Leeham News and Analysis
There's more to real news than a news release.
Leeham News and Analysis
- Boeing reports mixed results of latest employee survey, but middle management and officers remain key obstacles April 22, 2025
- Hopes for 1Q financial progress turns into bumpy ride for Boeing April 21, 2025
- Bjorn’s Corner: Air Transport’s route to 2050. Part 18. April 18, 2025
- Natilus: Composite BWB, entry-into-service by 2029, 570 on order April 17, 2025
- China bans Boeing, US parts imports in tariff war April 15, 2025
Bjorn’s Corner: The challenges of hydrogen. Part 21. Hydrogen airliner weight shift
By Bjorn Fehrm
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 Gravity, limiting the aircraft’s load flexibility, can be mitigated with different concepts.
Figure 1. Airbus ZEROe turbofan airliner. Source: Airbus.
Bjorn’s Corner: The challenges of hydrogen. Part 20. Hydrogen airliner weight shift
By Bjorn Fehrm
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 placement of the tanks.
Figure 1. