Leeham News and Analysis
There's more to real news than a news release.
Leeham News and Analysis
- Bjorn’s Corner: Air Transport’s route to 2050. Part 19. April 25, 2025
- How good is the C929? Part 2. April 24, 2025
- Boeing First Quarter Results Update: China is 10% of the backlog, with 500 in “Unidentified” April 24, 2025
- Boeing First Quarter Results: Tariffs, Return flights, $10.55bn asset sale April 23, 2025
- RTX Q1 2025 Earnings: GTF Talk Takes A Back Seat To Tariffs April 22, 2025
Could an NMA be made good enough? Part 5
By Bjorn Fehrm
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Introduction
April 20, 2017, © Leeham Co.: After defining the fuselage and wings, it’s now time for the engines. We go through the sizing criteria for engines for airliners and find the size of engine that is needed for the NMA.
The NMA will need engines which are larger than the single aisle engines for Airbus’ A320neo and Boeing’s 737 MAX. But they will be smaller than the next size up for modern engines, the GEnx-2B for Boeing’s 747-8.
Figure 1. The NMA takes more and more the shape of a 767 replacement (A United 767-200). Source: United
This means the NMA will need new engines, at least 50% larger than the present engines designed for A320neo and 737 MAX.
Summary:
- An NMA engine will be sized by V2 safety speed or Maximum Continuous Thrust (MCT) criteria.
- The normal Top of Climb (ToC) sizing point will be less stressing for a twin engine airliner like NMA.
Asian airline shift portends big ramifications
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Introduction
April 17, 2017, © Leeham Co.: A shift is underway among Asian airlines that could have ramifications for the airframe and engine manufacturers and, by extension, their suppliers.
It doesn’t appear, however, that aerospace analysts in the US and Europe realize this shift. At least none has written about it that we’ve seen among the research notes we receive.
Summary
- The creation of the Value Alliance of Low Cost Carriers brings together eight LCCs under one alliance.
- AirAsia faces a competitive threat.
- Full service carriers also face a threat, particularly those in Japan, concludes one aerospace analyst team in the region.
- Airbus, Boeing have a backlog of more than 1,000 airplanes with the VALCC group and hundreds more with other airlines.
Read more
Bjorn’s Corner: Aircraft engines, sum up
By Bjorn Fehrm
April 14, 2017, ©. Leeham Co: We’ve been talking engines on Fridays since October 2016. The Corners covered several areas, from technologies to operations.
And we could go on and dig deeper. But we will move on.
Before we go, we sum up what we have learned in the 24 Corners around airliner Turbofans.
Figure 1. Principal picture of a three-shaft wide-body turbofan. Source: GasTurb.
Bjorn’s Corner: Aircraft engine maintenance, Part 6
By Bjorn Fehrm
April 7, 2017, ©. Leeham Co: Last week’s Corner developed the overhaul shop visits per year for wide-body engines. We will now look at how the market develops around these overhaul opportunities.
How does the shop structure develop over a popular engine’s life-cycle? How much choice has an operator and when?
Figure 1. Principal picture of a three-shaft wide-body turbofan with station numbers. Source: GasTurb.
Bjorn’s Corner: Aircraft engine maintenance, Part 5
By Bjorn Fehrm
March 31, 2017, ©. Leeham Co: In the last Corner, we showed flight hour graphs for wide-body engines. Now we will deduce the market for engine overhauls from these graphs.
It will show which engines are still in engine manufacturer care, in their main maintenance cycle and in the sun-set phase.
Figure 1. Principal picture of a three shaft turbofan. Source: GasTurb.
The phase the engine is in and its future flight hour development will decide the attractiveness of the engine for overhaul organizations. Read more
Bjorn’s Corner: Aircraft engine maintenance, Part 4
By Bjorn Fehrm
March 24, 2017, ©. Leeham Co: After covering the maintenance market for single-aisle engines, time has come for the engines used on wide-body aircraft. The engine maintenance for a wide-body engine is a bit different to the single-aisle engine. The difference is caused by the longer flight times for the wide-bodies. This makes the flight time wear a more dominant maintenance driver than it is for the single-aisle engines.
The changes in overhaul work caused by the difference in flight profiles and the lower number of engines in the market (compared to the single aisles) will affect how the overhaul market is structured and who are the dominant players.
Figure 1. Principal picture of a tri-shaft turbofan for the wide-body market. Source: GasTurb.
Bjorn’s Corner: Aircraft engine maintenance, Part 3
By Bjorn Fehrm
March 17, 2017, ©. Leeham Co: In the last Corner, we showed graphs of the yearly flight hours for engines on single-aisle aircraft. Now we will deduce the market for engine overhauls from these graphs.
These will show which engines generate a maintenance volume that is interesting for engine overhaul companies and which engines are niche.
Figure 1. Principal picture of a direct drive turbofan. Source: GasTurb.
Based on the market size, we will then go through how an engine is maintained when new, mature and at end-of-life.
Bjorn’s Corner: Aircraft engines maintenance, Part 2
By Bjorn Fehrm
March 10, 2017, ©. Leeham Co: Last week we started the series how airline turbofans are maintained. We described the typical work scopes and what the intervals were for different single-aisle engines.
Before we can describe the engine maintenance market we must get a feel for the market size for different engine types.
Figure 1. Principal picture of a direct drive turbofan. Source: GasTurb.
We will start with understanding the single-aisle engine maintenance market. Read more
Engine OEMs diverge on technology for next generation
March 7, 2017, © Leeham Co.: Representatives of the four major commercial engine
GE9X, the final engine in a decade-long engine renewal program for GE Aviation and CFM International
manufacturers have divergent views of the next round of engine development, either for the Middle of the Market/New Mid-range Airplane (NMA) or New Small Airplanes (NSA) coming in the next decade.
Officials of CFM, GE, Pratt & Whitney and Rolls-Royce appeared at the annual ISTAT conference in San Diego yesterday.
PW’s Rick Deurloo, SVP of Sales, Marketing Commercial Engines, had the added task of dealing with the highly-publicized teething issues surrounding its new Geared Turbo Fan engine on the Airbus A320neo.
Singapore 777-9 order pressures, but does not kill A380
Feb. 16, 2017, © Leeham Co.: Last week’s order by Singapore Airlines for 20 Boeing 777-9s and 19 Boeing 787-10s immediately was viewed by some as the death
Boeing 777-9.
knell for the Airbus A380.
The 777-9 order would start the final spiral down for the A380, some contend.
This overstates the case and misunderstands the nature of the order.
The A380 is in trouble, there no doubt about that. The 777-9 is putting pressure on the A380. There’s no doubt about this, either. But the contention the Singapore 777-9 order sends the A380 on a death spiral is wild fantasy.
An Airbus official appears today at the annual conference of the Pacific Northwest Aerospace Alliance (PNAA) in Lynnwood (WA). Undoubtedly, he will maintain the party line that the future of the A380 is solid. This, too, overstates the case. There can be a future for the airplane, but some major decisions must be made.