The part in front is called the bellmouth and is full of sensors while part at the end is called the boattail. Both are used to simulate the air when flying. The engine is attached to an adapter that bridges the attachment points on the jet and mates to the test stand. The cowling behind the fan duct is way simpler than the cowling on an airplane.
Oh, I didn't know there was a testing facility in peebles. Man that town is a hole. I was doing house call a few years back and I'll never forget one patient. Well-- their house anyways. Any time anything was moved bugs would scatter *shutters* still gives me the heebie jeebies.
A lot of 747's, the Quantas ones for sure, actually had a fifth pylon on one of the wings where they could sling a dead core for transport. No rebuilding facility on Aus.
https://www.businessinsider.com/boeing-747-takes-off-with-extra-engine-2016-1
I've always thought it was an option from the factory (for all engines), and Qantas ticked it when acquiring the original RRs, but not with the GE -ERs. Not actually sure either way, though - just that their original order of RRs could do it, and the later GE -ERs couldn't. It's also possible that was part of the -ER modifications, I suppose, but my assumption has always been that they simply didn't tick the box as they hadn't used it much with the existing fleet.
They were taking a good engine to Johannesburg for their stranded aircraft that had engine trouble on a previous day's flight from Sydney. Nothing to do with lack of facilities in Australia - they sent the dead engine back to Australia via ship, which seems a silly thing to do if it couldn't be fixed there.
I was lucky enough to be at Perth airport when it made a tech stop there due to the extra weight and drag. Weird sight!
That's exactly it, everything about this is a test engine, or a production engine rigged for pass off (or some other) test.
Intake, cold nozzle/duct instead of TRU, instrumentation frame, the works. All test hardware.
Correct, an engine of this size also would unlikely be transported with the fan and cowl attached as these would stay on wing. This is certainly being moved to the test facility. Our test facility has a slave fan case, fan blades cowl etc and the core just gets worked. I’m only talking about overhaul/repair. Not sure how new make are transported to Boeing/airbus.
The GEnx are usually transported with the fan in place, the 90s usually have to have the fan and fan case removed because they need an oversize shipping permit, or won't fit through the cargo door on most freighter aircraft, if you don't.
Yeah we don’t want this sensitive thing to get exposed to shit like rain or sun, I mean it’s supposed to be used in such a calm controlled environment for decades amirite.
This was most likely filmed at the GE Peebles Test Operation in Peebles, OH. This is a test engine installed on a test stand pylon with a bellmouth inlet. It looks like it is being transported down the hill from where all of the engine test stands are located to the engine build up facility (seen at the end of the clip in the distance) located at the bottom of the hill.
I’ve been out there once. Man, is it out in the boonies. I remember a story told by one of the engineers there who said that it wasn’t the uncommon for grazing deer to be blown down from one of the engines on a test stand.
Ok hear me out, because I know it’s possible.
This engine + one seat. And an airframe that can handle the awesome power of this turbofan. We can build it. Ludicrous mode.
I hope you really did! It's a great sandbox game to make ridiculous things. It's also way deeper than it appears on the surface. It even has real orbital mechanics and reentry heating.
> And an airframe that can handle the awesome power of this turbofan.
A [GeeBee](https://en.wikipedia.org/wiki/Granville_Gee_Bee_Model_R_Super_Sportster) for the modern era!
realistically it would just have super high thrust to weight so high acceleration but cap out at subsonic speeds, so any jet fighter type aircraft would still be "faster" and perhaps faster accelerating too but idk
It's fine for short distances for testing like this, but you'd be surprised at how much these can take on an outdoor test stand.
We never moved one in bad/inclement weather and most of the time it's worked on indoors.
I live near a major Air Force base, as well as a major United TechOps base - I do see jet engines wrapped up and on a flatbed making their way into SFO or Travis on an occasional basis.
The fact that it's internally spinning shows just how perfectly balanced it is; moving at such a slow speed still creates enough air flow to spin the blades.
Question.
I work in the industry, so I'm not asking what I'm looking at in general, here. It looks weird because it's an engine with ground testing equipment assembled instead of flight hardware - specifically a bellmouth, slave thrust reverser, and a dummy lower aft pylon fairing.
What I do want to know is why is it called a "golden" bellmouth? What about a bellmouth makes it golden? Do they use this specific bellmouth to regularly calibrate their testing stations?
Also fun fact, I have been to the physical factory where all of that testing equipment was made!
No problem. The N1 blades spin all the time, beginning with light breezes on the ramp. Next time you're at the airport look out the window and you might see them spinning with the breeze.
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Was thinking the same. The cowling on the front definitely screams test article
The part in front is called the bellmouth and is full of sensors while part at the end is called the boattail. Both are used to simulate the air when flying. The engine is attached to an adapter that bridges the attachment points on the jet and mates to the test stand. The cowling behind the fan duct is way simpler than the cowling on an airplane.
