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astuteman
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RR begins building worlds largest jet engine

Sun Mar 28, 2021 8:59 am

Noticed this on my MSN feed this morning.

Rolls-Royce has begun building the world's largest jet engine which is designed to slash emissions for airlines post-pandemic .......
UltraFan, with a fan diameter of almost 12ft, is larger than engines produced by US rival General Electric. Its carbon titanium fan system has been built in Bristol and its 50MW gearbox – powerful enough to run 500 family cars – in Dahlewitz, Germany.


https://www.msn.com/en-gb/money/other/r ... d=msedgdhp

However, to dampen the tempo....

The long-term future of the UltraFan project, launched in 2014, remains in doubt. The grounding of flights due to Covid has thrown Rolls-Royce and its customers – including Airbus and Boeing – into crisis.


I must admit I didn't see the demonstrator being quite so big .....

Rgds
 
RJMAZ
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 9:45 am

Fan diameter is fairly easy to estimate based on the bypass ratio and thrust requirement.

A 350cm fan on the Trent Ultrafan has approximately 35% more area than the 300cm fan on the Trent XWB. That puts the bypass ratio at around 13:1 with the same thrust. Many rumours were for a bypass ratio of 14:1.
 
JonesNL
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 9:49 am

12ft, that would be 20% bigger then the GE9x!!! :eek: Would that mean the UltraFan is a full generation a head of the GE9x?
 
JonesNL
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 9:52 am

RJMAZ wrote:
Fan diameter is fairly easy to estimate based on the bypass ratio and thrust requirement.

A 350cm fan on the Trent Ultrafan has approximately 35% more area than the 300cm fan on the Trent XWB. That puts the bypass ratio at around 13:1 with the same thrust. Many rumours were for a bypass ratio of 14:1.

That would the bypass ratio 30% higher than the GE9x!
 
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Faro
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 10:03 am

Nothing about CMC's, variable turbine cooling, etc...just that they've begun building it...good luck to them...difficult times ahead...


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PM
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 12:50 pm

What kind of undercarriage would be required on any plane with these beasts under the wing?
 
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 1:30 pm

JonesNL wrote:
12ft, that would be 20% bigger then the GE9x!!! :eek: Would that mean the UltraFan is a full generation a head of the GE9x?

GE9x fan diameter = 134 inches, ref: https://en.wikipedia.org/wiki/General_Electric_GE9X
RR-UF fan diameter = "almost 12 feet" so almost 144 inches
Difference in diameter is thus around 9%, maybe less depending on what "almost" means.

Still, mighty impressive!

Huge fan plus gear plus state of the art core, very cool stuff.

I agree with Astuteman, I did not expect the demonstrator to be this big.

My next question would be, does it fit under an A350's wing?
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astuteman
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 1:30 pm

RJMAZ wrote:
Fan diameter is fairly easy to estimate based on the bypass ratio and thrust requirement.

A 350cm fan on the Trent Ultrafan has approximately 35% more area than the 300cm fan on the Trent XWB. That puts the bypass ratio at around 13:1 with the same thrust. Many rumours were for a bypass ratio of 14:1.


Out of curiosity, what is your thrust assumption? 98k?

Rgds
 
JayinKitsap
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 2:02 pm

Well the posted info indicates it has a 50MW gearbox, so we have the energy, the thrust is Force, needs a distance.

These are big ducted fans, props within a casing. I have always wondered what would be the issues with the shroud rotating with the fan, it could save a good bit of weight. But lots of thermal expansion, rotating inertia, balance and vibration, gyroscope effects,
 
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armagnac2010
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 2:21 pm

Beyond the dimension of the fan, the weight of the whole thing is an another interesting installation issue.
 
889091
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 2:24 pm

How will they transport the beast to a remote, off site location, should an engine change be required?
 
morrisond
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 2:55 pm

889091 wrote:
How will they transport the beast to a remote, off site location, should an engine change be required?


Turn it Vertical - strap a fuel tank to the bottom and some drone controls and fly it like a Helicopter! :D
 
mxaxai
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 3:01 pm

889091 wrote:
How will they transport the beast to a remote, off site location, should an engine change be required?

In pieces, similar to a propeller?
 
Opus99
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 3:05 pm

If RR get this right (fingers crossed) it’s going to be very very impressive. For this investment they should get it on both 350 and 787. At least variations on It. But some are saying a derated version might appear on NMA first
 
mxaxai
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 3:12 pm

astuteman wrote:
I must admit I didn't see the demonstrator being quite so big .....

