okees
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A380 Vs 777 Engine Size

Thu Mar 02, 2006 6:43 am

Hi, i did a search but couldnt find anything regarding this topic. I was wondering which aircraft has a bigger engine, the A380 or the 777? I believe its the 777 but im not sure.

Thanks
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ikramerica
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 6:46 am

the 777 by a little bit.

might try looking at RR website, considering they make engines for both planes and list their dimensions there.
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dw747400
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 6:48 am

IIRC, it depends on the model 777 and engine manufacturer. Some of the early models have smaller engines (in terms of fan diameter) than the A380, but the GE90-115B found on the 777-300ER is the largest jet in the world.

I'd look up some more specifications for you, but I've got to run out. I'm sure someone else can give you some additional details such as exact diameter and thrust numbers.

[Edited 2006-03-01 22:50:56]
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ikramerica
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 6:53 am

yeah, I just checked RR and they are both basically the same size, as are the 787/350 engines, all within a few inches of fan diameter.

I think at GE though, the 777 fan is bigger than the GE partnered engine on the A380.
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EMBQA
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 7:06 am

There was a thread a few months back but I could not find it...

The Boeing 777 engine is much bigger.

GE90-

Fan Dia: 135"
Length: 287"

RR Trent 900-

Fan Dia:116"
Lenght: 179"
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DAYflyer
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 7:45 am

Quoting EMBQA (Reply 4):
GE90-

Fan Dia: 135"
Length: 287"

RR Trent 900-

Fan Dia:116"
Lenght: 179"

A surprising difference until one considers the thrust of the respective engines (75,000 lbs vs 110,000 IIRC)
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BR076
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 7:48 am

Quoting EMBQA (Reply 4):

The Boeing 777 engine is much bigger.

but A380 has 4  Wink
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jacobin777
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 7:54 am

Quoting BR076 (Reply 6):
but A380 has 4

but the 777 is much lighter and the question was which engine, which is assumed as "per engine"...... Wink


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andessmf
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 8:14 am

Highlight of my year 2005, driving home by KMHR and finding that the 777LR has been there for a week!!!!!! And they kept it quiet!!!!!!!!!!!!!!!

Anyway, stayed and asked a few questions, ended up they were leaving shortly. Saw the van carry the crew to the plane (is that woman test pilot single??) and marvelled at the size of the 115s. Thats what I call 'engine envy'. The takeoff was even better.
 
okees
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 8:38 am

Thanks guys, i guess the conclusion is.. 777 engine > A380 engine. thanks!

okees
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Stealthz
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 9:04 am

Quoting EMBQA (Reply 4):
GE90-

Fan Dia: 135"
Length: 287

Remarkable really, Fan is so big you could almost consider using a 737 fuselage section as an engine cowling.. have to be a 737, 717 fuselage would be too small!
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dw747400
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 9:17 am

Quoting Okees (Reply 9):
Thanks guys, i guess the conclusion is.. 777 engine > A380 engine. thanks!

Had some time to check the facts now. Both the PW40XX series and Trent 800 series used on the 777 are smaller (fan diameter) than the GP7000 and Trent 900 on the A380 (110", 112", 116", and 116" respectively). The GE90, is of course, singificantly larger in all incarnations.

In terms of power, the Trent 900 produces more thrust (76,500 on the A380F and certified to 80,000) than the first generation 777 engines (starting at 74,000 for the PW and 75,000 for the Trent).
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zeke
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 10:27 am

I thought the 380 had a larger outside diameter but a smaller fan over the ge90-115b
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tepidhalibut
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RE: A380 Vs 777 Engine Size

Thu Mar 02, 2006 6:45 pm

Quoting Dw747400 (Reply 11):
In terms of power, the Trent 900 produces more thrust (76,500 on the A380F and certified to 80,000) than the first generation 777 engines (starting at 74,000 for the PW and 75,000 for the Trent).

True, but the same Trent 800 engine hardware can also be operated at Trent 895 rating - 95,000 lbf ! More thrust that the Trent 900. (Which is certified for 70,000lbf thru 80,000lbf with the same build spec.)

