 Would your dad be wanting to talk to a bunch of guys very interested in the history of that particular project?

We work on these things every day.

[Gamidia]

@mrskyking737 You must be proud! I believe it's a difficult ut also exciting job. I hope you followed your father's footsteps :) Take care.

[STCodes]

PUT THAT IN A CAR!

[LOLDISNEYLAND]

is the high pitched sound of a turbine the sound of the individual turbine blades vibrating as they move through air?

[AgentJayZ]

The blades don't really vibrate, but as they pass the stators, they act a bit like a siren.

As each blade covers and uncovers a stator vane, it causes a slight pressure pulse in the air, and this makes sound.

This effect is minimized by making sure that each compressor rotor stage has a different number of blades than its corresponding stator's number of vanes.

[HalfCupOfJoe]

The Wärtsilä RT-flex96C is a two-stroke turbocharged low-speed diesel engine manufactured by the Finnish manufacturer Wärtsilä. It is currently considered the largest reciprocating engine in the world, designed for large container ships, running on heavy fuel oil. It stands at five stories (13.5 metres (44 ft)) high, is 27.3 m (90 ft) long, and weighs over 2300 tonnes in its largest 14-cylinder version — producing 109,000 brake horsepower (81.3 MW).

Wikipedia

[AgentJayZ]

Now that is a big engine.

I was going to ask the weight, but it's there at 2300 tons.

For a big container ship where fuel economy is important, this is a good choice.

But if speed is important, as in a military ship, you can get one hundred thousand Hp from 2 LM 2500s and 2 LM1600s.

Altogether that would weigh about ten tons, or less than one half of one percent of the weight of the RT-flex96C.

Less fuel efficient, though.

[pietruski]

i think it's meant for power plants. not sure.

[kdc43]

Wow. That is as big as my apartment building!!!

I guess I can't install the 109,000 HP engine in my Geo Metro instead of the 1.0 Liter.

[gislemark79]

Parking would be a pain in the ass.

[teslaphysics]

Ah yes! I see.

[teslaphysics]

As far as the LM2500 main propulsion for a Navy ship, the ship can be at full speed, and then stop and reverse movement in one and a half lengths of the ship. How does a rattle box compare?

[AgentJayZ]

I'm sure the same thing could be accomplished with diesel power, but the engine(s) would be so huge and heavy that other components of the ship would have to be omitted, rendering it less effective.

One hundred thousand Hp ( for a medium sized ship) in diesels is a lot of cast iron.

[gislemark79]

try that on a plane LOL

[HalfCupOfJoe]

There's those words power density...cant really beat a turbine at that game...

[AgentJayZ]

Yeah, I should explain the way I'm using that term:

I'm using it to describe the amount of power generated in a given volume of space, as opposed to the more self-evident "power-to-weight" ratio...

Not only are turbines lighter for a given power, but they are much more compact.

One of the "other factors" I mentioned above is the lack of vibration.

That could be another reason cruise ships use LM2500s as opposed to great, thrashing diesels.

[AgentJayZ]

Some airliners use some versions of this engine. The aero engine from which the LM2500 is derived is the GE CF-6 turbofan.

There are many different versions of the CF-6, with thrusts rangine from about 40,000lbs to around 80,000 or so.

Just a rough guess. I could paste in info here from GE's website, but then I encourage you to go there. It's easy to find and full of great stuff.

[jondeak]

is this what airliners use?

[HalfCupOfJoe]

So why is a turbine engine better than say a 14 cyl diesel for industrial apps? Efficiency? Power/cost ratio?

[AgentJayZ]

There are many ways to define efficiency.

So much something for so much of something else.

But the turbine engines we work on all weigh between 1 and 4 tons, and make between 4 and 40 thousand horsepower.

They also can run at full power for 2 to 3 years before needing any service.

They are slghtly less fuel efficient than piston engines.

All depends what your're looking for.

[INeedToLiveLonger]

"They are slghtly less fuel efficient than piston engines." Bullshit - piston engine has 2-4 kg pistons which should be accelerated and deccelarated 800-6000 tomes per second. You need to give energy to increase speed and reverse movement. Pure waste of energy. With jet engine such waste is not existing. So ...... dont tell me that it is less efficient that piston engine.

[AgentJayZ]

In terms of converting fuel to rotating shaft horsepower, a diesel engine is slightly more efficient than a gas turbine.

That's one of the reasons why cargo ships and highway trucks don't use gas turbine engines.

Of course, when power density, outright power output, power to weight ratio, or even time between overhauls and other factors are considered, gas turbines leave rattleboxes in the dust.

That's why aircraft like fighters, airliners and helicopters use gas turbine engines.

