Leeham News and Analysis
There's more to real news than a news release.
Leeham News and Analysis
- Boeing First Quarter Results Update: China is 10% of the backlog, with 500 in “Unidentified” April 24, 2025
- Boeing First Quarter Results: Tariffs, Return flights, $10.55bn asset sale April 23, 2025
- RTX Q1 2025 Earnings: GTF Talk Takes A Back Seat To Tariffs April 22, 2025
- Tariffs Tumult Takes Over GE Aerospace Q1 2025 Earnings Call April 22, 2025
- Boeing reports mixed results of latest employee survey, but middle management and officers remain key obstacles April 22, 2025
Bjorn’s Corner: Electric aircraft, Part 11
September 8, 2017, ©. Leeham Co: After our definition of an-all electric 10-seater for Ultra short-haul flying in last Corner, we now compare its economics to a gas turbine propelled design. Our designs have the Zunum Aero 10-seater commuter… Read More
Bjorn’s Corner: Electric aircraft, Part 10
September 1, 2017, ©. Leeham Co: in the nine previous Corners, we looked at 50-seat regional jets and turboprops with hybrid electric propulsion systems. We have seen that at the state of technology until the mid-next decade, such aircraft… Read More
Bjorn’s Corner: Electric aircraft, Part 9
August 25, 2017, ©. Leeham Co: We finished the weight sizing of the hybrid propulsion system for our 50-seat regional turboprop in the last Corner. Now we go a bit more into detail. There are additional parts needed in… Read More
Bjorn’s Corner: Electric aircraft, Part 7
August 11, 2017, ©. Leeham Co: In this Corner, we will design the hybrid propulsion system for our 50-seat regional turboprop. We could see in previous Corners that we can’t use batteries as a backup for our gas turbine… Read More
Bjorn’s Corner: Electric aircraft, Part 6
August 03, 2017, ©. Leeham Co: In our search for an electric regional aircraft configuration, we found that a jet aircraft requires too high power levels. The higher speeds of a jet aircraft take the power levels beyond what… Read More
Bjorn’s Corner: Electric aircraft, Part 5
July 28, 2017, ©. Leeham Co: In the last Corner, we looked at the mass of the propulsion components for a regional airliner. Now we complete the mass estimations for the complete hybrid electric system. We do that for… Read More
Bjorn’s Corner: Electric aircraft, Part 1
June 30, 2017, ©. Leeham Co: One of the areas I explored while at Paris Air Show last week was electric aircraft technology. With electric aircraft, we mean an aircraft where the propeller/fan is driven my an electrical motor…. Read More