Another interesting note to pick up on is how the central spiralled spinner on the N1 fan is anti iced in flight. It’s very unique on the Rolls Royce engines on both the Trent series engines and on the RB211 engines with the exception of the 535 C and the 524 D series engines. The central spinner has a rubber nipple incorporated at its tip which bends. The geniuses at Rolls Royce found that during flight ice formation on the spinner formed asymmetrically which led to an imbalance on the spinner. As the ice forms it bends the rubber nipple at the tip which in turn cracks the ice up along the surface of the spinner and removes it. Very clever idea,it really is GENIUS!!! However the the 535 C and the 524D rated engines have a bull nosed shaped spinner which is Anti iced from the High Pressure bleed air system tapped off from the engine in inflight.
0:11 right engine begins to power up 0:44 accelerating up to 100% power (right engine) 3:03 accelerating up to 100% power (left engine) 5:34 engines slow down
I’m also very surprised to see that the BA engineers have not placed intake cages around these huge engines during high power runs!!!🤔🤔 these engines really don’t take prisoners they will suck a fully grown adult straight through them!! You can see the power being produced by the way they are sucking the moisture out of the air which can be seen by the white mist in the engine intakes!!!😳😳
When you see what I would call a “nodding engine” it’s time to move well out of the way of the aircraft that’s when the engines are showing you a sign that it wants to move. In my experience running one engine at a time at full power you have to carefully balance the power setting on the engine that’s not at full power to ensure the aircraft will not sway or adversely yaw. I have seen this done before where the balancing power on one engine was not correctly set and the aircraft yawed considerably which is very dangerous and highly undesirable!!!!… With the 777s you have to be very careful in ensuring the aircraft doesn’t jump chocks due to its shear size and power of the engines.
I would put this vid as your most favourite❤️❤️❤️of all the others cause it has great quality and the way it shows on the camera that the fan striped line like it spins clockwise.🔁
That means if you are lying under the engine of that plane it can suck you in anyway because that's what I saw when some kind of smoke was being sucked into the engine.
There are chocks in but they're black rubber and hard to see. However, the maintenance manual states you're not supposed to place them up against the tyres, there must be a 15cm (6inch) gap. So yes, the aircraft is being held by the brakes.
Great video but why were the mobile air stairs left in place on a engine power run above idle. A big no no as you are taking a big risk to damaging the aircraft due to fuselage movement, mobile air stairs toppling over or the aircraft jumping the chocks.
The main parameter on these Rolls Royce Trent 800s is called EPR, or Engine Pressure Ratio. The weather is fairly stable at Heathrow, we don't really get extremes of temperature or pressure. We are also only 86ft above sea level, so we are normally permitted to carry out high power engine runs at the maximum allowable static EPR of 1.4. Generally the absolute maximum at Heathrow is 1.5-1.6 EPR. 1.4 EPR equates to a N1 (Fan Rotor) RPM of around 80%. Maximum take-off thrust at Heathrow is usually around 85% N1. This is because in the low altitude moderate temperature dense air, the engine is producing it's maximum rated power at 85%ish N1.
@Samuel James Wright Not quite 1.6 usually, somewhere around 1.54 is the usual absolute maximum for take-off. Due to Heathrow's large runways I doubt they ever run the engines that high. To clarify, the absolute maximum power when the aircraft is stationary is 1.4 EPR.
I'm sure it has all been factured into the design, but there are certainly limits that must be adhered to when performing ground runs, just as there are limits to the flight envelope.
Why would they leave that small truck and stair in front of the engine at max throttle? Aren't there videos all over the internet of various things getting sucked into engines far smaller than this beast? Such a silly risk to take...