[HalfCupOfJoe]

No kidding. It'd be neat to have a dyno cell hooked to a pipeline. Invite all the hot rod buddies!

[HalfCupOfJoe]

I read that on Wikipedia, btw.

[AgentJayZ]

I don't know much about the Olympus 593, which is the afterburning Concorde engine. It was significantly more powerful than the 2022, which is in some of my other videos.

I can tell you that in natural gas pipeline compression, which is a major application of industrial turbine engines, fuel consumption is of little importance to the customer.

The pipeline contains an essentially unlimited fuel supply for the engine.

[HalfCupOfJoe]

Ok agent jayz, i just read the rolls royce(?) engines in Concorde would allow that plane to get an adjusted fuel rating of 17 miles of flight per gallon of fuel used at nominal cruise, something like 1400mph. Really?

[kanejam1]

5000 miles to the gallon

[ShoddyHog]

Suck, squeeze, bang, blow.

Yep, they still make 'em the same way they used to :-)

[codydean10]

big engine powered by little propane bottle

[HalfCupOfJoe]

Ah. So there is no actual attachment to the turbine shaft, the output gas drives another turbine which has a PTO of sorts to do work...cool. Now i know shit i didnt know before!

[AgentJayZ]

That's a very accurate description of exactly how it all works... so you probably knew it already, but you may not have known you knew...

There are many ways of doing things.

Some turboprop engines have the prop driven thru a reduction gearbox by the same shaft that the gas generator spins on ( Garrett TPE 331)

Others have a free power turbine, which is separate from the GG (ie, it's free), and it powers only the prop. ( P&W PT-6)

[originalbrownirish]

sooo is this the gas generator section of cf-6, aka the engine without the fan?

[solarcat1]

JayZ have you heard of Turbine Marine in Florida? They rebuild Lycoming turbines that were used in military and commercial helicopter applications and marinize them for raceboats and pleasureboats. The 1450hp T53-13B and the 1850hp T53-703.

Turbinemarinedotcom

Also go to nor-techboatsdotcom and view the video. That boat has the 703s in it and is running close to 200mph. I think you'll recognize the flag lol. :D

[AgentJayZ]

Excellent stuff.

Those boats are unbelievable.

Today, Aug 20 2009, we just finished installing a 40,000 Hp RR olympus in our test cell.

The engine used in some of the Royal Navy's aircraft carriers.

Tomorrow morning we will be heating air and making noise.

I can't wait, and I will have the camera rolling.

[HalfCupOfJoe]

Now is the HP rating derived from thrust, heat output from the "business end"( sorry dont know the correct term) converted to hp or is it measured from the turbine shaft somehow?

[AgentJayZ]

The way we measure power produced is to add a calibrated orifice, or jetpipe outlet to the back of the engine.

What would normally be a straight duct to the power turbine is replaced with a slight restriction to the gas flow.

We measure the increase in pressure caused by this restriction.

Using some equations, we calculate the power that would be produced if the exhaust gases were to drive a power turbine (a separate piece of equipment).

[toribasher123]

what are those wight smoke going out

[AgentJayZ]

As explained in the info section, that is liquid propane being flushed from the fuel line before it is connected to the engine's fuel manifold.

[HalfCupOfJoe]

Thirty thousand hp.. Thats 22,380,000 watts.. that'd be a mighty bright light bulb...

[DAVESTEGEMANN]

i'd like to have this thing on my scooter.

[AFitz1174]

Batmobile Jet x 12?

[stuntrider15]

i can't put straight up kerosene in my car tho, i can however put C16 or Q16 in it and it would run fine even better than pump because of the 116 octane rating

[CryoVenom]

Just remember that octane rating is based on the RESISTANCE of detonation and it doesn't necessarily mean you will get more power

[Pretty727Boii]

holy shit thats mad dough, ho r u video taping this, do u own 1 or sumthin?

[Pretty727Boii]

about how much do u think one of these jet engines costs????

[AgentJayZ]

One of these? A new LM2500 from GE will run you several million US. More if you want it installed.

Used, depends on condition, but probably a million at least.

Older engines, which are in most of my videos, are much less.

They are all 15 to 20 thousand Hp, if that'll get you by...

[RXHardstyle]

*sniff sniff* i smell a PLanefag (Scythian7)

[Liam993cc]

or hes an aircraft technician?

[RXHardstyle]

lool chill chill i was only messing. im like that with cars and if im a carfag then fine thats cool

[AgentJayZ]

All well and good.

This is not a turboshaft engine.

This is not a turbofan engine.

This is an LM2500 industrial gas generator.

There's a lot of good info about it on the GE website.

