deltajet757
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SQ's Newest 773/ER With GE Engines Not RR Why?

Wed Oct 04, 2006 1:51 pm

I was just looking through the SQ 777 pictures and there are some new ones taken today actually(10/3/06), and I noticed that SQ's newest T7 (9V-SWA) has the GE 115B engines instead of the RR's. Why did SQ order new 773/ER's with GE engines instead of the RR engines? My gues would be for better range and fuel econ on long hauls. What do you think?


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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Wed Oct 04, 2006 1:52 pm

Unfortunately, Boeing for a strange reason only allowed GE to be the exclusive supplier of engines for the B77W / B772LR.
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jacobin777
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Wed Oct 04, 2006 1:54 pm

Quoting Singapore_Air (Reply 1):
Unfortunately, Boeing for a strange reason only allowed GE to be the exclusive supplier of engines for the B77W / B772LR.

It wasn't a strange reason..GE took the biggest risk as a risk sharing partner (over Rolls Royce)..and Boeing chose to go with them..turned out to be a good deal, as the GE engines for the 773ER, 772LR have turned out to be better than anticipated (even with the recent situation)...

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jben
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Wed Oct 04, 2006 1:55 pm

It's not strange at all. Boeing wanted a risk sharing partner... and GE said yes. But, as he says, the GE90-115B is the only engine available for the 773ER and the 110/115 are available for the LR.
 
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Wed Oct 04, 2006 2:01 pm

One simple reason, because the big bad boy GE115 is the only engine on offer for the B773ER, same with the B772LR
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deltajet757
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Wed Oct 04, 2006 2:01 pm

Quoting Singapore_Air (Reply 1):
Unfortunately, Boeing for a strange reason only allowed GE to be the exclusive supplier of engines for the B77W / B772LR.

That's odd. Although I think the GE's look better on the T7. If you look at the 764's engines they make the A/C look underpowered because of their size and the same thing with the RR engines on the T7's. The RR's are a bit smaller in diameter so they too make the T7 look underpowered in my opinion. Anyway that's off subject.

I took a look at the Boeing website and there's a news release from 2004 stating SQ bought 18 773/ER's. It also said the A/C are powered by the GE90-115B engines not why.

Here's the link: http://www.boeing.com/commercial/777...amily/news/2004/q4/nr_041209g.html

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captaink
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Wed Oct 04, 2006 2:32 pm

YOu know, I tend to look at thiings like engines, but usually notices differences in terms of the cones at the back, you konw ej in the case of A320, the IAE and CFM powered birds have very distinct looking engines. Can someone show me the difference on the T7s?
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richardlu
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Wed Oct 04, 2006 8:37 pm

Assuming that you cannot see the fan,

GE90 engines are the biggest of them all, and usually the area between the thrust reversers and engine cone is extremely clean.

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RR engines have the smallest diameter and hence look "longer". The same area usually becomes brown after some time.

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For PW4000, the diameter is between the GE and the RR. The same area also usually becomes brown, but you can see the two "plates" there.

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If you can see the fan, it would be quite obvious by looking at the centre. GE90 has a round centre with a short white spiral. RR has a cone centre with a spiral throughout the cone. PW has a round centre with only a single white line along its radius.

Also, the GE90 is the only engine with a titanium/composite blades, where the GE90-11X is the only one that has swept blades. The other two have all-titanium normal wide-chord baldes.
 
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Wed Oct 04, 2006 9:21 pm

I don't think a Trent engine has demonstrated the ability to produce sufficient thrust to power a 77W in engine out situations, a la the ~115k range. I may be wrong though... I don't know why they would, as after they lost the contract, there would be no need to continue the investment in the technology. It seems unlikely we will see a need for engines in this thrust range based on traditional architechture. It seems the closest will be the new Trent XWB which will be much less powerful... even though the A350-1000 isn't that much smaller than a 77W. Go figure!
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Rj111
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Wed Oct 04, 2006 9:43 pm

The Trent 8104 has demonstrated up to 117klbs thrust. Though RR weren't particularly willing to become a risk sharing partner for the 777LR program and subsequently GE got the contract.
 
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Wed Oct 04, 2006 11:52 pm

Quoting RJ111 (Reply 9):
The Trent 8104 has demonstrated up to 117klbs thrust. Though RR weren't particularly willing to become a risk sharing partner for the 777LR program and subsequently GE got the contract.

If I remember right, they demonstrated the power level, but they likely would have only drawn orders from traditional RR customers, since their SFC story would not have been nearly as good as GE's. They were pushing the Trent 800 up past it's designed growth goals...which admirably, it did! None the less though, the GE90 was simply being scaled up to it's "sweet spot", so it got harder for the RR to compete on operating parameters. Different design goals and philosophies, really...part of the reason the GE90 was considered a bit of a dog on the <90k/lbs configurations, but the Trent was the gold standard. This is all academic at this point though.

The interesting point is that RR still could have sold dozens simply because they inspire such customer loyalty.
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warreng24
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Thu Oct 05, 2006 12:12 am

Quoting DeltaJet757 (Reply 5):
If you look at the 764's engines they make the A/C look underpowered because of their size and the same thing with the RR engines on the T7's.

RR engines do not power any model of the 764.
 
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Thu Oct 05, 2006 12:14 am

Quoting Richardlu (Reply 7):

THanks man.
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RE: SQ's Newest 773/ER With GE Engines Not RR Why?

Thu Oct 05, 2006 3:08 am

Quoting Warreng24 (Reply 11):

RR engines do not power any model of the 764.

I think DeltaJet757 is referring to the GE engines on the 767-400ER, and the RR engines on the 777. He said that the 777 with RR Trent engines make it look underpowered, just like the GE CF6-80C2 engines on the 767-400ER.
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