Leeham News and Analysis
There's more to real news than a news release.
Leeham News and Analysis
- The Boeing 767 Cross Section, Part 1 November 24, 2022
- Movie Review: Devotion November 21, 2022
- China will accelerate development of its commercial aerospace sector November 21, 2022
- Bjorn’s Corner: Sustainable Air Transport. Part 46. eVTOL comparison with helicopter November 18, 2022
- The economics of a 787-9 and A330-900 at eight or nine abreast November 16, 2022
Engine Development. Part 2. The early jet engines.
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By Bjorn Fehrm
Introduction
August 25, 2022, © Leeham News: Last week, we started a series about jet engine development for our air transport aircraft. The jet engine came to replace the piston and gas turbine propeller engines when airplanes sought higher cruising speeds.
In the second part of the series, we look at why the jet engines were developed and their advantages and disadvantages compared to what they replaced.
De Havilland Comet, the first jet airliner. Source; Wikipedia.
Summary
- When the propeller engine came to its speed limits, the straight jet engine was the answer.
- While it helped with speed, it created other problems.
Orders at Risk: Summer 2022 Snapshot
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By Vincent Valery
Introduction
Aug. 22, 2022, © Leeham News: The ink has now dried on the orders signed at the 2022 Farnborough Air Show. Boeing announced more orders than Airbus, mainly because of a sold-out A320 production line well into the future. Airbus also announced orders shortly before and after the Air Show.
Credit: Airbus
Airbus and Boeing also disclosed their second quarter of 2022 earnings and July orders and deliveries, the first post-Farnborough update. OEMs are more likely to reassess the quality of their order books before disclosing future earnings.
Airbus and Boeing have outstanding orders with airlines where there is a material probability some orders won’t translate into deliveries. Most were the result of airlines encountering financial difficulties, but some were related to contractual disputes. Boeing flags such orders as subject to an ASC 606 accounting rule adjustment.
Unlike Boeing, Airbus isn’t subject to an accounting rule like the ASC 606 adjustments. Therefore, the European OEM does not break down the orders at risk of cancellation by the program. Airbus only discloses the nominal value of its total adjusted order book in its annual report.
LNA analyzed July 2020, November 2020, August 2021, and February 2022 Airbus’ and Boeing’s order books to identify orders at risk and come up with an apples-to-apples comparison. We update this analysis with the latest order books from both OEMs. The above links explain our methodology and its differences with Boeing’s ASC 606 adjustments.
Summary
- Lingering order book cleanup for older programs;
- The Boeing-China factor;
- A healthier single-aisle Boeing order book;
- Updates on the A330neo and large twin-aisle aircraft order books;
- One aircraft variant stands out.
Pontifications: Heros and a thriller–two book reviews
Fly Boy Heroes, The Story of the Medal of Honor Recipients of the Air War Against Japan
By James H. Hallas. Stackpole Books, $29.95.
The First Counterspy
By Kay Haas and Walter W. Pickut. Lyons Press, $29.95.
Aug. 22, 2022, © Leeham News: Two books from my summer reading aren’t about commercial aviation but will be interesting to the broader aviation community.
These are Fly Boy Heroes, The Story of the Medal of Honor Recipients of the Air War Against Japan, and The First Counterspy.
Fly Boy chronicles short stories about the US Medal of Recipients who flew against Japan in the Second World War. Author James Hallas begins with the Japanese air raid on Pearl Harbor and ends with an April 12, 1945, Boeing B-29 raid on Japan. In between, the Doolittle Raid on Tokyo in April 1942, the Battle of the Coral Sea, Midway (the outgrowth of the Doolittle Raid), and other combat missions are recounted. The Medal of Honor recipients of these battles are, as the book’s title suggests, the flyboys whose above-and-beyond exploits earned them the Medal. Not all survived their missions, but some did. For those who did, not all had happily ever after endings late in the war or in civilian life.
Being a Chicago area native, I knew that O’Hare International Airport was named after Lt. Commander Edward O’Hare, more commonly known as “Butch.” I also knew, though few others today might, that Butch was the son of Chicago mobster Edgar J. O’Hare, or E. J. E.J. was a lawyer for Al Capone and testified at Capone’s tax evasion trial that sent the mobster to Alcatraz. For his troubles, E.J. was murdered in 1939.
Bjorn’s Corner: Sustainable Air Transport. Part 33P. eVTOL batteries. The deeper discussion.
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August 19, 2022, ©. Leeham News: This is a complementary article to Part 33, eVTOL batteries. It discusses the trickiest system on an eVTOL, the battery system.
While Lithium Ion batteries have come a long way since the electric flight ideas took off in 2015, the battery system is still the biggest challenge for eVTOL designers, not only for total energy content but for a range of parameters.
Bjorn’s Corner: Sustainable Air Transport. Part 33. eVTOL batteries.
August 19, 2022, ©. Leeham News: This is a summary of article Part 33P, eVTOL batteries. This article discusses the trickiest system on an eVTOL, the battery system.
The battery system supplies the energy to the VTOL, and given today’s and tomorrow’s battery technology; it’s a tight resource that needs a lot of pampering.
Figure 1. We use graphs in the Pipistrel spare parts catalog to show the battery system of the Pipistrel Velis Electro. Source: Pipistrel and Leeham Co.
Engine Development, Part 1: Launch to Entry into Service
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By Vincent Valery
Introduction
Pratt & Whitney Geared Turbofan
Aug 18, 2022, © Leeham News: LNA analyzed the evolution of commercial aircraft development timelines last month. The time between a program launch and entry into service significantly increased over time, including for derivatives.
