Schorsch
Alien
Airbus und Boeing denken momentan sehr laut über ein Update ihrer Brot&Butter Flugzeuge nach. Es sollen neue Triebwerke genutzt werden, namentlich der CFM56 Nachfolger LeapX und eine Version des PW1000G von Pratt & Whitney.
Dazu Nachricht von Boeing:
Kurz & Deutsch:
Neue Triebwerke sollen den Verbrauch senken, EIS Richtung 2015. Airbus wird vielleicht schon in naher Zukunft entscheiden. Airbus möchte das PW-Triebwerk gerne über das Konsortium IAE haben, welches momentan das V2500 als Alternative zum CFM56 liefert (und dabei nicht so erfolgreich ist).
Meinungen?
Kommentare?
Meine Meinung:
Airbus wird wohl einen A320NG rausbringen, bei Boeing sind die technischen Schwierigkeiten größer, vornehmlich wegen der geringeren Bodenfreiheit. EIS des neuen A320 würde mit dem von C919 und MS21 zusammen fallen, und somit denen das Wasser auf den traditionellen Märkten abgraben.
Dazu Nachricht von Boeing:
http://www.flightglobal.com/articles/2010/03/18/339640/boeing-must-resist-requirements-creep-on-re-engining-737.htmlAs it moves closer to a decision on re-engining the 737, Boeing Commercial Airplanes CEO Jim Albaugh says his company must resist the urge to modify the 737 too much.
"You've got to watch out for the requirement creep. Our engineers would love to put every bell and whistle on this airplane that they know of, we have to resist that," says Albaugh.
"I will do everything I can to reduce the requirements creep, so it doesn't become an equivalent of a major change to the aircraft, and we certainly don't want it to become a new airplane. When we do a new airplane we want to bring the right technologies to it, which will really give us a leap over what we've built today."
For example, adding 787-style avionics and flight deck to the 737, while potentially desired by Boeing's customers, would serve to drive up the development cost and price of the re-engined aircraft.
"It's really driven by the technology that's available and can you close the business case for a re-engining," says Albaugh.
Other issues to consider include how long a production line would be in place for a re-engined 737 and then also understanding when new tehcnology might come along that "would really drive you towards a new airplane".
Albaugh adds that the re-engining question is a "very complex algorithm" that takes into account the dispatch reliability of an existing airframe with a new engine, as well as any maintenance implication of airlines introducing of a new 737 model along side Next Generation and Classic 737s, as would be the case with Southwest Airlines.
"It's not as easy to just say, you can get 10-15% efficiency, let's go do it," he says.
"One thing I've learned that there's nothing simple about a derivative airplane. There's certainly nothing simple about a re-engine. If you did a re-engine the pylon would change, the empennage would change, you'd have to raise the front gear a little but, drive some different loads into the airplane, drive some different loads into the wing."
Additionally, Boeing has begun wind tunnel tests on various designs for a re-engined 737, evaluating the aerodynamic characteristics of a larger engine, as well as a modified strut and pylon.
Albaugh says he holds weekly Friday meetings to discuss the progress on the re-enginging studies.
Boeing expects a re-engining decision to come in the latter part of this year.
http://www.flightglobal.com/articles/2010/03/15/339472/leahy-supplies-details-of-possible-re-engined-a320.htmlAirbus COO of customers John Leahy stresses that evaluations of a re-engined A320 are continuing, but, if the programme is launched, the aircraft will be "an option to the existing airplane".
Speaking at the ISTAT annual conference in Orlando, Florida, Leahy says if Airbus chooses to re-engine the A319/A320/A321 product line with new engine offerings from CFM and International Aero Engines, the aircraft will feature sharklets and will likely need a strengthened wing.
Airbus management expects to receive a report by the end of April from 14 engineering teams currently studying various impacts of re-engining including the impact on the leading edge of the wings and thrust reversers.
Leahy warns that Airbus rival Boeing would make a huge mistake to announce a new narrowbody clean sheet design if Airbus unveils a re-engine scheme.
If Boeing were to introduce a new aircraft in the 2017 or 2018 timeframe, Leahy believes the aircraft would only slightly modify current technology, and wouldn't have the 20-30 year staying power necessary to ensure commercial success of an aircraft programme.
Leahy is holding high-level meetings this week to continue discussions of the re-engine, and says if Airbus firms up plans to launch the product, it would be introduced as an option for customers at the end of 2015.
The Airbus executive continues to press IAE partners Pratt & Whitney and Rolls-Royce to resolve their philosophical difference and offer an engine for a re-engined A320 with their consortium partners MTU and Japanese Aero Engines.
Airbus has no interest in a stand-alone offering by Pratt & Whitney of its PW1000G geared turbofan scheduled to power the Bombardier CSeries, the Mitsubishi MRJ and the Irkut MS-21.
"We want the two [P&W and R-R] to sit down and iron out their differences," says Leahy, who adds "if Pratt and IAE can't get their act together, they can't get their act together."
P&W has recently said if it can't come to terms with its IAE partners, it is willing to go alone in offering the PW1000G on the re-engined and new narrowbody designs.
Kurz & Deutsch:
Neue Triebwerke sollen den Verbrauch senken, EIS Richtung 2015. Airbus wird vielleicht schon in naher Zukunft entscheiden. Airbus möchte das PW-Triebwerk gerne über das Konsortium IAE haben, welches momentan das V2500 als Alternative zum CFM56 liefert (und dabei nicht so erfolgreich ist).
Meinungen?
Kommentare?
Meine Meinung:
Airbus wird wohl einen A320NG rausbringen, bei Boeing sind die technischen Schwierigkeiten größer, vornehmlich wegen der geringeren Bodenfreiheit. EIS des neuen A320 würde mit dem von C919 und MS21 zusammen fallen, und somit denen das Wasser auf den traditionellen Märkten abgraben.