The power being transmitted through the diagonal brace/thrust strut to the wing /airframe is COLOSSAL🙈🙈 /unimaginable!!!! Effectively in basic terms the engines are trying to rip themselves off the pylons. When I say a “nodding engine” this nodding motion is due to the torque and thrust being transmitted and developed by these PARAFFIN LOVING DONKEYS. They absolutely thrive on being WORKED HARD👍👍and even more so if the ambient temperature is very cold, the freezing air gives the engine something to bite into. Colder the air the denser it is travelling through the engine which effectively makes the engine work harder to drive the compressors!! Net result more power kicked out by the engine. GREAT STUFF!! Have to admit it’s great fun watching these coal burners trying to pull themselves to pieces. Due to the shear power and size of the 777 I’m not sure if you can effectively accelerate both engines simultaneously due to the very high risk factor of the aircraft pulling itself away from the chocks.
We do check there is sufficient oil in the engine before the run, and it is monitored during the run, as is oil temperature and pressure. However, a correct 'full' oil level can only be obtained between 10 minutes to 6 hours after engine shutdown.
Not advisable leaving the steps in close vicinity to the aircraft having power runs / acceleration checks. Very surprised at British Airways this is a maintenance practice violation. Where is the crew chief/ licensed engineer🙈🙈 to check all this prior to ground runs🤔🤔 if that aircraft decides to let go and leap forward AND IT WILL given half a chance, the licensed engineer would be entirely responsible for such actions and possible damage caused!!! You really can’t mess about in situations like this. I’ve seen this happen before where the aircraft swung round and nearly went into a ground power cart. VERY SCARY AND DANGEROUS. After investigation they put it down to the ground being wet and there was some residual cleaning fluids on the run pan from a previous aircraft which had been cleaned. Under power the aircrafts undercarriage lost its grip and swung round by about 5 feet!! 🙈🙈🙈
Nice to see another video from you! I have a question. When you do these test runs. Does a certified pilot have to be there and handle the throttle or can one of you lucky guys climb in the cockpit and do it?
Thanks. Certified engineers conduct these engine test runs. To carry out high power runs you must have completed an engine ground running training course in a simulator where the the trainer throws in some problems for good measure, oil pressure dropping, oil level decreasing, high vibration, high turbine temperatures, broken engine shafts, fires etc. We're highly trained professionals don't you know :)
Thanks! Yeah I know, now worries XD But I thought maybe there is a pilot always on maintenance or something. How lucky for you! I really envy you guys.
I’ve always noticed 330’s flying overhead had a particularl sound, i could usually guess what it was by sound. i think most of those ,if not all are trents
Another interesting point to make is when the engines are being worked hard like that you can normally see a lot of white smoke bellowing from the stack pipe underneath the engine. This pipe is vent/breather pipe for the accessory engine gearbox which is driving all the engine accessories 👍 the more smoke you see the harder the gearbox is breathing. This is an engine gearbox oil breather. It cannot be seen in this video due to the wet ground and spray being produced. I wouldn’t like to be standing anywhere near that engine if a main fan blade decided to let go from the hub SCARY🙈🙈
Correct me if I'm wrong someone (Mr.I.fix.planes?), but I think the minimum safe distance from the intake at high power is about 40 ft in semicircle from the cowling?
The purpose I believe has been explained in another comment, but the fuel flow on those engines at high power is ~1.5-2 litres per second per engine (or thereabouts, at sea level and EPR 1.4).
Well then I’m delighted to hear that airlines still buy the -200ER with Trents. Although I haven’t seen a single -200ER that’s less than 15 years old...
@@VoraciousAvgeek Yeah, not many airlines seem to buy the -200ER with the T800 these days, the incident with the fuel filter really hit the T800 hard, plus these days the idea of competing engine options on the same aircraft is all but over.
@@CoolDude-yg9eq haha I don't really know much about the energy consumption of a jet engine but keep in mind that these big planes can store hundreds of thousands of liters kerosine.
Well we do lots of engine runs but they're pretty much all the same, I was hoping for some nice intake clouds and vortices with it being wet weather but I kinda messed up the camera settings somehow.
Another interesting note to pick up on is how the central spiralled spinner on the N1 fan is anti iced in flight. It’s very unique on the Rolls Royce engines on both the Trent series engines and on the RB211 engines with the exception of the 535 C and the 524 D series engines. The central spinner has a rubber nipple incorporated at its tip which bends. The geniuses at Rolls Royce found that during flight ice formation on the spinner formed asymmetrically which led to an imbalance on the spinner. As the ice forms it bends the rubber nipple at the tip which in turn cracks the ice up along the surface of the spinner and removes it. Very clever idea,it really is GENIUS!!! However the the 535 C and the 524D rated engines have a bull nosed shaped spinner which is Anti iced from the High Pressure bleed air system tapped off from the engine in inflight.
