King767 From , joined Dec 1969, posts, RR: Posted (13 years 7 months 1 week 6 days 1 hour ago) and read 821 times:
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?
Steman From Germany, joined Aug 2000, 1381 posts, RR: 7
Reply 1, posted (13 years 7 months 1 week 5 days 17 hours ago) and read 786 times:
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.
King767 From , joined Dec 1969, posts, RR:
Reply 3, posted (13 years 7 months 1 week 4 days 3 hours ago) and read 747 times:
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.