[AgentJayZ]

since you seem to know a bit about the engines, I will point out that this is an industrial LM2500, rated by GE at over 34,000 shaft horsepower.

Technically it would be a turbojet if it had a nozzle.

It is connected in service to a power turbine which converts the exhaust gas energy into torque on a turning shaft.

If it had a nozzle to accelerate the exhaust gases to produce thrust... then it would be a jet engine.

[Scythian7]

You mean 30,000 Compressor HP right? Because you cannot get Thrust Horsepower from Gross Static Thrust. That Turbojet needs to be on an aircraft flying at a certain speed to get Net Thrust. Then from Net Thrust you can get the Thrust Horsepower. If you know the temperature of the air at the compressor intake and at the compressor discharge in difference, then you can calculate Compressor HP using the Formula: [(Temp Rise) x (0.24) x (Mass Airflow in Lbs/Sec) x (778)] / [550]. - FAA A&P -

[scurvy182]

These are General Electric Turbines they are fitted on our navy frigates roughly 33,000 horsepower it is the same as the 747 without the big fans you see from the exterior of the aircraft this engine, actually produces about 90,000 horsepower but 60,000 is used to keep it self sustaining

[TheGuyOnDownStreet]

who built those engines?

[Kotze07]

that actualy twice as much horses than the queen mary should have. imagine the queen mary with about onehoundred of these thingys xD. would enjoy that travel

[pablo89212009]

30000 HDP

[GreeceBmWw]

i have the same to my car :)

[spartain96]

what does it go on an airplane? imagen it on a car lmao

[2tallbrandon]

read the description kid...

[drz400e332]

People have put things like this in cars, at least people looking for wicked fast quarter mile times and the resources naturally.

[AgentJayZ]

"these things" meaning turbine engines have been put in land racing vehicles.

But there has never been an LM2500 or the CF-6 it is derived from ... never been put in a car or truck or tractor.

Just too big.

LM2500s are used to power cruise ships.

[west466]

spali na blokatoooor mona  :)

[Cs16Freak]

ultrasonic range

[xoio]

Hi, you say in the description that this engine in it's aviation form powerd the DC10 & 747 --

Obviously it looks a tad different here - Did the industrial version NOT have the High bypass Fan on the front then?

[AgentJayZ]

Correct. The LM2500 is mostly a CF-6 with the entire LP system removed.

The fan is gone, and so is the turbine that powers it, as well as the shaft connecting the two.

The power turbine used in industrial applications is a separate piece of equipment and is driven by the exhaust gases from the 2500 via short duct.

[dustystix76]

these are what power most of US Navy Ships..Destroyers, Cruisers, and Frigates

[Bigjohnnywad]

What is the fuel consumption?

[AgentJayZ]

We fuel the engine on propane heated in a vaporizer to it's gaseous state.

This test was about a half hour long, and we burned about 2500L of liquid propane.

A test involves a fair bit of starting, idling, and sub-max power running.

At the beginning, you see liquid propane being purged from the fuel line before we connect it to the engine.

[6reevesy9]

Holy crap. That's like $4800 right? Because it'd roughly be £2500 in my country.

[AgentJayZ]

We pay about 60cents a litre for liquid propane. It's about 2/3 the price of gasoline here.

Some of our tests use up all of the tank, which is about 5500L

[6reevesy9]

Damn, still expencive, who pays for it?

[AgentJayZ]

The fuel is included in the price of an engine test.

When this engine is installed, and used to turn an electrical generator, it will be using about 10,000L of liquid propane, or the equivalent in natural gas... every hour. For months or years between shutdowns.

[scurvy182]

when running ours on diesel we can burn up to six cubic tons an hour al full power so thats 6000L an hour

[Dang911]

I work at GE and a lot with the LM 6,000 and would just like to clear some things up. The Land/Marine engines are aero derived engines meaning modified airplane engines s but the LM engine is very different in how it uses its thrust. All engines airplane or industrial can be rated in HP but its more common for airplanes engines to have a lbs rating. And for the person saying a turbine is more like a jet than IC engine, I'll let you just think about that one. Suck squeeze bang blow.

[Ntalikeris666]

how far do you have to stand (in front of it) when it is full throttle and not be sucked ?

[dms654]

mrskinnyboy; Um.........no. Never seen a C130 Herc engine rated in Lb Thrust now have you?, Or Dash-8, Or Lockheed Electra, or...........

[mrwideboy]

I don't know where the 30,000 Hp comes from as ALL gas turbines give their output in pounds or kilo's of thrust as they are more like a rocket rather than internal combustion engine.

[AgentJayZ]

You sound pretty emphatic and instructional there when you tell me All gas turbines give their output in thrust.