Rgds

The fan size (140") was announced last year already when they started work on the fan blades. https://www.rolls-royce.com/media/press ... lades.aspx

They say that it's scalable "up to 100,000 lbs" but I have no idea what this demonstrator is aiming for. This would be similar to the 97,000 lbs rating of the Trent XWB-97.
 
UA748i
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 3:16 pm

Im curious as to what capabilities this will give the A350 going forward.

Could see a next generation "A350-950" and "A350-1050" in addition to the powerplant.
 
MartijnNL
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 3:16 pm

From the article:
"The engine will be suitable for both larger aircraft and the single aisle planes used for short-haul flights."

Single aisle aircraft with the worlds largest jet engine?
 
BlueberryWheats
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 3:18 pm

PM wrote:
What kind of undercarriage would be required on any plane with these beasts under the wing?


A long one!
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Bricktop
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 3:25 pm

In first for A380 twin. :duck:
 
XT6Wagon
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 3:27 pm

This... shocks me. I can't imagine either Boeing or Airbus chasing the A380 twinjet idea. Boeing has the 777 it has and needs to sell. Airbus has the A350 grinding ever closer to net money in the bank, thus no need to upset its own market.

The obvious place for a new RR engine I can see is the 787. Its popular, its been around a while, and it already has a RR engine option. More range for the -10 would be a game changer too.
 
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readytotaxi
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 3:28 pm

Just pump a bit more air in the tyres, it'll be okay.
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NameOmitted
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 3:29 pm

MartijnNL wrote:
From the article:
"The engine will be suitable for both larger aircraft and the single aisle planes used for short-haul flights."

Single aisle aircraft with the worlds largest jet engine?


Well yeah. Kind is like monster trucks, where modders take a 12-year-olds drawing of a truck and bring it to life; the world needs a plane with larger diameter engines than fuselage.
 
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 3:59 pm

mxaxai wrote:
astuteman wrote:
I must admit I didn't see the demonstrator being quite so big .....

Rgds

The fan size (140") was announced last year already when they started work on the fan blades. https://www.rolls-royce.com/media/press ... lades.aspx

They say that it's scalable "up to 100,000 lbs" but I have no idea what this demonstrator is aiming for. This would be similar to the 97,000 lbs rating of the Trent XWB-97.

Ok, so 140/134 gives us 5 percent bigger than GE9x in terms of diameter.

TXWB has 118 inch diameter blades so 140/118 gives us 19% bigger diameter, 22 inches bigger.

Could make a big improvement if/when Airbus and RR decide to make an UltraFan sized for TXWB.
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SilverwingSpttr
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 4:06 pm

Very exciting news, but what massive new aircraft is coming down the pipeline that needs this new mega-engine? Curious to see thrust rating figures, but considering the evolution from GE90-115 to GE9X saw a derating of thrust, not expecting to see this top the 100-110k lb thrust range.
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DenverTed
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 4:28 pm

Revelation wrote:
mxaxai wrote:
astuteman wrote:
I must admit I didn't see the demonstrator being quite so big .....

Rgds

The fan size (140") was announced last year already when they started work on the fan blades. https://www.rolls-royce.com/media/press ... lades.aspx

They say that it's scalable "up to 100,000 lbs" but I have no idea what this demonstrator is aiming for. This would be similar to the 97,000 lbs rating of the Trent XWB-97.

Ok, so 140/134 gives us 5 percent bigger than GE9x in terms of diameter.

TXWB has 118 inch diameter blades so 140/118 gives us 19% bigger diameter, 22 inches bigger.

Could make a big improvement if/when Airbus and RR decide to make an UltraFan sized for TXWB.

If the A350-1000 doesn't have another 20" to spare in ground clearance for the engine, I don't understand the choice of these dimensions by RR.
 
DenverTed
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 4:32 pm

Next they should be working on a 90" diameter engine to power the 797.
 
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 5:34 pm

SilverwingSpttr wrote:
Very exciting news, but what massive new aircraft is coming down the pipeline that needs this new mega-engine? Curious to see thrust rating figures, but considering the evolution from GE90-115 to GE9X saw a derating of thrust, not expecting to see this top the 100-110k lb thrust range.

DenverTed wrote:
If the A350-1000 doesn't have another 20" to spare in ground clearance for the engine, I don't understand the choice of these dimensions by RR.

I'm also not clear on the choice of size, I'll throw out some thoughts.

They have said all along this is a technology demonstrator, not something targeting a specific market segment.

