Leeham News and Analysis
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Leeham News and Analysis
- Bjorn’s Corner: New engine development. Part 4. Propulsive efficiency April 19, 2024
- Boeing unlikely to meet FAA’s 90-day deadline for new safety program April 18, 2024
- Focus on quality not slowing innovation, says GKN April 18, 2024
- Boeing defends 787, 777 against whistleblower charges April 17, 2024
- Dissecting Boeing CEO’s statement next new airplane will cost $50bn April 15, 2024
NMA focus needs to be on engines
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Introduction
March 19, 2018, © Leeham Co.: As the market awaits a decision by Boeing whether to launch the New Midrange Aircraft (NMA, or 797), focus has been on the aircraft’s definition and market demand.
It should be on the engines.
It doesn’t matter whether Boeing designs a fabulous airplane that’s the next best thing to sliced bread. What matters is whether the engines will be ready in time for Boeing’s suggested entry-into-service and if they are, whether they will be reliable out of the box.
The recent track record isn’t all that encouraging. Neither is Boeing’s preferred timing.
Summary
- CFM, GE, Pratt & Whitney and Rolls-Royce each had problems with their new engines. All continue.
- The Boeing NMA requires brand new engines, not derivatives.
- Engine development and certification within the Boeing preferred timeline is sporty at best.
Engine makers “inside the tent” on Boeing NMA, but airframer still ponders provider
March 5, 2018, © Leeham Co.: The three engine makers, CFM/GE, Pratt & Whitney and Rolls-Royce, are the only suppliers that have been brought “inside the tent” by Boeing for the New Midrange Aircraft, a company executive said today.
Launching the program is critical on the engine companies, says Randy Tinseth, VP marketing for Boeing. Boeing hasn’t decided—officially—whether it will have a
Randy Tinseth. Photo via Google images.
single-engine or dual-engine source for the aircraft because the program hasn’t been launched.
Market intelligence tells LNC that Boeing wants two engine choices. Intel also indicates all three engine OEMs view the market demand as sharply smaller than Boeing’s publicly-stated forecast of 4,000 Middle of the Market sector airplanes over the next 20 years.
Aerion’s supersonic engine presented
By Bjorn Fehrm
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Introduction
February 26, 2018, ©. Leeham Co: Aerion Supersonic’s CEO and Executive Chairman, Brian Barents, presented the first pictures of the Aerion AS2 biz jet’s engine at the recent PNAA conference in Seattle.
It’s the first engine adapted for supersonic passenger transport since the Concorde’s Olympus engine was developed in the 1960s.
Figure 1. Aerion’s supersonic AS2 business jet. Source: Aerion.
Based on the released configuration sketch, we put the engine through our GasTurb modelling software. Here’s what we found.
Summary:
- The Aerion AS2 engine combines the CFM56 core with a new high Specific Thrust low-pressure spool.
- Through the AS2’s M1.4 cruise speed limit, complex variable engine inlets and outlets can be avoided.
Pontifications: Transformation is key to increasing production rates
By Scott Hamilton
Feb. 19, 2018, © Leeham Co.: The likely prospect that Airbus and Boeing will increase single-aisle production rates next decade is outlined in our paywall article today.
The whys and capabilities to do so are outlined in the paywall post. The how is what I’ve been writing about since the first of the year, when LNC looked ahead to its 2018 forecast.
The “how” is the transformation in production that is underway in aerospace.
Leahy remains steadfast in A380 future
Feb. 16, 2018, © Leeham Co.: It’s been a long struggle and there isn’t a re-engining any time soon, but John Leahy still firmly believes in the market viability of the Airbus A380.
John Leahy stand behind the Airbus A380. Photo via Google images.
Leahy, who retired last month as COO-Customers, continues to support the transition to Eric Schulz, EVP, Chief of Sales, Marketing & Contracts. One of Leahy’s last deals was to firm up an A380 MOU for 20 orders and 16 options for Emirates Airline.
In his final retirement interview with LNC, Leahy didn’t waver from the messaging Airbus used since the launch of the A380 program in 2000: passenger traffic doubles every 15 years, no new airports and few new runways are being added in Europe, the US or Asia outside of China and the need for the A380 remains.
Chinese and Russian Widebody takes shape. Part 5.
By Bjorn Fehrm
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Introduction
February 12, 2018, © Leeham Co.: In the fourth article about the Chinese/Russian wide-body, CR929, we analyzed the engine selection for the aircraft. Now we continue with a first performance analysis of the CR929 against its main competitors, the Boeing 787-9 and Airbus A330-900.