Partly true, but this engine gets connected to a power turbine, which turns the thrust produced by the "core" into 66,000 ft-lbs of torque turning a massive shaft.

If you multiply torque by RPM and divide by 5250, you get horsepower.

A little grade 9 algebra, and I bet you could figure out what rpm the LM2500 power turbine is designed to run at, eh?

[AgentJayZ]

The GEAE industrial and marine page will tell you shaft horsepower ratings of all their engines.

The Data plate on an LM2500+ we had in the shop said nominal horsepower was 34,800.

Hope this helps.

[navyone1978]

Oh, and are you going to be hiring in about 2 years?? :)

[AgentJayZ]

I can not see the future.

I don't do the hiring.

S&S Turbines

and

Maddex Turbines

are both successful businesses.

Industrial gas turbine overhaul experience is fairly rare.

Ft St John is a small but dynamic town.

You are only limited by your imagination.

[navyone1978]

Actually, the question about hiring was made partially in jest.... But, i love working the gas turbine field in the navy. So far, I've worked with and on the GE LM2500 GTE, Allison/Rolls Royce 501 k17, and k34 GTG, textron TF40-B, Rimms, and a couple others... And experience in operation and repair of all the above has taught me a LOT... Mainly that most problems with these are FOD ingestion, and electronic control issues.... or overtemp/ overspeed conditions...

[navyone1978]

oh, and did you ever experience total loss of bearing oil pressure on a running turbine?? NOT pretty when auto shutdowns are disabled....

[AgentJayZ]

We don't see a lot of over temp, over speed type problems.

But being industrial powerplants, we deal with things that have been run hard for a long, long time.

Most FOD dmage we see is caused by dust over long service intervals.

Althought there was the piece of plywood that went through a certain engine...

We repaired it and it tested just fine.

I can't identify it, but we did video the test, and it's one of my uploads.

[navyone1978]

i imagin in the industrial/ power generation field, most of the turbines run at a steady state/ constant RPM condition. Less stress on the turbines. Our main propulsion turbines, are constantly variable RPM, and the generators are frequently cycled on and off, based on load. VERY hard on turbines for constant start and stop when tthey were designed for long term steady state running...

[navyone1978]

I guess thats why we have issues.....

[navyone1978]

what i meant to say, is thats why we see stress fractures during borescope inspections, and other maintenance/reliability issues.. also saltwater/ extreme temp enviornments are hard on them too

[killman369547]

did u post a vid about that one cos i want to see it

[AgentJayZ]

Sounds like you have an interesting time working with a variety of different engines.

In the year and a half since I moved up here to "Jet City", I've worked on RR Avon, RR Spey, RR Olympus, Orenda OTF-3, GE LM1500, LM2500, J79, RR Allison 501, and the little Garrett JFS-100.

I sure am glad I never got that job assembling new engines for a certain manufacturer, who will not be identified!

[navyone1978]

The LM2500 used on US navy ships does in fact have a 6 stage LP turbine, to drive a powertrain attached to a reduction gear, attached to the shafting, attached to the ships propellers... pretty cool to look at, if you ask me.

[CivSi02]

So let me get this right...im an EOCN (seabees) :) but always wondered about the GS field, are you a GSM or GSE? And also, the LM2500 is essentially a CF6 correct? So would that make it a "turbofan"? Would it sound the same way at full power? Sorry so many questions, thanks!!

[navyone1978]

I'm a GSM, first of all, and yes its essentially the same, with a couple differences.

Does not have the "turbofan" first stages of the compressor section.. (the really big blades on front).

Has a power turbine section bolted to the back, (6 stage turbine after the HP turbine).

This is in shipboard applications.. power gen. applications might be a little different..

[CivSi02]

Awesome, thanks shipmate :)

[AgentJayZ]

We have a LM2500 in the shop that is used for electrical power generation.

We also have the 6-stage power turbine sitting here.

It's probably even the same part.

[navyone1978]

it probably is... they are pretty standard no matter what the application...

[schaapzak]

Its a gas generator! thats all!

[AgentJayZ]

Exactly.

[AgentJayZ]

The LM2500 is drived from the CF-6, an airliner turbofan engine.

The fan and the turbine that drive it (the LP turbine) were removed from the CF-6 design to create the LM2500.

A turboshaft engine would have the LP turbine, but not the fan, and it's output would be a rotating shaft.

The LM2500 here has no fan, and no LP turbine.

It's output is a high-velocity stream of hot exhaust gases. When connected to a separate "power turbine", the output of the pairing is a rotating shaft.

[mtleverett]

it looks like a turbo fan. but you said you mesure hp so is that a turbo shaft engine?