I watch this vid over and over and never get tired of watching and listening. The Trent 800 is a stunning bit of engineering.
"I want that back wall dry, and I want it dry now!"
friends : what kind of music do you listen?
me : it's hard to explain.
Gotta love those RR engines. My favourite for this aircraft.
My favourite too mate👍
0:11 right engine begins to power up
0:44 accelerating up to 100% power (right engine)
3:03 accelerating up to 100% power (left engine)
5:34 engines slow down
both the engines were fully throttled 3:04
@@thisischetan We never run both engines at full power at the same time, except once in the snow.
this slowed down the earth for 0,000775 seconds.
normal people : what's that sound, it's so annoying.
aviation enthusiasts : listen here, you little shit.
Finally a cooler that can cool a pentium 4 HT
Only if you place the chip in the bypass duct
What a wonderful and gorgeous sound and so exciting to hear! WOW! 😍😍😍😍😍
Yes if you wear headphones Sarah.🎧
man that whole plane is shaking a little bit. it's just the planes way of saying "let me loose i want to fly"
Yes it's like that the plane wants to get the hell outta here mate.LOL😂
@Lucky Cool Dude yep
Lucky Cool Dude yep it is saying lemme go lemme go I want to fly😄😂😄👍
Wow! She just wants to fly 😉
Like the engine sounds as she's like screaming,'
Get me outta here,get me outta here I
want to fly not to be stuck in a pit.😄
Great video and sound mate.👍
Thanks very much
I’m also very surprised to see that the BA engineers have not placed intake cages around these huge engines during high power runs!!!🤔🤔 these engines really don’t take prisoners they will suck a fully grown adult straight through them!! You can see the power being produced by the way they are sucking the moisture out of the air which can be seen by the white mist in the engine intakes!!!😳😳
DROOLING over that sound!
What is the safe radius from the intake? It didn't really seem to affect the truck.
I suppose around 4-5 metres though.Not to sure Jay🤔
The rear of te engine would blow that truck away
I was thinking the same.
When you see what I would call a “nodding engine” it’s time to move well out of the way of the aircraft that’s when the engines are showing you a sign that it wants to move. In my experience running one engine at a time at full power you have to carefully balance the power setting on the engine that’s not at full power to ensure the aircraft will not sway or adversely yaw. I have seen this done before where the balancing power on one engine was not correctly set and the aircraft yawed considerably which is very dangerous and highly undesirable!!!!… With the 777s you have to be very careful in ensuring the aircraft doesn’t jump chocks due to its shear size and power of the engines.
I like your explanation! Makes sense
I would put this vid as your most favourite❤️❤️❤️of all the others cause it has great quality and the way it shows on the camera
that the fan striped line like it spins clockwise.🔁
That water spraying into turbo jets for that intensive wind of turbines
Great videos, thanks
That means if you are lying under the engine of that plane it can suck you in anyway because that's what I saw when some kind of smoke was being sucked into the engine.
i would like to know the rpm that their running at.
The fan is somewhere around 2800rpm, the IP compressor around 6000rpm, and the HP compressor around 9000rpm.
Is she being held on parking brakes only? I see no chocks!
There are chocks in but they're black rubber and hard to see.
However, the maintenance manual states you're not supposed to place them up against the tyres, there must be a 15cm (6inch) gap.
So yes, the aircraft is being held by the brakes.
Great video but why were the mobile air stairs left in place on a engine power run above idle. A big no no as you are taking a big risk to damaging the aircraft due to fuselage movement, mobile air stairs toppling over or the aircraft jumping the chocks.
I would love to know what percentage thrust that was. As an aside, why don't you put the engine guards in place?
The main parameter on these Rolls Royce Trent 800s is called EPR, or Engine Pressure Ratio.
