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764LR Engine Development Question.

Mon Jan 22, 2001 11:21 am

The 764LR will be powered by the new engine under development by Engine Alliance (GE/PW), which will also power the 74X, A380. I have asked why GE and PW are teaming up on this, and the responses were to save money. Now I wondered why dosent Boeing just use an uprated P+W4000. The 4000 can easily handle the increase, its already powereing 777s and A330s. Why would they use such a powerful engine such as the TP7000?
Thanks, Tom
 
steman
Posts: 1441
Joined: Wed Aug 09, 2000 4:55 pm

RE: 764LR Engine Development Question.

Mon Jan 22, 2001 6:48 pm

Hi TOM,
the General Electric/Pratt & Whitney Engine alliance was formed to produce the brand new family of turbofan named GP7000 (not TP7000) to be offered for the Airbus A3XX ( now A380) as well as Boeing 747X.
They will have thrust in the region of 30,000 Lb that's to say they will fill the gap between the GE CF6-80 series and PW 4056/4162 and the GE 90 and PW 4090 series.
So it will be perfect to power the IGW version of the 767-400ER while both the GE90 and the PW4090 would be too big, heavy and powerful, needing a redesing of wing, undercarriage and so on.

I hope this helps

Stefano
 
steman
Posts: 1441
Joined: Wed Aug 09, 2000 4:55 pm

RE: 764LR Engine Development Question.

Tue Jan 23, 2001 4:54 pm

Hi,
last night I realized that in the previous post I wrote that the GP7000 will have an average thrust of 30,000 Lb: well, I meant 30,000 Kg, 70,000 Lb.
Sorry

Stefano
 
Guest

Steman

Wed Jan 24, 2001 8:49 am

Thanks Steman,
What I mean is that, theres already a PW4000 powering aircraft of size from the 767 to the 777. The 764 will be inbetween the 762-777. The PW4000 obviously has enough power to power the 764 if it powers the 777, so why not just use a 4000? I mean to attract airlines for commonality with their 762/763s. Although the GP7000 will have some commonality with the 4000 being based on that existing engine, and sharing a common design.
-Tom

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