We will use the preliminary data we have collected for the CR929 and compare this to the data for the 787-9 and A330-900. 
It’s the first analysis, on preliminary information. But there is enough knowledge of the key parameters to use our performance model to draw the first conclusions about the CR929’s positioning in the market.
Summary:
- The CR929-600 is modeled closely after the 787-9. The technology for structures, systems, engines and aerodynamics are similar.
- With a similar payload capacity, the fuel consumption should be better as the CR929 is defined with a lower maximum range.
- It’s wider cabin eats up the weight and drag advantage, however. There will be little difference between the efficiency of the 787-9 and the 15 years younger CR929.
Chinese and Russian Widebody takes shape. Part 4.
By Bjorn Fehrm
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Introduction
February 1, 2018, © Leeham Co.: In the third article about the Chinese/Russian widebody, CR929, we looked at the challenges the aircraft poses to the involved manufacturers. Now we continue with analyzing the project’s engine needs.
The CR929 is sized to use engines from the Boeing 787 project. Both GE Aviation and Rolls-Royce got Request for Proposals (RFPs) on 22 Dec. 2017. In addition, the Russian and Chinese engine industry wants to develop an engine for the project.
Summary:
- The Chinese and Russian widebody program needs engines in the 75,000lbf thrust class.
- The project’s engine specification is closely modeled after the engines available from the Boeing 787 project.
- In addition to the available 787 engines, the Chinese and Russian engine industry is trying to unite behind a joint engine proposal.
Chinese and Russian Widebody takes shape: Part 2.
By Bjorn Fehrm
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Introduction
January 18, 2018, © Leeham Co.: In the first article about the Chinese/Russian widebody, the CR929, we described the route to a joint program company and the launch of the project.
We now analyze the aircraft, based on available information. With the information, it’s possible to model the aircraft in our performance model and get the first understanding of performance and efficiency.
Summary:
- The CR929-600 is closely modelled after the Boeing 787-9. The overall design and dimensions are similar.
- The major difference to the 787-9 is in cabin width, allowing comfortable nine abreast seating, and the Maximum Take-Off Weight (MTOW).
- The decision to design CR929-600 for a lower MTOW has restricted range to 6,500nm with the nominal cabin capacity of 280 passengers.
Chinese and Russian Widebody Project takes shape
By Bjorn Fehrm
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Introduction
January 15, 2018, © Leeham Co.: The Chinese and Russian Widebody program started in earnest over the last year. After signing a joint venture agreement in 2016, the project now has a joint management company, CRAIC, formed 22nd of May 2017, and standing for China-Russia Commercial Aircraft International Corporation.
The company will have final assembly and management located in Shanghai. The aircraft has also got its final name, CR929-600. It will hold 280 passengers in a three-class cabin with a range of 6,500nm, Figure 1.
Figure 1. The CRAIC CR929-600, the main aircraft in the Chinese-Russian widebody program. Source: CRAIC.
Summary:
- The Chinese and Russian widebody program has taken off after the joint company was established spring 2017.
- The organization of the company is set, with the Chinese taking the rudder by the power of a five times larger market and economy and a 10 times larger population.
- The joint company, CRAIC, issued its first vendor RFP to GE and Rolls-Royce before Christmas for the aircraft’s propulsion system.
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Is the Airbus A321LR a better NMA stopgap than the 767-300?
By Bjorn Fehrm
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Introduction
January 04, 2016, © Leeham Co.: We have discussed if the Boeing 767-300ER could function as a stopgap until an NMA would be available. We then compared it with Boeing’s 787-8 and Airbus’ A330-800 as alternative stopgaps. We didn’t include any single-aisle alternatives at the time, like Airbus’ A321LR or Boeing’s 737 MAX 10.
These aircraft have limitations in passenger capacity and range compared with the 767. The least compromised aircraft in an NMA role is the A321LR, which comes within 1,500nm of the range of the 767-300ER. We, therefore, use it as our single-aisle alternative when we look at further stopgaps until an NMA arrives in 7-10 years.
Summary:
- The A321LR has 30% less passenger capacity than the 767-300ER when configured with comparable cabin standards.
- It also has 1,500nm less range than the 767-300ER.
- The operating costs on a trip and seat-mile basis are considerably lower, however.
- If the majority of planned routes are within the capability of the A321LR and other aircraft, with longer range, could complement it on the longest routes, it is a more economical alternative to a new 767, both on a Cash Operating Cost basis and when including capital costs.
- This assumes increased route frequency can compensate the higher capacity of the 767.