Leeham News and Analysis
There's more to real news than a news release.
Leeham News and Analysis
- China bans Boeing, US parts imports in tariff war April 15, 2025
- Boeing welcomes COMAC competition as Asia-Pacific demand soars April 15, 2025
- How good is the C929? April 14, 2025
- Bjorn’s Corner: Air Transport’s route to 2050. Part 17. April 11, 2025
- Uncertainty plagues airline, aerospace, lessor industries over tariffs April 10, 2025
Bjorn’s Corner: New engine development. Part 27. Long developments
October 4, 2024, ©. Leeham News: We do an article series about engine development and why it has longer timelines than airframe development. It also carries larger risks of product maturity problems when it enters service than the airframe of an airliner.
We looked at engine technologies and why several are challenging to bring to a mature technical state. Then, we compared previous engine developments with the present generation. Memory is short. What we could see is that previous generations of engines carried larger reliability and durability problems than the present generation engines.
Now, we discuss the development timelines for key engine versus airframe developments.
Figure 2. The GE-36 Open Fan of the first generation, from 1988. Source: Wikipedia.
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Bjorn’s Corner: New engine development. Part 26. New versus old, Trent 1000 vs. XWB
By Bjorn Fehrm
September 27, 2024, ©. Leeham News: We do an article series about engine development and why it has longer timelines than airframe development. It also carries larger risks of product maturity problems when it enters service than the airframe of an airliner.
In our look at examples of recent developments with problems and these put in a historical perspective, looking at the reliability and durability of its predecessor we compare the Rolls-Royce Trent 1000 for the Boeing 787 to the Trent XWB for the Airbus A350.
Figure 1. The Rolls-Royce Trent 1000 with its wide cord hollow titanium fan. Source: Rolls-Royce.
Embraer versus Boeing JV arbitration decision results in $150m cash payment
By the Leeham News team
September 16, 2024, © Leeham News: Embraer issued a short investor release today stating that the arbitration was concluded regarding Boeing’s unilateral termination of the agreement of a Commercial Aircraft Joint Venture and a partnership regarding the C-390 aircraft. Boeing did the M&A termination in April 2020.
The resu
lt is that Embraer will receive a $150 m cash payment from Boeing. The payment is below the market expectations, which were around $300m to cover the Embraer carve out and carve in costs. The issue of the Boeing merger and its effects on Embraer is now history, which is positive even though Boeing’s damages payment was lower than expected.
Embraer will most likely use the cash injection to lower its net debt, which is already at a low $1.3bn and has a leverage to EBITDA of 2.0.
It was in July 2018 that Embraer announced it would sell 80% of its Commercial Aviation business, then valued at a 100% value of $5.25bn to Boeing. The Master Transaction Agreement was signed in January 2019. It included a joint venture for marketing the C-390 Millenium multi-mission military cargo jet.
Bjorn’s Corner: New engine development. Part 24. New versus old, GTF versus V2500
By Bjorn Fehrm
September 13, 2024, ©. Leeham News: We do an article series about engine development and why it has longer timelines than airframe development. It also carries larger risks of product maturity problems when it enters service than the airframe of an airliner.
We have covered the engine’s different parts and their technology challenges. We now look at some examples of recent developments with problems and put them in a historical perspective.
The A330neo for medium haul or twice the frequency with A321XLR? Part 2
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By Bjorn Fehrm
September 12, 2024, © Leeham News: We examine the high-volume short-to-medium-range market and check whether a route previously reserved for the Airbus A330neo can be flown with a fleet of A321XLRs. At equal per-passenger operational costs, doubling the frequency is advantageous and can drive market growth, revenue, and margin.
After comparing the aircraft and their seating, we now use our Airliner Performance and Cost Model (APCM) to fly them on a Southeast Asia route and compare the operating costs.
Summary:
- The A321XLR is competitive on fuel costs but loses out on Cash costs as several cost factors don’t scale linearly with passenger capacity.
- The cost disadvantage doesn’t render the A321XLR a non-replacement for an A330-900; it just needs a positive revenue uptick from the frequency increase to be an interesting alternative.
Bjorn’s Corner: New engine development. Part 20. Temperatures.
By Bjorn Fehrm
August 16, 2024, ©. Leeham News: We do an article series about engine development. The aim is to understand why engine development now has longer timelines than airframe development and carries larger risks of product maturity problems.
To understand why engine development has become a challenging task, we need to understand engine fundamentals and the technologies used for these fundamentals.
We have covered the different areas of a gas turbine except the exhaust (Figure 1). Before we go to the exhaust and the different outputs from a gas turbine Core, we look at the temperatures and how to cope with them in the different sections of a gas turbine.
Figure 1. The gas turbine cycle and its parts. Source: Rolls-Royce: The Jet Engine.
Airbus 1H2024 results: Space business problems lower results
July 30, 2024, © Leeham News: Airbus has presented its results for the second quarter of 2024. The results were impacted by a thorough review of its Space business, which resulted in a quarterly write-off of almost €1bn.
The rest of the group is performing as expected after adjusting for Airbus’ announcement in June that the year’s deliveries of A320/A321 aircraft fell short by 30 units to 770 total, as the supply chain can’t ramp from last year’s 730 to the anticipated 800.
The company announced a 1H2024 profit of 733m€ (1,452m€ 1H2023), on revenue of 28.8bn€ (27.7bn€).
Maeve, P&W Canada team for new hybrid propulsion system airplane
By Bjorn Fehrm and Scott Hamilton
July 24, 2024, © Leeham News at Farnborough International Airshow: Start-up airplane company Maeve and Pratt & Whitney Canada (PWC) have teamed for the design of a new eco-airplane driven by a new type of hybrid electric propulsion system with a target service entry date of 2032.
The M80 aircraft is the latest iteration of a design conceived by Maeve of the Netherlands. It is a 76 to 96-seat twin-engine aircraft that is compliant with the restrictive US pilot Scope Clauses, which limit the size, number, and weight of airplanes operated on behalf of US major airlines. Maeve originally designed a four-engine, 44-passenger electric aircraft called the M01.
Figure 1. The Maeve M80 combines an all-new powerplant from Pratt & Whitney Canada and downward wing droops instead of upward winglets. Source: Maeve.
Bjorn’s Corner: New engine development. Part 16. Compressor air use.
By Bjorn Fehrm
July 19, 2024, ©. Leeham News: We do an article series about engine development. The aim is to understand why engine development now has longer timelines than airframe development and carries larger risks of product maturity problems.
To understand why engine development has become a challenging task, we need to understand engine fundamentals and the technologies used for these fundamentals.
We have covered the problem areas of a compressor and how these achieve power-to-air-pressure conversion efficiencies of over 90% by using advanced 3D airflow modeling. Now, we look at the users of the air from the engin’s compressor.
Figure 1. The gas turbine cycle and its parts. Source: Rolls-Royce: The Jet Engine.
Bjorn’s Corner: New engine development. Part 15. Compressor efficiency.
By Bjorn Fehrm
July 12, 2024, ©. Leeham News: We do an article series about engine development. The aim is to understand why engine development now has longer timelines than airframe development and carries larger risks of product maturity problems.
To understand why engine development has become a challenging task, we need to understand engine fundamentals and the technologies used for these fundamentals.
We covered the problem areas of a compressor last week. Now, we will discuss how modern compressors can have over 90% conversion efficiency from turbine power to air compression.
Figure 1. The gas turbine cycle and its parts. Source: Rolls-Royce: The Jet Engine.