They did have a proposal on paper at least to get onto the 777x, maybe their thinking was driven by that.

If you are trying to show off the gear, maybe it's a good thing to build a demonstration engine for the largest application you can think of.

DenverTed wrote:
Next they should be working on a 90" diameter engine to power the 797.

They've pretty much said they will test this engine this year and next, then stand down till if/when they get the engine onto a project going into production.

I don't think we'll see any speculative builds any time soon.

I also don't think we'll see a concrete 797 program for another two years, maybe more.

Boeing's got to get MAX10 and 777X out on the market and get a better understanding of what the regulators want to see in a next gen cockpit.

All this will take time so sort out, IMO.

RJMAZ wrote:
Fan diameter is fairly easy to estimate based on the bypass ratio and thrust requirement.

A 350cm fan on the Trent Ultrafan has approximately 35% more area than the 300cm fan on the Trent XWB. That puts the bypass ratio at around 13:1 with the same thrust. Many rumours were for a bypass ratio of 14:1.


A summary of RR's goals circa 2014:
According to R-R future programs and technology chief engineer Alan Newby, the new engines represent “the next two major steps in the evolution of the [Trent] family.” The first, he said, dubbed “Advance,” covers a collection of new technologies intended to improve thermodynamic efficiency, while the later UltraFan development will introduce a gearbox to reduce fan speed and raise propulsion efficiency.

The Advance engine will build on the Trent’s “unique” direct-drive turbine architecture and the results of several years of new-technology research, said Newby. He added that the design, which is expected to sport a bypass ratio of more than 11:1 and an overall pressure ratio of more than 60, could enter service soon after 2020.

Expected to follow about five years later, the UltraFan is aimed at offering at least a 15:1 bypass ratio and an overall pressure ratio of more than 70:1. The company suggests that, relative to the Trent 700 powering the Airbus A330, the engines will provide “significant efficiency improvements” of more than 20 percent and 25 percent, respectively. R-R plans to run its first powered gearbox next year and a demonstrator of the engine could fly before 2020.

A big change with the Advance is the core, which “redistributes the workload” between the intermediate- and high-pressure compressors and turbines (IPCs/HPCs and IPTs/HPTs). Newby said that this “good aerodynamic solution” would provide the foundation for future engine generations.

The UltraFan, which could be a stepping stone to an open-rotor design, has a similar “work split,” said Newby, but with an enhanced IP turbine driving the slower fan through a reduction gearbox, which permits deletion of the low-pressure turbine (LPT).

With deliberate product evolution, R-R has taken the Trent XWB engine’s integrated propulsion system and lightweight LTP and married them to a carbon-titanium (CTi) fan and the new core to create the Advance. In turn, the UltraFan retains the Advance core while introducing the geared multi-stage IPT to drive the fan and compressor.

Ref: https://www.ainonline.com/aviation-news ... d-ultrafan

We all know Advance never was made into its own product, although some of its features made it into TXWB and then TTEN. The big workload redistribution work never made it into a production engine, but IIRC it is part of this demonstrator, along with the carbon/titanium fan and the gear.
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 9:59 pm

UA748i wrote:
Im curious as to what capabilities this will give the A350 going forward.

Yeah, does sorta make you wonder "what's next" for aircraft that can already op 18hr+ flights (even without the -ULR modifications) already.
I myself, suspect a more prosaic motive... ~Thranduil
 
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Re: RR begins building worlds largest jet engine

Sun Mar 28, 2021 10:04 pm

DenverTed wrote:
If the A350-1000 doesn't have another 20" to spare in ground clearance for the engine, I don't understand the choice of these dimensions by RR.

The engine should comfortably fit under the A350. It wouldn't even need to resort to rounding the bottom of the nacelle like the 737NG.

astuteman wrote:
Out of curiosity, what is your thrust assumption? 98k?

Rgds

This engine would be for the A350NEO at 97k

Revelation wrote:
JonesNL wrote:
12ft, that would be 20% bigger then the GE9x!!! :eek: Would that mean the UltraFan is a full generation a head of the GE9x?

GE9x fan diameter = 134 inches, ref: https://en.wikipedia.org/wiki/General_Electric_GE9X
RR-UF fan diameter = "almost 12 feet" so almost 144 inches
Difference in diameter is thus around 9%, maybe less depending on what "almost" means.

We were looking at surface area increase, not diameter.
 