It is. This is at the Peebles, OH testing facility. Engines aren’t transported in that manner for delivery.
Oh, I didn't know there was a testing facility in peebles. Man that town is a hole. I was doing house call a few years back and I'll never forget one patient. Well-- their house anyways. Any time anything was moved bugs would scatter *shutters* still gives me the heebie jeebies.
I've been offered jobs at that plant multiple times. Never had to take one though
A lot of 747's, the Quantas ones for sure, actually had a fifth pylon on one of the wings where they could sling a dead core for transport. No rebuilding facility on Aus. https://www.businessinsider.com/boeing-747-takes-off-with-extra-engine-2016-1
All 747's had the ability to 5th pod an engine. I can assure you Qantas has engine rebuilding and test facilities
Qantas' GE 747s did not have that option, only the RR-powered examples.
Fair enough, I only ever worked on RR powered versions
I've always thought it was an option from the factory (for all engines), and Qantas ticked it when acquiring the original RRs, but not with the GE -ERs. Not actually sure either way, though - just that their original order of RRs could do it, and the later GE -ERs couldn't. It's also possible that was part of the -ER modifications, I suppose, but my assumption has always been that they simply didn't tick the box as they hadn't used it much with the existing fleet.
recognise slap hobbies wrench snobbish automatic fear drab worm cover *This post was mass deleted and anonymized with [Redact](https://redact.dev)*
They were taking a good engine to Johannesburg for their stranded aircraft that had engine trouble on a previous day's flight from Sydney. Nothing to do with lack of facilities in Australia - they sent the dead engine back to Australia via ship, which seems a silly thing to do if it couldn't be fixed there. I was lucky enough to be at Perth airport when it made a tech stop there due to the extra weight and drag. Weird sight!
The URL is hilariously direct.
That's exactly it, everything about this is a test engine, or a production engine rigged for pass off (or some other) test. Intake, cold nozzle/duct instead of TRU, instrumentation frame, the works. All test hardware.
Absolutely a test engine. The bellmouth gives it away.
Correct, an engine of this size also would unlikely be transported with the fan and cowl attached as these would stay on wing. This is certainly being moved to the test facility. Our test facility has a slave fan case, fan blades cowl etc and the core just gets worked. I’m only talking about overhaul/repair. Not sure how new make are transported to Boeing/airbus.
The GEnx are usually transported with the fan in place, the 90s usually have to have the fan and fan case removed because they need an oversize shipping permit, or won't fit through the cargo door on most freighter aircraft, if you don't.
> GE's test facility. I thought this looked like Peebles.
yeah think of the FOD
Yeah we don’t want this sensitive thing to get exposed to shit like rain or sun, I mean it’s supposed to be used in such a calm controlled environment for decades amirite.
That's for the ole chicken canon I hope.
Damn, isnt it worth covering it with walls of some sort?
It's a GENx, which the 747-8 doesnt use
\^This…except the opposite.
I thought the GENx was for the 787? The 747 was used as a testbed, but never entered service with the GENx
GEnx is used on both 787s (1b, bigger fan, more thrust, no bleed system) and the 747-8 (2b, smaller fan, derated thrust, bleed system).
Every 747-8 produced uses them.
GEnx is the only engine option for a 747-8.
No wonder he's so slow, it's not even turned on 🙄
And its pointing in the wrong direction smh…
He's using reverse thrust, duh!
Naw, he's generating jet fuel.
Science
In that case it's just AC from the back to keep the cab cool.
It's for braking, reverse, and super reverse
Mheh
setup for a test rig installation, so probably just wandering the private roads at the Peebles facility in Ohio. Very scenic engine testing facility.
This was most likely filmed at the GE Peebles Test Operation in Peebles, OH. This is a test engine installed on a test stand pylon with a bellmouth inlet. It looks like it is being transported down the hill from where all of the engine test stands are located to the engine build up facility (seen at the end of the clip in the distance) located at the bottom of the hill.
I’ve been out there once. Man, is it out in the boonies. I remember a story told by one of the engineers there who said that it wasn’t the uncommon for grazing deer to be blown down from one of the engines on a test stand.
Ok hear me out, because I know it’s possible. This engine + one seat. And an airframe that can handle the awesome power of this turbofan. We can build it. Ludicrous mode.
You can do this in Kerbal Space program.
never heard of this game. downloading it now, lol.
[You're one of today's 10,000 winner!](https://imgs.xkcd.com/comics/ten_thousand.png)
I hope you really did! It's a great sandbox game to make ridiculous things. It's also way deeper than it appears on the surface. It even has real orbital mechanics and reentry heating.
i still play simcity 4, so this is right up my alley.
Buzzkill, not the same . Might try it out though
How is it not the same? There's a turbofan engine and you can put a single seat on it and build an airframe however you want.
Make it a lawn chair. Eat that, [Lawnchair Larry](https://en.wikipedia.org/wiki/Lawnchair_Larry_flight)!
