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
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
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
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
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
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
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
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
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
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