JayinKitsap
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 1:23 am

PW didn't have a lot of problems with their gearbox, but the change in RPM's of the various sections caused different conditions than previous engines, had a number of problems that needed resolution. RR's ultra fan is operating at far higher energy levels, also with sections at different RPM's than previous. All doable but a lot of testing for endurance and reliability needs to be done. Needs several thousand hours of runtime at a minimum. A healthy investment.
 
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Revelation
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 1:23 pm

RJMAZ wrote:
Revelation wrote:
JonesNL wrote:
12ft, that would be 20% bigger then the GE9x!!! :eek: Would that mean the UltraFan is a full generation a head of the GE9x?

GE9x fan diameter = 134 inches, ref: https://en.wikipedia.org/wiki/General_Electric_GE9X
RR-UF fan diameter = "almost 12 feet" so almost 144 inches
Difference in diameter is thus around 9%, maybe less depending on what "almost" means.

We were looking at surface area increase, not diameter.

Still not 20% increase:

In [22]: import math

In [23]: math.pi * (140/2)**2
Out[23]: 15393.804002589986

In [24]: math.pi * (134/2)**2
Out[24]: 14102.609421964582

In [25]: 15393.804002589986/14102.609421964582
Out[25]: 1.0915571396747605
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CowAnon
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 7:03 pm

Regarding thrust levels, Pratt & Whitney's GTF produces 15,000-33,000 pounds of thrust using gearboxes between 12 and 24 megawatts of capacity (source: Aerospace America, Oct 2018). Extrapolating from 24 to the 50-MW size of the announced Ultrafan demonstrator gives you 69,000 lbs of thrust. That's not enough to apply to the existing A350 models, but I don't think it's necessary to assume that the demonstrator would have a similar thrust level than the finished application. Also, Rolls-Royce said its gearbox technology was designed to subsequently reach 100,000 horsepower (74.6 MW), so the current demonstrator's 50 MW capacity is a lot smaller than the eventual target.
 
Baldr
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 7:30 pm

RJMAZ wrote:
DenverTed wrote:
If the A350-1000 doesn't have another 20" to spare in ground clearance for the engine, I don't understand the choice of these dimensions by RR.

The engine should comfortably fit under the A350. It wouldn't even need to resort to rounding the bottom of the nacelle like the 737NG.

astuteman wrote:
Out of curiosity, what is your thrust assumption? 98k?

Rgds

This engine would be for the A350NEO at 97k

Revelation wrote:
JonesNL wrote:
12ft, that would be 20% bigger then the GE9x!!! :eek: Would that mean the UltraFan is a full generation a head of the GE9x?

GE9x fan diameter = 134 inches, ref: https://en.wikipedia.org/wiki/General_Electric_GE9X
RR-UF fan diameter = "almost 12 feet" so almost 144 inches
Difference in diameter is thus around 9%, maybe less depending on what "almost" means.

We were looking at surface area increase, not diameter.


As reported by Guy Norris in the Feb. 8-21 (page 19) edition of AW&ST, the UltraFan demonstrator engine will have a 15:1-bypass-ratio fan and it will be rated at 87,000 lb thrust -- and not a 13:1 bypass ratio and a thrust of 97,000 lbf, as you seem to believe.

In fact, the UltraFan demonstrator engine seems to be a very suitable engine application for an A350-900neo.

The higher thrust UltraFan engine that will be developed for the A350-1000neo and stretched A350-2000 will also have a larger diameter fan and a larger diameter nacelle -- i.e unlike the fan of the TXWB-97 engine which runs faster than that of the lower thrust TXWB-84 engine, but which can be accommodated in a common nacelle with unchanged aerodynamics. Originally planned with a thrust of 93,000 lbf, the additional power for the TXWB-97 engine was obtained via a 6-percent increase in fan flow, combined with a slight change in bypass ratio and aerodynamic improvements in the larger core that increases flow.

Source: https://aviationweek.com/mro/aircraft-propulsion/pictures-rolls-royce-ultrafan-building-blocks
Last edited by Baldr on Mon Mar 29, 2021 7:55 pm, edited 1 time in total.
 
smartplane
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 7:47 pm

MartijnNL wrote:
From the article:
"The engine will be suitable for both larger aircraft and the single aisle planes used for short-haul flights."

Single aisle aircraft with the worlds largest jet engine?

Seems the announcement deflects interest from smaller applications presumably under development at the Airbus NB skunk works in Bavaria, which include a RR and PW joint venture.
 
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 7:56 pm

LAX772LR wrote:
UA748i wrote:
Im curious as to what capabilities this will give the A350 going forward.