Generally, engines are getting bigger. At a thrust, the bigger the fan diameter, the slower the fan has to turn to produce that thrust/airflow. The slower the fan, the quieter it is. It also contributes to efficiency, and less energy from Bird Impacts.

HTH.
 
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RE: A380 Vs 777 Engine Size

Sat Mar 04, 2006 4:42 pm

Quoting Andessmf (Reply 8):
is that woman test pilot single??)

 rotfl  she's old enough to be a grandma!
 
prebennorholm
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RE: A380 Vs 777 Engine Size

Wed Mar 08, 2006 9:48 am

The A380 engines are not particularly large these days. The pax version flies with 70k lbs thrust engines.

That's even less than the heaviest 330 which have up to 73k lbs engines (ex. PW 4173).

But what counts for certification is the combined thrust with one engine shut down at the most unfavorable time during take off run. Then the A380 will have 3 x 70 = 210k lbs while the heaviest 777 will have 1 x 115 = 115k lbs remaining thrust.

The somewhat heavier A380F has 77k lbs engines.

Also the present A380-800 is a baseline version with a stretch potential. On the other hand I would assume that the 777-300ER has reached the tops of its capacity potential.
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DfwRevolution
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RE: A380 Vs 777 Engine Size

Wed Mar 08, 2006 10:26 am

Quoting Prebennorholm (Reply 15):
On the other hand I would assume that the 777-300ER has reached the tops of its capacity potential.

The Ge90-115B is certified at 115,000 lbf but GE has performed extended, stable runs at 127,000 lbf.

The Ge90 core itself is but a baby compared to some of the maritime and utility turbines Ge manufactures, and the Ge90/Trent could likely be scaled to 150,000 lbf before significant design and logistic problems would arise.

Quoting TepidHalibut (Reply 13):
True, but the same Trent 800 engine hardware can also be operated at Trent 895 rating - 95,000 lbf !

The Trent 895 doesn't run at 95,000 lbf
 
prebennorholm
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RE: A380 Vs 777 Engine Size

Thu Mar 09, 2006 3:34 am

Quoting DfwRevolution (Reply 16):
The Ge90-115B is certified at 115,000 lbf but GE has performed extended, stable runs at 127,000 lbf.

All engines have performed extended, stable runs at considerably higher thrust levels than what they later were certified for in airline use.

Quoting DfwRevolution (Reply 16):
Ge90/Trent could likely be scaled to 150,000 lbf before significant design and logistic problems would arise.

Yes, you are right.

But to utilize such an engine we would need a one million lbs MTOW twin. That's hardly a stretched 777. It would need a new, larger wing, new landing gears. And the fuselage of the 300 variant is already pretty close to the 80m limit. It is already longer than the 380 and almost as long as the 346.

A 150k lbs engine would of course have to demonstrate extended and stable runs at 160-170k lbs before being certified.
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louA340
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RE: A380 Vs 777 Engine Size

Wed Mar 15, 2006 5:59 am

I'm not an expert here, but I just presume that since the A380 has 4 engines and the 777 only had 2, it would justify the 777 having a larger engine since it would need more thrust per engine.
And in a rare situation where u have an engine failure on a 777, the other engine should be able to muscle out enough thrust to keep the aircraft in the air.
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Starlionblue
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RE: A380 Vs 777 Engine Size

Wed Mar 15, 2006 2:18 pm

Quoting LouA340 (Reply 18):
And in a rare situation where u have an engine failure on a 777, the other engine should be able to muscle out enough thrust to keep the aircraft in the air.

