Leeham News and Analysis
There's more to real news than a news release.
The state of alternative propulsion aircraft? Part 2.
Subscription required By Bjorn Fehrm November 20, 2025, © Leeham News: In our series about alternative propulsion aircraft, we started last week by discussing what happened after the trigger by the Airbus E-fan flight in 2014 and the… Read More
What’s the status of the alternative propulsion projects for air transport?
Subscription required By Bjorn Fehrm November 13, 2025, © Leeham News: The interest for new and more environmentally friendly aircraft got underway in 2014, when Airbus flew the battery-electric E-fan demonstrator at the Farnborough Air Show in July,… Read More
Bjorn’s Corner: Air Transport’s route to 2050. Part 7.
January 31, 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 have… Read More
Bjorn’s Corner: Air Transport’s route to 2050. Part 6.
January 24, 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 have… Read More
Bjorn’s Corner: Air Transport’s route to 2050. Part 5.
January 17, 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 have… Read More
Bjorn’s Corner: Air Transport’s route to 2050. Part 3
November 1, 2024, ©. Leeham News: We do a Corner series about the state of developments to replace or improve hydrocarbon propulsion concepts for Air Transport. We will find that development has been very slow. Last week, we… Read More
Heart Aerospace’s revised ES-30, Part 3. UPDATED
Subscription required By Bjorn Fehrm October 24, 2024, © Leeham News: We analyze Heart Aerospace’s latest evolution of the hybrid ES-30. The latest version, presented in spring 2024, is a parallel hybrid, putting gas turbine turboprop engines outside… Read More
Heart Aerospace’s revised ES-30, Part 2
Subscription required By Bjorn Fehrm October 17, 2024, © Leeham News: We analyze Heart Aerospace’s latest evolution of the hybrid ES-30 (bottom aircraft in the picture), which replaces the original battery-based 19-seater (top aircraft) and the original ES-30… Read More