The weather is fairly stable at Heathrow, we don't really get extremes of temperature or pressure. We are also only 86ft above sea level, so we are normally permitted to carry out high power engine runs at the maximum allowable static EPR of 1.4. Generally the absolute maximum at Heathrow is 1.5-1.6 EPR.
1.4 EPR equates to a N1 (Fan Rotor) RPM of around 80%.
Maximum take-off thrust at Heathrow is usually around 85% N1. This is because in the low altitude moderate temperature dense air, the engine is producing it's maximum rated power at 85%ish N1.
@Samuel James Wright Not quite 1.6 usually, somewhere around 1.54 is the usual absolute maximum for take-off. Due to Heathrow's large runways I doubt they ever run the engines that high. To clarify, the absolute maximum power when the aircraft is stationary is 1.4 EPR.
Isn't this causing structural damage like micro cracks when plane is braking and wings are being stressed this way?
I'm sure it has all been factured into the design, but there are certainly limits that must be adhered to when performing ground runs, just as there are limits to the flight envelope.
if something must brake is's better to breaks on the ground than during flight at 33 000 ft.
Why would they leave that small truck and stair in front of the engine at max throttle? Aren't there videos all over the internet of various things getting sucked into engines far smaller than this beast? Such a silly risk to take...
The power being transmitted through the diagonal brace/thrust strut to the wing /airframe is COLOSSAL🙈🙈 /unimaginable!!!! Effectively in basic terms the engines are trying to rip themselves off the pylons. When I say a “nodding engine” this nodding motion is due to the torque and thrust being transmitted and developed by these PARAFFIN LOVING DONKEYS. They absolutely thrive on being WORKED HARD👍👍and even more so if the ambient temperature is very cold, the freezing air gives the engine something to bite into. Colder the air the denser it is travelling through the engine which effectively makes the engine work harder to drive the compressors!! Net result more power kicked out by the engine. GREAT STUFF!! Have to admit it’s great fun watching these coal burners trying to pull themselves to pieces. Due to the shear power and size of the 777 I’m not sure if you can effectively accelerate both engines simultaneously due to the very high risk factor of the aircraft pulling itself away from the chocks.
I guess before any high power run the oil levels have to be checked and replenished . Correct me if I am wrong.
We do check there is sufficient oil in the engine before the run, and it is monitored during the run, as is oil temperature and pressure.
However, a correct 'full' oil level can only be obtained between 10 minutes to 6 hours after engine shutdown.
Not advisable leaving the steps in close vicinity to the aircraft having power runs / acceleration checks. Very surprised at British Airways this is a maintenance practice violation. Where is the crew chief/ licensed engineer🙈🙈 to check all this prior to ground runs🤔🤔 if that aircraft decides to let go and leap forward AND IT WILL given half a chance, the licensed engineer would be entirely responsible for such actions and possible damage caused!!! You really can’t mess about in situations like this. I’ve seen this happen before where the aircraft swung round and nearly went into a ground power cart. VERY SCARY AND DANGEROUS. After investigation they put it down to the ground being wet and there was some residual cleaning fluids on the run pan from a previous aircraft which had been cleaned. Under power the aircrafts undercarriage lost its grip and swung round by about 5 feet!! 🙈🙈🙈
I would love to keep the engine in my room so I could cool off.
Nice to see another video from you! I have a question. When you do these test runs. Does a certified pilot have to be there and handle the throttle or can one of you lucky guys climb in the cockpit and do it?
Thanks. Certified engineers conduct these engine test runs. To carry out high power runs you must have completed an engine ground running training course in a simulator where the the trainer throws in some problems for good measure, oil pressure dropping, oil level decreasing, high vibration, high turbine temperatures, broken engine shafts, fires etc.
We're highly trained professionals don't you know :)
Thanks! Yeah I know, now worries XD But I thought maybe there is a pilot always on maintenance or something. How lucky for you! I really envy you guys.
@@mrifixplanes1813 that's why we like it here
That water spraying is for cooling? Or is some kind of water ingestion test?