The increase in development time is primarily the result of more complex and safer airplanes. Introducing new materials, notably a more extensive use of composites, also explain longer development timelines.
LNA now starts a new series on the topic of commercial aircraft jet engines. The goal is to go through significant innovations from the beginning of the jet age.
This first article analyses whether engine development time between launch and entry into service increased significantly over time.
Summary
- Military development led to the first commercial jet engines;
- The divergence between military and commercial programs;
- Pushing the envelope of the same fundamental engine architecture;
- Harder to identify development timeline evolution.
Pontifications: Airbus nears 800 sales for A220, but major challenges continue
Aug. 15, 2022, © Leeham News: Airbus now has nearly 800 orders for the A220, but the program is years from profitability and production faces supplier challenges like those facing the Airbus A320neo and Boeing 737 MAX.
Airbus A220-300. Credit: Leeham News.
Passenger experience easily exceeds the older design A320 and 737. The A220’s 2×3 seating, 18.5 inch window/aisle seats, 19-inch wide middle seat and wide aisle draw kudos. The windows are larger than the older airplanes. Economics are better than promised by Bombardier, which designed the airplane as the C Series.
Exiting Commercial Aviation
By Scott Hamilton
Development costs, neglect of the Bombardier Q400 and CRJ programs and concurrent development of two new corporate jets nearly bankrupted Bombardier. To save itself, Bombardier exited commercial aviation and killed one of the two corporate jet developments. The Q400 program was sold to Longview Aviation, which rebranded the turboprop its original name, the Dash 8-400, and adopted the legacy company name, De Havilland Canada.
The CRJ program was sold to Mitsubishi Heavy Industries. MHI had little interest in the CRJ regional jet. Interest was in acquiring the CRJ global product support and MRO system as a groundwork for the M100 SpaceJet it was developing. (MHI later changed CEOs in its policy of rotating the leadership. The new leaders killed the SpaceJet program, the reason for buying the CRJ in the first place.) MHI last year seriously considered restarting production of the CRJ. This idea was abandoned only last month.
The C Series was sold to Airbus in 2017, the first of Bombardier’s commercial programs to go. The impetus was a complaint filed by Boeing with the US Department of Commerce in 2017. While Commerce was assessing the complaint, Bombardier agreed to sell 50.1% of the program to Airbus. BBD was committed to fund construction of an assembly plant at Airbus’ Mobile (AL) complex and cover up to $700m in losses. (Commerce eventually upheld Boeing’s complaint and levied a 292% tariff. But the required review by the Court of International Trade found Boeing suffered no harm in a deal with Delta Air Lines that triggered the complaint. The CIT’s finding killed the tariff.)
Bombardier was unable to fulfill its commitments to Airbus, which eventually bought out Bombardier’s remaining share of the program. (A Quebec, Canada, pension fund still retains about 25% ownership of the program.)
Boeing prepares to swap engines from MAX inventory to new production
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By Scott Hamilton
Aug. 15, 2022, © Leeham News: Boeing CEO David Calhoun says the company won’t build 737 gliders. That’s what airplanes are called as they exit final assembly without engines. The mitigation ironically comes from a circumstance that bedeviled Boeing since March 2019.
Planning is underway to take engines from the large inventory of stored 737 MAX aircraft to install on new production airplanes, LNA confirmed.
Engineless Boeing 737 MAXes in 2018. Boeing is making counterweights to hang on the new-production airplanes if CFM can’t deliver engines on time. Credit: Woody’s Images.
Boeing is producing 20-30 ship sets of counterweights, LNA is told. The counterweights are yellow blocks hung from the pylons to which engines are attached. The weights are needed to prevent the airplanes from sitting on their tails without the heavy engines installed. The counterweights will be installed on the stored airplanes when the CFM LEAP-1B engines are removed to install on new production aircraft as they roll off the final assembly line in Renton (WA).
In 2018, some MAXes rolled off the final assembly line without engines when CFM deliveries couldn’t match the production rate then.
Airbus has upward of 30 A320 gliders because CFM and Pratt & Whitney can’t deliver engines on time due to supply chain issues. Boeing, struggling to return to the 2019 737 production rate of 52/mo following the 21-month grounding of the MAX and a slow recovery from the COVID pandemic, hasn’t produced gliders yet. CFM is the exclusive engine supplier for the MAX.
Bjorn’s Corner: Sustainable Air Transport. Part 32. Mixed architectures, Part 2.
August 12, 2022, ©. Leeham News: Last week, we looked at two eVTOLs that don’t fit the terminology we use; Multicopters, Vectored thrust, or Lift and Cruise, the Vertical VX4, and the Archer Maker. We look at Airbus’ CityAirbus NG this week, a Lift and Cruise design like no other (Figure 1).
Figure 1. The Airbus CityAirbus NG. Source: Airbus.
The industries’ CASM trap
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By Bjorn Fehrm
Introduction
August 11, 2022, © Leeham News: The airliner world measures efficiency in CASM, Cost per Available Seat Mile, and RASM, Revenue per Available Seat Mile. An airliner with more seats then has lower CASM or RASM.
Looking at seat counts, we can see that the hottest selling single-aisle, the Airbus A321neo, is closing the gap to widebodies like Boeing’s 787-8 and Airbus’ A330-800.
So it’s CASM, and RASM should be phenomenal. Or is it? Are we comparing correctly, or are these Apples and Oranges comparisons? We use the cabin generator of our airliner performance model to understand it better.
Summary
- The measurement of economics per seat makes sense for internal airline work.
- When comparing different airliner types in the same size class or between types (single-aisle, widebody), it’s the wrong method.