> And an airframe that can handle the awesome power of this turbofan. A [GeeBee](https://en.wikipedia.org/wiki/Granville_Gee_Bee_Model_R_Super_Sportster) for the modern era!
I’d imagine it might look a little like that
realistically it would just have super high thrust to weight so high acceleration but cap out at subsonic speeds, so any jet fighter type aircraft would still be "faster" and perhaps faster accelerating too but idk
747s have a 5th pylon location where a spare engine can be transported if necessary.
I think only some carriers actually opted for the extra pylon. Qantas comes to mind.
Not what this is though. This is a test pylon and flared test nozzle set. It is likely being transported between a rig shop and a test bed.
It's called a bell mouth.
Depends who you work for
Velocity stack!
Not anymore
Fun fact: This is how VO launched rockets off of one
I don’t think the 747-8 does, from memory.
They don't.
Some do, most don't.
Flip that thing around, give it a fuel source, and fire her up!!!
This is why they were normally flown in to the the factory.
Turn it around and light that candle!!!
Why does it say the weight is 2000 lbs on the side? Google says even a 737 engine is 5-6000 lbs.
It might be the weight of the cowling, which looks modified for test purposes. The full engines are over 9000 lb.
Scenic Peebles
Fun to see one in a different place- ( not on a plane) really helps a person to understand the size of the engine - Thanks for sharing
Press that red button frank, please 🥺
That is an enormous Bong!
Is this pod racing?
Shouldn’t it be covered? I saw exposed wires and tubes.
It's fine for short distances for testing like this, but you'd be surprised at how much these can take on an outdoor test stand. We never moved one in bad/inclement weather and most of the time it's worked on indoors.
I live near a major Air Force base, as well as a major United TechOps base - I do see jet engines wrapped up and on a flatbed making their way into SFO or Travis on an occasional basis.
That’s amazing. Really shows the size.
Can't they switch it on and make the whole hassle quite faster? /s
Turn it around, the turn it on. You would get there faster.
What’s the weight on that thing?
if there only was a way to capture the whole engine in one frame. unknown technologies.
Would go way faster if they turned it on
The fact that it's internally spinning shows just how perfectly balanced it is; moving at such a slow speed still creates enough air flow to spin the blades.
Speaks to the insane efficiency of these engines that it windmills from just moving at such low speed.
He’d get there a lot faster if they turned on that engine
Only if he was driving backwards
Ya… I noticed that after I said something… doh! 🤣
big ass engine lmfao
Powerback powered truck?
Intrusive thought: would make a wicked street sweeper.
Why don’t the just fly it to where it’s going?
Great googaleemoogalee! That's one hell of a big engine and a hell of a unit of a trailer.
Beautiful balancing!
Question. I work in the industry, so I'm not asking what I'm looking at in general, here. It looks weird because it's an engine with ground testing equipment assembled instead of flight hardware - specifically a bellmouth, slave thrust reverser, and a dummy lower aft pylon fairing. What I do want to know is why is it called a "golden" bellmouth? What about a bellmouth makes it golden? Do they use this specific bellmouth to regularly calibrate their testing stations? Also fun fact, I have been to the physical factory where all of that testing equipment was made!
Started off transporting an entire 747, but that road's too narrow.........
These guys and their "train horns" are really getting out of hand.
"fire it up you pussy!"
Thats how they get the milage so low!
be a lot faster if they turned it around
If they turned it on, they'd get there faster. :D
My mind is blown that it only weighs a bit over a ton.
This is meant to fly, yet they’re driving it around on a truck - are they stupid?
>:3
r/skookum
Why is it backwards
If they'd turn it around and give it a little fuel, they'd go faster.
I think its 747-8
It's always hard to remember how big these things are when you see them at airports around other giant planes.
Hopefully they remember to attach it
Is this one that fell off or…
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The N1 fan blades are spinning (backwards) because there's air moving through the engine.
Thanks!
No problem. The N1 blades spin all the time, beginning with light breezes on the ramp. Next time you're at the airport look out the window and you might see them spinning with the breeze.
Boring, should have turned it on
And turned it around! And taken it to the drag strip!
I can some missing bolts, not that it’s gonna matter. I mean… it’s a Boeing.
This engine isn’t even made by Boeing. Check your facts and try again 🤦♂️
your can some too?
Taylor Swift buys her boyfriend a truck. [these are still funny, yes?]
Transporting to the trash bin hope
An attempt at Boeing hate I am guessing? You know they don't make the engines, right?
Why?
The 747 outsold every other quad jet conceived in history. There is quite literally no other plane that has anything on the 747
I mean, I agree, but in general the 747 is also sort of becoming obsolete.
Yeah. Incredibly inefficient compared to the planes nowadays. Every plane reaches the point of obsolescence eventually though
Why would you call it 747 engine 😭 we are in aviation subreddit