No water spraying, it's just sucking the rain water off the ground and there's also some water condensing out of the air.
22:35
Nice sound
You can even hear a little buzzsaw
that is some sickening power
Is it... sucking water off the ground at 0:24?
Yes
@@dixinuranus lol
Spot on purrerhodium👍👍👍
I’ve always noticed 330’s flying overhead had a particularl sound, i could usually guess what it was by sound. i think most of those ,if not all are trents
00:09
Another interesting point to make is when the engines are being worked hard like that you can normally see a lot of white smoke bellowing from the stack pipe underneath the engine. This pipe is vent/breather pipe for the accessory engine gearbox which is driving all the engine accessories 👍 the more smoke you see the harder the gearbox is breathing. This is an engine gearbox oil breather. It cannot be seen in this video due to the wet ground and spray being produced. I wouldn’t like to be standing anywhere near that engine if a main fan blade decided to let go from the hub SCARY🙈🙈
8:30
Just imagine what if the brakes went off
It'd be goodnight vienna for the cameraman.
Hooooooooo.....
The plane would crash bro.💥
20:33
10:35
if the trucks side mirror loose , the entire engine is dead .
And do not let Malcolm Reynolds negotiate near it …
Rather strange to see the stair truck close to the bird during engine runs especially on the run side.
Correct me if I'm wrong someone (Mr.I.fix.planes?), but I think the minimum safe distance from the intake at high power is about 40 ft in semicircle from the cowling?
I was holding my breath, 😖
Trent 800
Gexch ge90
Pwpsw 4020
what was the reg on this plane
It's a Boeing 777-236E jetliner.
It's a G-YMMD reg on it.
100% sure mate😀
Thanks for asking.👍👍👍
The Mobile rile rivet lab
Really nice video. Not full thrust ? Approx EPR 1.3 ?)
Due to the usual conditions at Heathrow we normally take them to the maximum static EPR of 1.4 when a high power run is required.
what's the purpose of these power runs? I imagine that sucked up something like 1,000lbs of JET-A
The purpose I believe has been explained in another comment, but the fuel flow on those engines at high power is ~1.5-2 litres per second per engine (or thereabouts, at sea level and EPR 1.4).
they checks for oil pressures, temps leaks, unwanted vibrations etc.
Do Rolls Royce still make these engines
Yes, still being made, the updated Trent 800EP, though not many nowadays.
I thought the 777-200 was discontinued which lead to the discontinuation of the Trent 800 and PW4000?
@@VoraciousAvgeek The 777-200 was discontinued, but the 777-200ER is still being made and still has the option of the Trent 800EP.
Well then I’m delighted to hear that airlines still buy the -200ER with Trents. Although I haven’t seen a single -200ER that’s less than 15 years old...
@@VoraciousAvgeek Yeah, not many airlines seem to buy the -200ER with the T800 these days, the incident with the fuel filter really hit the T800 hard, plus these days the idea of competing engine options on the same aircraft is all but over.
Wow
I used to think engines were removed and put onto a gantry for testing.
Um...how is that vehicle not getting sucked...? 😳
A GE o som e de sirene , Roll Royce já é de Serra em potência máxima
there goes 500 liters of fuel
LoL mate😂🤣😂
@@CoolDude-yg9eq haha I don't really know much about the energy consumption of a jet engine but keep in mind that these big planes can store hundreds of thousands of liters kerosine.
is it on idle thrust?
For the first five seconds it is
❤❤❤❤❤
You don't post often, i guess maybe you dont get a lot of opportunities to film these situations
Well we do lots of engine runs but they're pretty much all the same, I was hoping for some nice intake clouds and vortices with it being wet weather but I kinda messed up the camera settings somehow.
Upload new an engine's turbo prowess
Nothing sounds
🍉🍉🍉🍉🍉🏟🏟🏟🏟🖐🖖👌✌👋🤙🏥
Little sister og GE90
🇹🇼🇹🇼🇹🇼🇹🇼🇹🇼🌻🌻🌻🌻🏆🏆🏆🏆
08:30
14:30
19:44
09:30
09:30