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 25. June 6, 2025
- New RISE powerplant benefits from decades of GE research and development June 5, 2025
- Engine makers emphasizing durability, reliability June 4, 2025
- Boeing CEO: Lessons learned are key to certification of 737-7/10 and 777X June 2, 2025
- Digital twin is a key to JetZero’s hopes for Blended Wing Body entry June 2, 2025
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.
CSeries trans-Atlantic capability
By Bjorn Fehrm
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Introduction
February 23, 2017, © Leeham Co.: We previously described how new generation engines make the Boeing 737 MAX 8 a trans-Atlantic aircraft. The MAX 8 is smaller than the Airbus A321LR, but not the smallest single-aisle with trans-Atlantic capability. This distinction goes to the Bombardier CSeries.
We wrote about the CS100 capability to cross the Atlantic from London City Airport last year. After the article, we received new and improved data from Bombardier. The CS100 can now fly directly to US East Coast on the difficult westward leg with a business cabin of 42 seats. The updated article is here.
When we look at the improved capabilities of the CS300 (announced at Farnborough Air show last summer), this aircraft can also cross the Atlantic with a full cabin of 130 passengers.
Bombardier arranged so we could discuss this deeper with the VP CSeries program, Rob Dewar.
Summary:
- We use our aircraft performance model to compare the CS300’s suitability for long-haul to the Airbus and Boeing competition.
- The aircraft have similar range and seat mile costs. The smaller aircraft have lower trip costs.
- With Rob Dewar, we explored the potential for additional capability for the CS300.
Bombardier YE2016 results better than expected
Alain Bellemare, CEO of Bombardier.
Feb. 16, 2017: Bombardier today posted better than expected results (even on lower revenue) for the fourth quarter and full year.
Goldman Sachs was first out with reaction among the analyst reports LNC receives:
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BBD’s press release is here. The financial presentation from today’s earnings call is here.
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.
Bjorn’s Corner: Aircraft engines in operation, Part 3
By Bjorn Fehrm
February 3, 2017, ©. Leeham Co: In the last Corner, we went through how our airliner engine reacts to the different phases of flight, including what happens when we operate in a hot environment.
We also showed how engine manufacturers make a series of engines with different thrust ratings by de-rating the strongest version through the engine control computer.
Figure 1. Principal picture of a direct drive turbofan. Source: GasTurb.
We will now look deeper at how engines are controlled and why so-called flat-rating is important. Read more
MRJ regional jet delayed until mid-2020
By Bjorn Fehrm
January 23, 2017, ©. Leeham Co: Mitsubishi announced a further two years delay of the MRJ regional jet project in a press conference in Tokyo today.
The 90-seater variant of the aircraft will be delivered to the first customer, All Nippon Airways (ANA), mid-2020.
The previous scheduled Entry Into Service (EIS) of mid 2018, was announced December 2015. In total, the MRJ program has announced five delays, totaling seven years. Read more
The regional market and scope clauses
By Bjorn Fehrm
January 17, 2017, ©. Leeham Co: Union contract Scope Clauses–the provision limiting the weight, capacity or number of aircraft operated by airlines for major carriers–are unlikely to be modified any time soon, panelists at the Air Finance Journal conference in Dublin said.
The restrictive Scope Clauses are predominate in the US. These limit the ability of small airplane manufacturers to sell aircraft in the US. Most affected are Embraer, Bombardier and newcomer Mitsubishi.
Contract negotiations in December, concluded before Christmas, resulted in no changes, surprising some. This will impact planned purchases of aircraft.
We sat with Bombardier’s Ross Mitchell, vice president of commercial operations, to understand why the scope clauses are so important and why they did not change. Read more
Bjorn’s Corner: Geared turbofans
By Bjorn Fehrm
January 13, 2017, ©. Leeham Co: The time has come to go through the reasons why some turbofan engines are designed with a gearbox between the fan and the low pressure shaft.
The principle design is shown in Figure 1. It’s a graphical representation of a geared turbofan from the engine analysis software GasTurb.
Figure 1. GasTurb principal representation of a geared turbofan. Source: GasTurb.
The base idea is to have the low pressure spool of the engine to run at a considerably higher RPM than the fan. Read more
Assessing the MC-21 future
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Introduction
Feb. 9, 2017, © Leeham Co.: Russia’s Irkut designed a mainline jet to compete with the Airbus A320 and Boeing 737 families that, from a passenger experience
Irkut MC-21 at roll-out. Photo via Google images.
viewpoint, is the best in class.
The MC-21 has a wider fuselage than the A320 (which is wider than the 737). Seats and the aisle are the widest in the class. The overhead bin space is plentiful.
But the airplane is hampered by its environment: Russia itself.
Summary
Read more
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Posted on February 13, 2017 by Scott Hamilton
Airbus, Boeing, China, Comac, Irkut, Leeham News and Comment, Pratt & Whitney, Premium, United Aircraft
737, A320, Airbus, ARJ-21, Boeing, C919, C929, Irkut, MC-21