Subscription required
By Bjorn Fehrm
May 2, 2024, © Leeham News: We are doing an article series comparing the capabilities of the Airbus A350-1000 and the Boeing 777-9. We looked at the development history of the aircraft and then their capability and fuel economics.
We could see that the 777-9 is trailing the A350-1000 in payload range, partly because we compare the base version of the 777-9 with a further developed A350-1000. Now, we investigate what the 777-9 performance would be should we include a typical future development of the Maximum TakeOff Weight (MTOW).
April 26, 2024, ©. Leeham News: We do an article series about engine development. The aim is to understand why engine development now dominates new airliner development when it comes to the needed calendar time and risks.
To understand why engine development has become a challenging task, we need to understand engine fundamentals and the technologies used for these fundamentals.
We discussed geared versus direct-drive turbofans last week. Now, we’ll examine some design problems for these engines.
Subscription required
By Bjorn Fehrm
April 10, 2024, © Leeham News: We are doing an article series comparing the capabilities of the Airbus A350-1000 and the Boeing 777-9. The A350-1000 has not been a hot seller, and a lot of analysts asked why. Is there a capability gap or what is the reason?
At the same time, the reworked Boeing 777X had reassuring initial sales at the November 2013 launch at the Dubai Air Show, where Emirates ordered 150 777-9 out of a total show orderbook of 259 aircraft for Emirates (150), Qatar (50), Lufthansa (34), and Ethiad (20). The orders have since grown to 481 as of late 2023.
The A350-1000 has had a recent resurgence in orders and switches from the A350-900 orders, whereas the 777–9 has seen several delays due to engine and certification problems and is now scheduled for 2025 delivery instead of 2020.
Does the 777-9 or the A350-1000 hold the upper hand in a long-term race between the largest widebodies after the Airbus A380 and Boeing 747-8i stopped deliveries? We use our Aircraft Performance and Cost model to compare the two to understand their present performance and potential for upgrades.
Subscription required
By Bjorn Fehrm
April 4, 2024, © Leeham News: Korean Air confirmed an order for 33 Airbus A350 in the week, 27 of which are the larger A350-1000. The order is significant on two accounts:
First, 27 A350-1000 and only 6 A350-900, where analysts have for years asked why the -1000 isn’t selling.
Secondly, for a carrier that has a rather 50-50 fleet of Airbus and Boeing planes, its large widebody was the Boeing 777-300ER, whereof it has 27 out of 37 Boeing 777 in total. Korean Air now chooses the A350-1000 to replace the 777-300ER. Why not the 777-9?
Was this a question of availability (the 777-9 should have been delivered in 2020 but has had several delays; the present plan says 2025), or was there a technical-economic reason for Korean Air’s decision? We examine the characteristics of the two planes to find the answers.
March 29, 2024, ©. Leeham News: We finished our article series about New Aircraft Technologies last week. It dealt with the different new technologies that a next-generation airliner could use to increase efficiency and by it environmental emissions.
An area that we touched upon but didn’t dig deeper into was engine development. When airframe development historically decided how long a new generation of aircraft took to develop, it gradually changed to engine development being the more calendar-time-consuming and riskier development for the last generations. This article series will discuss why and what can be done about it.
Subscription required
By Bjorn Fehrm
December 21, 2023, © Leeham News: We are looking at a re-engine of the 767, a move that Boeing is considering to avoid a production stop after 2027. The present 767 engines don’t pass emission regulations introduced by the FAA, EASA, and other regulators for production and delivery beyond 2027.
We looked at what airframe modifications are necessary to house more efficient engines last week; now, we use our Aircraft Performance and Cost model to look at the economics of the original 767 versus a re-engined one.
Subscription required
By Bjorn Fehrm
December 14, 2023, © Leeham News: We are looking at a re-engine of the 767, a move that Boeing is considering to avoid a production stop after 2027. The present 767 engines don’t pass emission regulations introduced by FAA, EASA, and other regulators for production and delivery beyond 2027.
We have described the history of the 767 and the key data of the different variants in last week’s article. Now, we look at what airframe modifications are necessary to house more efficient engines and what consequences these bring.
Subscription required
By Bjorn Fehrm
December 7, 2023, © Leeham News: We wrote last week that Boeing is considering re-engining the 767 to avoid a production stop after 2027. The 767 is still an interesting aircraft for companies flying cargo and for the US Air Force, which is taking delivery of the tanker version KC-46A for years to come.
The problem is that all the 767 versions are using engines from the 1970s (GE CF6, PW4000, RB211), and as the FAA has accepted the ICAO emission rules from 2017, the production of the 767 with these engines has to stop after 2027. As reported last week, Beoing is looking at re-engining the 767 to avoid a production stop.
We use our Aircraft Performance and Cost Model (APCM) to look at the different possible configurations with new engines and model their performance data and operating economics.
Editor’s Note: As Airbus and Boeing consider new airplanes, their current generation aircraft are plagued with technical issues. The engines on the A320neo and 737 MAX families continue to have problems years after entry into service. The Boeing 787, which had ground-breaking technology when it was designed, has production issues. Flight testing early on revealed technical problems with the engine on the 777X, prompting the president of Emirates Airline to publicly suggest he won’t accept delivery until the engines are fully “mature.”
Aviation Week’s Check 6 podcast last week examined Boeing’s path toward a new airplane. Boeing CEO David Calhoun insists on waiting for new technology. But “new technology,” while in theory is a great idea, the phrase also scares people. LNA reported on this in March 2020. We’re reposting this article from then.
Related Stories
Now Open to All Readers
Subscription Required
By Scott Hamilton
March 16, 2020, © Leeham News: “I can tell you from our perspective, we’re kind of sick and tired of new, new technology. It’s not proven to be the home run.”
This blunt assessment comes from the chief executive officer of the big aircraft lessor, Avolon.
Domhnal Slattery, the CEO, was giving his critique of whether Boeing should launch a new airplane once the 737 MAX crisis is over. (Update: Since this interview, Slattery retired from Avolon.)
Boeing was on a path to decide whether to launch the New Midmarket Airplane when the MAX was grounded one year ago this month.
Airbus was waiting for Boeing to move before deciding how to respond.
By Scott Hamilton
June 18, 2023, © Leeham News: Boeing and GE Aerospace agreed to send a 777-9 to Dubai next year for about two months of route proving for its largest 777X customer, Emirates Airline.
LNA confirmed the plan on the sidelines of a Boeing event today in conjunction with the Paris Air Show that officially begins tomorrow.
The airline’s president, Tim Clark, has developed a deep skepticism over the pace of the program, which has been hit by repeated delays for a variety of technical and regulatory reasons. The program was launched in 2013, with Lufthansa Airlines, Emirates, Etihad Airways and Qatar Airways as launch customers. Emirates was supposed to receive the first airplane as early as December 2019. Now, Boeing forecasts the first delivery in 2025. Clark is said to be concerned that the delivery will slip to 2026.
Emirates has 115 777Xs on order.
Technical issues with the giant GE9X engine early in the flight testing forced a delay while engines were returned to GE for analysis, fixes and repairs. Then certification work on the program got caught up in the certification crisis of the 737 MAX program following two crashes in October 2018 and March 2019. Global regulators grounded the entire MAX fleet for what became 21 months.