Leeham News and Analysis
There's more to real news than a news release.
Leeham News and Analysis
- Bjorn’s Corner: New engine development. Part 4. Propulsive efficiency April 19, 2024
- Boeing unlikely to meet FAA’s 90-day deadline for new safety program April 18, 2024
- Focus on quality not slowing innovation, says GKN April 18, 2024
- Boeing defends 787, 777 against whistleblower charges April 17, 2024
- Dissecting Boeing CEO’s statement next new airplane will cost $50bn April 15, 2024
Bjorn’s Corner: Sustainable Air Transport. Part 37. VTOL Flight Control.
September 16, 2022, ©. Leeham News: We discussed one of the critical systems for an eVTOL over the last weeks, the battery system, its cells, and its management system. Another critical system for a VTOL is its Flight… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 35. Lilium battery cells.
September 2, 2022, ©. Leeham News: This is a summary of the article Part 35P, Lilium battery cells. It discusses the requirement the Lilium jet principle puts on its battery cells and how this is solved, both with… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 35P. Lilium battery cells. The deeper discussion.
Subscription required September 2, 2022, ©. Leeham News: This is a complementary article to Part 35, Lilium battery cells. It discusses the requirement the Lilium jet principle puts on its battery cells and how this is solved, both… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 34. eVTOL battery cells
August 26, 2022, ©. Leeham News: This is a summary of the article Part 34P, eVTOL battery cells. It discusses the main component of the battery system, the battery cell. The Lithium-Ion cells in an eVTOL battery system… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 30. Lilium Jet VTOL.
July 28, 2022, ©. Leeham News: This week, we analyze the Lilium Jet VTOL. It’s a vectored thrust design, but it’s different enough in its characteristics from the vectored thrust VTOLs we looked at in Part 28 (Joby… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 29. Lift + Cruise VTOLs.
July 22, 2022, ©. Leeham News: We analyzed vectored thrust VTOLs last week, like Joby Aviation’s Joby S4. Now we look at VTOLs that separate vertical and forward flight thrust generation into two different systems. Typical exponents are… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 27. Multicopters.
July 8, 2022, ©. Leeham News: We will start the analysis of the market’s most prominent VTOL variants by looking at the simplest version, multicopters. When we analyze the multicopters, we can go through some fundamentals of how… Read More
Boeing invests $450m in Wisk Aero air taxi venture
By Bjorn Fehrm January 25, 2022, ©. Leeham News: Boeing and Wisk Aero yesterday had a media briefing on why Boeing is extending its investment in Wisk Aero with a further $450m. The main technology is not the… Read More