Astuteman From United Kingdom, joined Jan 2005, 10367 posts, RR: 97 Posted (9 years 9 months 4 days 20 hours ago) and read 5391 times:
My understanding is that these engines (GEnx for certain), are being developed for thrusts up to 75 000 lb, and with the A350 "growing" all the time, it's likely that they will actually get built at this thrust, if not higher.
It seems to me that this places these engines squarely in the thrust range for the A380 - even the possible 590t-600t HGW version.
Others on the forum may help me on this one, but I would guess (and it is a guess) that GEnx/Trent 1000, with higher BPR, slower turning main fans (for Trent for certain) etc. etc would be 3% - 5% more efficient than even the relatively recent Trent 900/GP7200 engines currently on the A380.
Being 112" fans as opposed to 116" fans they will also be lighter, and have less drag on the wing.
How difficult would it be to certify these engines for the A380?
Would this be a sensible thing to do?
Would it be too costly?
If my guesses are anything like near the mark, these engines could increase the range of the A388 from c8000 miles to c8400-8500 miles - a considerable improvement.
Possibly an even greater benefit, though might be complete commonality with the A350 for fleet decisions (a benefit shared by the 787/747ADV)
On a lighter note, if the A388 could reach 8500 miles or so with these engines, it might open the way for the A388 HGW version to challenge the 772LR for the title of the world's longest range aircraft.
550 passengers and 9500 miles - all the plane you'll ever need.......
Seriously, though, would this engine certification be a sensible consideration for Airbus, or is it just pie-in-the-sky from my fertile imagination?
DfwRevolution From United States of America, joined Jan 2010, 1013 posts, RR: 51
Reply 2, posted (9 years 9 months 4 days 20 hours ago) and read 5352 times:
Quoting Astuteman (Thread starter): A388 HGW version to challenge the 772LR for the title of the world's longest range aircraft.
Probably not... the 777-200LR with zero auxillury fuel tanks installed should have a still air range around 8,600-8,800 nautical miles. With all optional tanks installed, the 772LR will have 9,420 nm of range with payload.
The GEnx is not radically more efficent than the A380 powerplants, which were only developed and certified in the last 5 years themselves. At least, not enough to extend the A380's range by 1,000 nautical miles.
Quoting Astuteman (Thread starter): Seriously, though, would this engine certification be a sensible consideration for Airbus, or is it just pie-in-the-sky from my fertile imagination?
Pie in the sky... Airbus and engine manufactues have already invested heavily in the Trent 900 and GP7000. They need return from those projects.
So fast is the pace of engine development today that the Engine Alliance is already anticipating the retrofit of new technology in the GP7200 in around five years’ time — and the engine isn’t even in service yet.
“I would absolutely expect the GP7200 (it will power the Airbus A380) to have a performance improvement around then” using technology from the GEnx engine being developed for entry into service on the Boeing 787 in 2008, says Engine Alliance president Bruce Hughes.
E volavo, volavo felice più in alto del sole, e ancora più su mentre il mondo pian piano spariva lontano laggiù ...
Airmansv From United States of America, joined Apr 2005, 12 posts, RR: 0
Reply 5, posted (9 years 8 months 2 weeks 19 hours ago) and read 4737 times:
The GP7000 engine for the A380 is jointly made by Pratt & Whitney and GE. Technologies developed by both manufacturers as appropriate are incorporated and it benefits from the best from the two companies.