Yeah, does sorta make you wonder "what's next" for aircraft that can already op 18hr+ flights (even without the -ULR modifications) already.


1) Doing so with lower fuel consumption and 2) Ability to perform ULH routes like SYD-LHR/JFK with a decent payload.

This engine will probably fit on an A350, just eyeballing it. They will need to pay attention to the contour of the nacelle, but the fan should fit. In addition, the engine can be scaled down for smaller applications.
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LAX772LR
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 9:05 pm

DocLightning wrote:
1) Doing so with lower fuel consumption and 2) Ability to perform ULH routes like SYD-LHR/JFK with a decent payload.

Indeed, though to TBF, they're already planning the latter with current tech.

Of course, something like this could only improve. :)
I myself, suspect a more prosaic motive... ~Thranduil
 
tomcat
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 9:59 pm

DocLightning wrote:

This engine will probably fit on an A350, just eyeballing it. They will need to pay attention to the contour of the nacelle, but the fan should fit.


To be more specific, the clearance between the tip of the drain mast of the nacelle and the ground is 60 cm on the A359. The clearance is 76 cm between the nacelle itself and the ground (both per the A350 airport planning document). This leaves some room for growth but not tons of it. By comparison, the clearances on the 77W and 779 are 73 and 86 cm respectively and I don't see any drain mast sticking below of the nacelles of the GE engines.

On the upper side, the clearance between a potentially larger nacelle and the outboard tip of the droop nose can be a concern as well.

This being said, Airbus and RR may not be targeting a 15:1 bypass ratio for a future A350NEO, the current Trent XWB being at less than 10:1. The 15:1 bypass ratio could maybe be considered for clean sheet designs only.
 
SurlyBonds
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 10:21 pm

SilverwingSpttr wrote:
Very exciting news, but what massive new aircraft is coming down the pipeline that needs this new mega-engine?.


Would this engine be powerful enough for the twin-engine, double-deck "ecoliner"?
 
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Blimpie
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 10:47 pm

Do we even know if this engine is being designed for commercial aviation? I can't think of a plane today or even tomorrow that would use this engines, but I could see a military aircraft that could.
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LAX772LR
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 11:13 pm

Blimpie wrote:
I can't think of a plane today or even tomorrow that would use this engines

.......even though the most likely contender has been mentioned more than a dozen times already in this thread alone?? :boggled:
I myself, suspect a more prosaic motive... ~Thranduil
 
Baldr
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Re: RR begins building worlds largest jet engine

Mon Mar 29, 2021 11:32 pm

tomcat wrote:
DocLightning wrote:

This engine will probably fit on an A350, just eyeballing it. They will need to pay attention to the contour of the nacelle, but the fan should fit.


To be more specific, the clearance between the tip of the drain mast of the nacelle and the ground is 60 cm on the A359. The clearance is 76 cm between the nacelle itself and the ground (both per the A350 airport planning document). This leaves some room for growth but not tons of it. By comparison, the clearances on the 77W and 779 are 73 and 86 cm respectively and I don't see any drain mast sticking below of the nacelles of the GE engines.

On the upper side, the clearance between a potentially larger nacelle and the outboard tip of the droop nose can be a concern as well.

This being said, Airbus and RR may not be targeting a 15:1 bypass ratio for a future A350NEO, the current Trent XWB being at less than 10:1. The 15:1 bypass ratio could maybe be considered for clean sheet designs only.


As illustrated in the link below, the UltraFan engine will be mounted higher on the wing:

2.1.2. Modified Aircraft Configuration

With the UltraFan, Rolls-Royce plans to enhance the next-generation engine with an overall pressure ratio of more than 70:1 [20]. An UltraFan demonstrator is developed within the European Union founded project Clean Sky. Since the UltraFan has a much larger diameter than conventional engines, a key focal point in the project framework Engines ITD is the analysis of the aerodynamic coupling effects of the engine and the wing [21].

Figure 3 visualizes the difference in the outer shape of the two engine variants. At the top half of Figure 3, it can be seen that the ground clearance between the two variations stays the same. The topology of the load-carrying structures and the element partition is unchanged between the baseline and the modified configuration.

Table 2 lists the engine parameters for the baseline and the modified configuration. The outer diameter is increased by one meter and the mass per engine by 850 kg. The position of the engine’s center of gravity (CG) is shifted one meter to the front and a half meter upwards.


https://www.mdpi.com/2226-4310/8/1/2
 
T4thH
Posts: 1183
Joined: Thu Jun 06, 2019 11:17 pm

Re: RR begins building worlds largest jet engine

Tue Mar 30, 2021 12:15 am

Blimpie wrote:
Do we even know if this engine is being designed for commercial aviation? I can't think of a plane today or even tomorrow that would use this engines, but I could see a military aircraft that could.

