Leeham News and Analysis
There's more to real news than a news release.
The reality behind the eVTOL industry’s hyperbole, Part 3.
Subscription required By Bjorn Fehrm July 27, 2023, © Leeham News: We look at the promises that the VTOL industry has made in their Investor prospects and what the reality is as they come closer to Certification and… Read More
Bjorn’s Corner: New aircraft technologies. Part 21. Changed flight profiles
July 14, 2023, ©. Leeham News: Developments in engines and airframe technologies require that the aircraft are flown differently to maximize the benefits. We start by locking what changes in parasitic and induced drag mean for how airliners… Read More
Bjorn’s Corner: New aircraft technologies. Part 20. Efficient flying
July 7, 2023, ©. Leeham News: We explore different technologies in the series that can make our next-generation airliners more efficient and, thus, less polluting. We have discussed developments of engine and airframe technologies, such as Turbofans versus… Read More
Bjorn’s Corner: New aircraft technologies. Part 18. Minor drags
June 23, 2023, ©. Leeham News: In our series about technologies that influence the efficiency of a new generation of airliners, we have covered the dominant drag of an airliner, air friction drag, and the second largest drag,… Read More
Bjorn’s Corner: New aircraft technologies. Part 17. Airframe with lower induced drag
June 16, 2023, ©. Leeham News: This is a summary of the article Part 17P. Airframe with lower induced drag. The article analyzes Boeing 737 MAX 8-sized airliners with Truss Braced Wings versus wings with folding wingtips and… Read More
Bjorn’s Corner: New aircraft technologies. Part 17P. Airframe with lower induced drag
Subscription required June 16, 2023, ©. Leeham News: This is a complementary article to Part 17. Airframe with lower induced drag. It discusses in detail the simulations we have done on a Truss Braced Wing, using our Aircraft… Read More
The Small Airliner Problem, Part 8. A battery-based airliner
Subscription required By Bjorn Fehrm June 15, 2023, © Leeham News: In our series on fundamental costs factors that make up Cash Operating Cost, COC (Fuel, Maintenance, Airway/Airport fees, Crew costs), we have started analyzing if the size… Read More
Bjorn’s Corner: New aircraft technologies. Part 16. Airframe with lower induced drag
June 9, 2023, ©. Leeham News: This is a summary of article Part 16P. Airframe with lower induced drag. It discusses the Truss Braced Wing type of airframe that increases the practical wing span of an aircraft and… 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