January 10, 2025, ©. Leeham News: We do a Corner series about the state of developments to replace or improve hydrocarbon propulsion concepts for Air Transport. We try to understand why the development has been slow. We listed… Read More
Subscription required By Bjorn Fehrm April 27, 2023, © Leeham News: We started a series about the viability of the business plans for small airliners (nine to 50 seats) last week in the light of a continuing decline… Read More
Subscription Required Now open to all readers. By Scott Hamilton Dec. 5, 2022, © Leeham News: Battery power. Hybrid-battery. Hydrogen. Hydrogen-hybrid. Sustainable Aviation Fuel. Whatever the path chosen by the hundreds of companies seeking greener commercial aviation, government… Read More
July 1, 2022, ©. Leeham News: Last week, we finished our discussions around Fuel Cell-based airliners using hydrogen as fuel. We could see the technology has true zero emissions, but the maturity of the many parts needed (hydrogen… Read More
June 24, 2022, ©. Leeham News: Last week, we discussed how a High Temperature Fuel Cell (HTFC) could improve the installation of a propulsion system in our 70-seat airliner. We now add this variant to the systems we… Read More
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
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
February 25, 2022, ©. Leeham News: This is a summary of the article Part 8P. Serial Hybrid, the deeper discussion. We take an ES-19 type of battery aircraft and add a range extender to avoid the inadequate range… Read More
February 18, 2022, ©. Leeham News: Having covered batterie-based electric aircraft in the last three articles, we now move to the next ideas to improve our aircraft’s efficiency and burn less carbon-based fuels, hybrids. A word of caution… Read More
February 4, 2021, ©. Leeham News: We did a simple reality check on two high-profile ideas for Sustainable Air Transport last week, the Eviation Alice project and Heart Aerospace’s ES-19. We now look at energy usage when performing… Read More