Bjorn’s Corner: The challenges of hydrogen. Part 26. Auxiliary power

February 26, 2021, ©. Leeham News: Last week we discussed auxiliary power generation for a hydrogen aircraft and found that a fuel cell system had many attractions. However, it’s more challenging to develop than a hydrogen-converted APU, and… Read More

Podcast: 10 Minutes About Sustainable Air Transport

Feb. 16, 2021, © Leeham News: Electrically powered aircraft. Or hybrids. Or bio-fuels. Or hydrogen. These are the alternative suggested by environmentalists and industry to reduce carbon emissions by the airlines. Which makes sense? Which is practical? Today’s… Read More

Bjorn’s Corner: The challenges of hydrogen. Part 24. Propulsion choice

February 12, 2021, ©. Leeham News: After covering the basics of fuel cells last week in our hydrogen airliner series, we now look at what type of system to choose for aircraft propulsion and onboard systems power. We… Read More

Bjorn’s Corner: The challenges of hydrogen. Part 23. Hydrogen fuel cells

February 5, 2021, ©. Leeham News: Last week, we started the discussion around fuel cells as a source of electric energy in airliners. We went through the principle and asked some vital questions. Now we look at different… Read More

Bjorn’s Corner: The challenges of hydrogen. Part 22. Hydrogen fuel cells

January 29, 2021, ©. Leeham News: Over the last weeks, we looked at Center of Gravity (CG) problems with rear fuselage liquid hydrogen tanks as used in Airbus’ ZEROe turbofan airliner concept. We can conclude that the CG… Read More

Bjorn’s Corner: The challenges of hydrogen. Part 21. Hydrogen airliner weight shift

January 22, 2021, ©. Leeham News: In last week’s Corner, we looked at how the hydrogen consumed in the rear fuselage tanks changes the airliner’s Center of Gravity (CG). Now we discuss how this change of Center of… Read More

Bjorn’s Corner: The challenges of hydrogen. Part 20. Hydrogen airliner weight shift

January 15, 2021, ©. Leeham News: In last week’s Corner, we looked at how hydrogen consumed in the rear fuselage tanks of Airbus’ ZEROe concept affect the airliner’s efficiency. Now we look at other aspects of the rear… Read More

Bjorn’s Corner: The challenges of hydrogen. Part 19. Hydrogen airliner weight shift

January 8, 2021, ©. Leeham News: In our Corner before Christmas we discussed the hydrogen tank placement at the rear of the aircraft for Airbus’ ZEROe concept turbofan aircraft. We now calculate how the weight transfer when emptying… Read More

Bjorn’s Corner: The challenges of hydrogen. Part 18. Airliner hydrogen tank

December 18, 2020, ©. Leeham News: After discussing the risk-reducing research programs we need to do before a program launch in 2027, we focus the next Corners on the hydrogen airliner’s biggest problem, the liquid hydrogen tank. In… Read More

Bjorn’s Corner: The challenges of hydrogen. Part 17. Hydrogen airliner program

December 11, 2020, ©. Leeham News: We use this Corner to define the time table for our hydrogen airliner program and for what areas we need to conduct risk-reducing research before we embark on an actual design. As… Read More