And enable climb from the ground at max takeoff weight.
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Zkpilot
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RE: A380 Vs 777 Engine Size

Thu Mar 16, 2006 8:19 pm

Hey all, I remember reading an email about a year ago regarding what affects modern technology, specifically engines. It went something like this...
The largest jet engine for commercial airliners is the Ge 90 turbofan which is on the Boeing 777 aircraft.
Currently this is likely to be the largest turbofan to be built for many years. The reason being that to transport this engine from the manufacturer to the aircraft requires a slightly older technology...trains.
Trains are rather fixed on where they can go because they are on rails and need to pass under bridges/tunnels that are big enough to fit the engine.
Rails are of a certain fixed width and to transport a larger engine would require wider rails.
Rail width, is another piece of technology which goes back before modern trains and was origionally taken from the standard width of a horse drawn carriage.
Horse drawn carriage had its wheel width taken back from the size of tracks on the roads/paths of the day.
These track sizes on roads and paths have been around for many hundreds of years, in fact they were origionally designed to a standard size to take chariots.
Chariots... who was the first major nation to use chariots? The Roman Empire!!!
so in 2500 years the best transportation that we can come up with is limited by the size of something that leads all the way back to the Roman Empire! Aren't we so advanced? or was it they that were advanced?  Smile
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don81603
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RE: A380 Vs 777 Engine Size

Tue Mar 21, 2006 10:12 pm

Quoting StealthZ (Reply 10):
Remarkable really, Fan is so big you could almost consider using a 737 fuselage section as an engine cowling.. have to be a 737, 717 fuselage would be too small!

Actually, this comment reminds me of a "visit" I had to the T7 assembly line about 6 or 7 years ago (I think). I was delivering 2 T7 engine strut assemblies from the Beoing plant in Winnipeg, and while they were unloading, I was staring thunderstruck at this massive plane. One of the workers commented that "you could pass the fuse of a 737 through the engine nacelle of this beast."

That day I knew I wanted to eventually fly on one of these birds. When I got the chance, I slept the entire flight  Sad
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YYZYYT
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RE: A380 Vs 777 Engine Size

Wed Mar 22, 2006 4:45 am

Quoting Zkpilot (Reply 20):
Rail width, is another piece of technology which goes back before modern trains and was origionally taken from the standard width of a horse drawn carriage.
Horse drawn carriage had its wheel width taken back from the size of tracks on the roads/paths of the day.
These track sizes on roads and paths have been around for many hundreds of years, in fact they were origionally designed to a standard size to take chariots.
Chariots... who was the first major nation to use chariots? The Roman Empire!!!
so in 2500 years the best transportation that we can come up with is limited by the size of something that leads all the way back to the Roman Empire! Aren't we so advanced? or was it they that were advanced?

Sorry, that's an urban legend:

http://www.snopes.com/history/american/gauge.htm

including the bit about the most modern form of transportation being dictated by Roman technology....

signed,
YYZ "spoilsport" YYT
 
vikkyvik
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RE: A380 Vs 777 Engine Size

Wed Mar 22, 2006 7:31 pm

Quoting Don81603 (Reply 21):
One of the workers commented that "you could pass the fuse of a 737 through the engine nacelle of this beast."

That question has been asked a lot, and is (unfortunately) not true. I don't feel like looking up the specifics (I've done it enough), but the 737's fuselage diameter is about a foot larger than the GE-90's cowling diameter.

It's still a huge engine!

~Vik
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bongo
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RE: A380 Vs 777 Engine Size

Wed Mar 22, 2006 11:57 pm

MDE: First airport in the Americas visited by the A380!
 
don81603
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RE: A380 Vs 777 Engine Size

Sat Mar 25, 2006 11:45 am

Quoting Vikkyvik (Reply 23):
It's still a huge engine!

Huge doesn't begin to describe it! At the time, I'd never even heard of the T7, so when the foreman said that you could fit the 737 through the nacelle, it looked possible, so I believed him.
Eagles may soar, but weasels don't get sucked into jet engines.
 
darkblue
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RE: A380 Vs 777 Engine Size

Tue Mar 28, 2006 9:33 am

Quoting Vikkyvik (Reply 23):
That question has been asked a lot, and is (unfortunately) not true. I don't feel like looking up the specifics (I've done it enough), but the 737's fuselage diameter is about a foot larger than the GE-90's cowling diameter.

Yeah, I don't recall the specifics either, but I think this myth comes from the fact that a 737/727 interior width is about the size as the GE90 nacelle outer diameter. Around 135" I believe. But yes, the outer diameter of a 737/727 is about a foot larger.

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