Leeham News and Analysis
There's more to real news than a news release.
The state of alternative propulsion aircraft? Part 4.
Subscription required By Bjorn Fehrm December 4, 2025, © Leeham News: In our series about alternative propulsion aircraft, last week we looked at the aircraft batteries. These are heavy components with very low energy capacity per unit weight…. Read More
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
Bjorn’s Corner: Air Transport’s route to 2050. Part 21.
May 9, 2025, ©. Leeham News: We do a Corner series about the state of developments to improve the emission situation for Air Transport. We try to understand why development has been slow. Since we started in October… Read More
Bjorn’s Corner: Air Transport’s route to 2050. Part 20.
May 2, 2025, ©. Leeham News: We do a Corner series about the state of developments to improve the emission situation for Air Transport. We try to understand why development has been slow. We have since we started… Read More
Bjorn’s Corner: Air Transport’s route to 2050. Part 9.
February 14, 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 8
February 7, 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 4.
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
Heart Aerospace’s revised ES-30
Subscription required By Bjorn Fehrm September 26, 2024, © Leeham News: Heart Aerospace has revised its environmentally friendly aircraft for the third time. The variants started in September 2020, when Heart presented an all-electric, battery-based 19-seat airliner that… Read More
The reality behind the eVTOL industry’s hyperbole, Part 7.
Subscription required By Bjorn Fehrm August 24, 2023, © Leeham News: We have looked at the promises the VTOL industry made in their Investor prospects and what the reality is as the VTOLs come closer to Certification and… Read More
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