Leeham News and Analysis
There's more to real news than a news release.
Leeham News and Analysis
- GE testing of giant GE9X engine aims for maturity at entry into service June 30, 2025
- Bjorn’s Corner: Air Transport’s route to 2050. Part 28. June 27, 2025
- Parent agency, FAA often at odds as politics outweighs safety June 26, 2025
- Electric Flight and the Ugly Duckling June 25, 2025
- Engine makers tout “Plan A” but have “Plan B” backups in R&D June 23, 2025
Bjorn’s Corner: Sustainable Air Transport. Part 7. Hybrids.
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
Hydrogen, electric and hybrid alternatives not here yet
By Scott Hamilton Sept. 25, 2020, © Leeham News: Commercial aviation has had 70 years to use jet fuel safely. It’s unclear how long it will take to reach the same level of safety with hydrogen, say Boeing…. Read More
Bjorn’s Corner: Why e in ePlane shall stand for environment, Part 14. Parallel Hybrid.
March 20, 2020, ©. Leeham News: In this week’s Corner, we continue our analysis of what it means for a regional airliner to go from Turbofan propulsion to Hybrid Electric propulsion. Last week, we looked at a Serial… Read More
Bjorn’s Corner: Why e in ePlane shall stand for environment, Part 13. Serial Hybrid.
March 13, 2020, ©. Leeham News: In this week’s Corner, we address an often forgotten aspect of Electric and Electric-Hybrid aircraft design. The battery as an energy source, as the only or assisting source, has the same weight… Read More
Bjorn’s Corner: Why hybrid cars work and hybrid airliners have challenges
June 14, 2019, ©. Leeham News: In last week’s Corner we discussed why aircraft with batteries as an energy source will be short ranged for decades to come. The battery energy density is too low and it won’t… Read More
Airbus, Rolls-Royce and Siemens develops Hybrid-Electric demonstrator
By Bjorn Fehrm November 29, 2017, © Leeham Co.: Airbus, Rolls-Royce and Siemens yesterday announced they will fly a hybrid-electric demonstrator by 2020, E-Fan X (Figure 1). The aircraft, a BAe 146 four engine regional jet, will have… Read More
Paris Air Show preview: Don’t look for big news
By Scott Hamilton June 11, 2025, © Leeham News: Don’t look for big news at the Paris Air Show, which begins on Monday and runs through Thursday. There won’t be any program launches. Orders from ATR, Airbus, Boeing… Read More
Bjorn’s Corner: Air Transport’s route to 2050. Part 23.
May 23, 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 22.
May 16, 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 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