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
Bjorn’ s Corner: New aircraft technologies. Part 44. Operation and Continued Airworthiness
January 5, 2024, ©. Leeham News: We are discussing the different phases of a new airliner program. After covering the Design and Production, we now look at the Operational phase of a new airliner family. For the customer,… Read More
Bjorn’ s Corner: New aircraft technologies. Part 43. Delivery
December 22, 2023, ©. Leeham News: We are discussing the different phases of a new airliner program. After covering the Design, Prototype phase, and Production, we now look at the first deliveries. After about seven to nine years… Read More
Bjorn’s Corner: New aircraft technologies. Part 41. Production learning curve
December 08, 2023, ©. Leeham News: We are discussing the different phases of an airliner development program. After covering Conceptual, Preliminary, and Detailed design, the manufacturing of prototypes, and their roles in Flight Tests, we now look at… Read More
Bjorn’s Corner: New aircraft technologies. Part 35. Prototype manufacturing and Testing
October 20, 2023, ©. Leeham News: We are discussing the different design phases of an airliner development program. The typical phases and their time use and manning are described in the Gant chart in Figure 1. After covering… Read More
Bjorn’s Corner: New aircraft technologies. Part 26. Preliminary design
August 25, 2023, ©. Leeham News: We described the different phases of an airliner development program last week. We will look at the Preliminary design phase this week, what work is done, the tools used, and how it… Read More
Bjorn’s Corner: New aircraft technologies. Part 15. Airframe for lower Induced drag
June 1, 2023, ©. Leeham News: Last week, we examined ways to lower the dominant drag of an airliner, the air friction drag (Figure 1). Now we look at the second largest drag component, the Induced drag, and… Read More
Bjorn’s Corner: New aircraft technologies. Part 14. Airframe for lower friction drag
May 26, 2023, ©. Leeham News: This is a summary of the article Part 14P. Airframe for lower friction drag. The article discusses in detail a Blended Wing Body (BWB) type airframe and how it reduces the wetted… Read More
The Small Airliner Problem, Part 6
Subscription required By Bjorn Fehrm May 25, 2023, © Leeham News: In our series about the viability of the business plans for small airliners (nine to 50 seats), we have covered the cost factors that make up the… Read More
Bjorn’s Corner: New aircraft technologies. Part 13. Friction drag
May 19, 2023, ©. Leeham News: Last week, we looked at the different drag types (Figure 1) that reduce an airframe’s efficiency. We now look at the major drag types in more detail and what can be done… Read More
Bjorn’s Corner: New aircraft technologies. Part 12P. Airframe efficiency improvement
Subscription required By Bjorn Fehrm May 12, 2023, ©. Leeham News: This is a complementary article to Part 12. Airframe efficiency improvement. It discusses in detail the next-generation airframe improvements we can expect. We start with detailing the… Read More