cenci
Posts: 11
Joined: Wed Feb 07, 2001 9:35 pm

GE90 V RR Trent Help ME Please!

Wed Feb 07, 2001 9:46 pm

i am a student working on a comparision project for the GE90-94B and the Rolls Royce trent 895 and have been asked to select the best choice for the 777. please help me gather info on performance, cost, reliability and any other usefull info on the engines as i have written and surfed all day but to no avail! my contact email is richardcenci@hotmail.com and i would appreciate any useful data or your opinions many thanks rich
 
Guest

RE: GE90 V RR Trent Help ME Please!

Wed Feb 14, 2001 4:41 am

The 95,000lb thrust RR Trent 895 is a 3-spool designed engine with 100% lightweight titanium fan blades. The 94,000lb thrust GE90-94B is a 2-spool designed engine with composite fan blades with titanium edges for protection against foreign objects that the engine might injest. British Airways ordered on their last batch of new 777-200ERs the RR Trent 895.
 
raggi
Posts: 879
Joined: Mon Oct 23, 2000 4:34 am

RE: GE90 V RR Trent Help ME Please!

Thu Feb 15, 2001 1:56 am

The GE engine has a higher bypass-ratio, is bigger, more fuel efficient, but weighs more than the Trent.
Customers for the GE90-94B so far are Air France
( launch customer and -operator ), Alitalia and JAL.
Tedski`s right about the titanum fan blades...
Stick & Rudder
 
F-WWAI
Posts: 129
Joined: Thu Dec 30, 1999 7:41 am

RE: GE90 V RR Trent Help ME Please!

Sat Feb 17, 2001 1:33 am

You are up with a very difficult task if you want to do it at your school.
You actually need information from Boeing about the aircraft and from each engine manufacturer about their engine. The best would be you position yourself with that job inside Boeing where all that information is available. Why do you not just ask for a student practiceship there, ewplaining what you want to do?
all the best,
FW
 
jkelley480
Posts: 119
Joined: Tue Feb 01, 2000 10:03 am

RE: GE90 V RR Trent Help ME Please!

Sat Feb 17, 2001 4:11 pm

I was going to ask why you did not include P&W in your comparison, but you'll have enough work with just 2 types!
 
Guest

RE: GE90 V RR Trent Help ME Please!

Sun Feb 18, 2001 9:51 am

Also, don't forget, for airlines who want to expand with the 777-200LR and 777-300ER, the GE90 has been selected to power the aircraft. So, airlines planning to expand operations, the -90 might be a good choice.
-Tom
 
Guest

RE: GE90 V RR Trent Help ME Please!

Tue Feb 20, 2001 9:14 am

What is the difference between the 777-200ER and 777-200LR? If they are almost the same in size, why couldn't Boeing offer the same lightweight 100% titanium fan bladed P&W 4000 and RR Trent 800 series engines on the LR model as the ER and offers only the heavy composite fan bladed GE90?
 
Guest

RE: GE90 V RR Trent Help ME Please!

Tue Feb 20, 2001 11:11 am

Have you started with Janes or Brasey's Aircraft books? I think they are excellent references.
 
dynkrisolo
Posts: 1825
Joined: Mon Feb 12, 2001 12:12 am

RE: GE90 V RR Trent Help ME Please!

Tue Feb 20, 2001 11:17 am

Light weight titanium and heavy composite blade??? FWIW, the density of the GE90 fan blades is smaller than that of the PW4000 or Trent fan blades.
 
Guest

RE: GE90 V RR Trent Help ME Please!

Tue Feb 20, 2001 11:27 am

What I meant was that the GE90 engine itself was heavy not the composite fan blades.
 
dynkrisolo
Posts: 1825
Joined: Mon Feb 12, 2001 12:12 am

RE: GE90 V RR Trent Help ME Please!

Tue Feb 20, 2001 11:32 am

If they burn the same amount of fuel, then the heavier engine will definitely have the disadvantage. In this case, the GE90 burns less fuel than either the PW4000 or the Trent 800. As a result, for long-range operations, the GE90 has the advantage in spite of its heavier weight.
 
cenci
Posts: 11
Joined: Wed Feb 07, 2001 9:35 pm

RE: GE90 V RR Trent Help ME Please!

Thu Feb 22, 2001 8:01 pm

basically i am a student working for British Airways, thats why i havent included the PW 4000 in my comparison.
although i will probably mention it in my final report the main aim is to chose the best suitable engine from the selection BA already have i.e. the GE90 and RRTrent.

Anyway, i seemed to have found a fair bit of info on the internet but am having some problems with in depth stuff so anyone with any leads on cost, performance, reliability etc please get in touch

Thanks!

richardcenci@hotmail.com
 
Guest

RE: GE90 V RR Trent Help ME Please!

Sun Mar 04, 2001 9:38 am

One factor in the RR-PW-GE battle for engine dominance
which is not technical has been the commercial behavour of GE when it saw that RR was pulling ahead in market share terms.
The Airlines, even American, had come to the conclusion that RR was the best whole life cycle and lowest technical risk.
GE responded by doing a deal with Boeing that froze RR out of the 777-200X and 777-300X programme. Boeing may have regretted that move subsquently.
This move by GE perhaps is the biggest endorsement of RR. Also I think RR may have the inside on carbon fibre fan blades that even 3D computer simulation and design
cannot replace
 
B787
Posts: 149
Joined: Mon May 09, 2005 7:06 pm

RE: GE90 V RR Trent Help ME Please!(777-200ER/LR)

Mon Mar 05, 2001 3:10 am

The LR is the new LongerRange version of the 200ER, to go farther you need more fuel, more fuel means higher MTOW, Higher MTOW means BIGGER engines, the RR and P&W engines were tapped out trying to get into the 100,000 lb thrust class, GE had more room to grow, but to make the investment in the 115,000 engines they didn't want to get killed by the competition between 3 engine companies where they all are giving away their engines and making it up on spares. RR and P&W didn't want to make the same investment to build a 115,000lb thrust engine.

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