The Ultrafan development is part of the EU Clean Sky 1 and Clean Sky 2 programs. So it has been developed only for civil use.
It is in development for the proposed A350 Neo, for which Airbus has already hired a development engineering team in Spain and France two or three years ago.
So no military use planned (or announced).

Of course, regarding COVID...Yes, also the Ultrafan and A350 Neo got "Covid 19"....
 
UA748i
Posts: 109
Joined: Mon May 06, 2013 11:53 pm

Re: RR begins building worlds largest jet engine

Tue Mar 30, 2021 12:19 am

LAX772LR wrote:
UA748i wrote:
Im curious as to what capabilities this will give the A350 going forward.

Yeah, does sorta make you wonder "what's next" for aircraft that can already op 18hr+ flights (even without the -ULR modifications) already.


Well, not just that.

By the end of the decade (if there is even an airline industry left), the 777-300ER replacement cycle will be in full swing. Even the handful of 77X customers, as well as current A350 customers. are going look at the A350neo very closely.

Id second to guess that the 77X wont last beyond 2030 in terms of sales, and the market will want a more efficient large twin by then

Personally, I think it would be a winner.

If the A380 stayed alive, the A380plus would've been a possibility too.
 
User avatar
william
Posts: 3401
Joined: Thu Jun 10, 1999 1:31 pm

Re: RR begins building worlds largest jet engine

Tue Mar 30, 2021 12:29 am

Is the variable pitch reverse still off the table for now?
 
fanofjets
Posts: 2032
Joined: Thu Apr 13, 2000 2:26 am

Re: RR begins building worlds largest jet engine

Tue Mar 30, 2021 12:51 am

The Airbus A340 was originally to be powered by an engine called the SuperFan. With the UltraFan, we have come a long way since then!
The aeroplane has unveiled for us the true face of the earth. -Antoine de Saint-Exupery
 
TTailedTiger
Posts: 2953
Joined: Sun Aug 26, 2018 5:19 am

Re: RR begins building worlds largest jet engine

Tue Mar 30, 2021 12:54 am

It doesn't seem wise when RR claims they don't have much cash around.
 
FGITD
Posts: 1485
Joined: Wed Jun 15, 2016 1:44 pm

Re: RR begins building worlds largest jet engine

Tue Mar 30, 2021 1:53 am

889091 wrote:
How will they transport the beast to a remote, off site location, should an engine change be required?


Didn’t see anyone actually answer...

The engine would be shipped separate from the fan blades. Brings down to a much more manageable size, but does mean it takes a bit longer to do a swap since you have to disassemble/reassemble more of the entire engine.

A ge90 with the mounting stand for example fits on a 20ft Pallet that can go into most cargo aircraft. The transport rack for the fan blade assembly can fit on a standard pmc pallet.

It gets more complicated when you have to replace the cowling etc.
 
Vladex
Posts: 531
Joined: Sat Oct 26, 2013 2:44 pm

Re: RR begins building worlds largest jet engine

Tue Mar 30, 2021 2:06 am

This was always meant for A380 NEO but apparently it was not meant to be. No , it doesn't fit 787 and just barely A350 but only 19" ground clearance .. An engine like this could make an electric wide body finally a possibility by 2030.
 
WayexTDI
Posts: 2156
Joined: Fri Sep 21, 2018 4:38 pm

Re: RR begins building worlds largest jet engine

Tue Mar 30, 2021 2:34 am

FGITD wrote:
889091 wrote:
How will they transport the beast to a remote, off site location, should an engine change be required?


Didn’t see anyone actually answer...

Really? Post #13:
mxaxai wrote:
In pieces, similar to a propeller?
 
FGITD
Posts: 1485
Joined: Wed Jun 15, 2016 1:44 pm

Re: RR begins building worlds largest jet engine

Tue Mar 30, 2021 2:36 am

WayexTDI wrote:
FGITD wrote:
889091 wrote:
How will they transport the beast to a remote, off site location, should an engine change be required?


Didn’t see anyone actually answer...

Really? Post #13:
mxaxai wrote:
In pieces, similar to a propeller?


“Similar to a propellor” doesn’t really explain how you ship the biggest turbofan engines in existence.

My apologies, I’ll refrain from sharing my professional experiences on this forum in the future.

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