Leeham News and Analysis
There's more to real news than a news release.
Leeham News and Analysis
- Pontifications: Airbus ponders A330neo MRTT, Boeing ponders KC-46A re-engine November 28, 2023
- Preview of Rolls-Royce Capital Markets Day November 27, 2023
- Bjorn’s Corner: New aircraft technologies. Part 39. Production November 24, 2023
- Further developments of the A321, Part 6 November 23, 2023
- Risk-Adjusted Business November 21, 2023
Bjorn’s Corner: Sustainable Air Transport. Part 19. Fuel Cell propulsion systems
May 13, 2022, ©. Leeham News: Last week, we looked at advanced developments for hydrogen-burning gas turbines. Now we look at the alternative hydrogen-based propulsion system, which uses a Fuel Cell to convert the energy in hydrogen to… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 18. Advanced Hydrogen Gas Turbines
May 6, 2022, ©. Leeham News: Last week, we looked at how we create the shaft power for the thrust device we discussed before. We described the basics of a hydrogen-burning gas turbine alternative. When we have liquid… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 17. Gas Turbine Propulsion
April 29, 2022, ©. Leeham News: Last week, we looked at the thrust generating device that aircraft propulsion systems use. We could conclude that independent of how we create the shaft power, we can choose different thrust technologies… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 16. Thrust generation
April 22, 2022, ©. Leeham News: Last week, we examined propulsion system alternatives and their principal advantages and disadvantages. Now we go deeper into these alternatives. All propulsion systems for aircraft use a propulsion device like a propeller… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 14. Propulsion system requirements.
April 8, 2022, ©. Leeham News: Last week, we discussed the architecture of a liquid hydrogen fuel system. We now start looking at the propulsion system of a hydrogen aircraft. Before discussing how a propulsion system is done,… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 13. Hydrogen fuel system and APU.
April 1, 2022, ©. Leeham News: Last week, we looked at how to store hydrogen in an aircraft. We could see the gaseous storage of hydrogen is too heavy other than for demo systems and extreme short-haul. For… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 10. Where Hybrids work.
March 11, 2022, ©. Leeham News: After our articles about Serial Hybrids and Parallel Hybrids showed they were unsuitable for airliners, where do these make sense? The obvious answer is for our stop-and-go cars (as we then can… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 9P. Parallel Hybrid. The deeper discussion.
Subscription required By Bjorn Fehrm March 4, 2022, ©. Leeham News: This is a complementary article to Part 9. Parallel Hybrid. It uses Leeham Company’s Aircraft Performance Model from our consultancy practice to analyze the design of a… Read More
Bjorn’s Corner: Sustainable Air Transport. Part 1. A deeper look.
January 7, 2022, ©. Leeham News: We finished a 34 article series before Christmas about the enormous work involved to get a new aircraft certified for passenger transport. It was a background article series to the one we… Read More
Sustainable Aero Lab disqualifies “Greenwash” investments
By Bjorn Fehrm August 25, 2021, ©. Leeham News: Times change and the use of words with it. Today, the hundreds of UAM Air Taxi projects talk about how “environmentally friendly” this mode of transportation is, and Boom’s… Read More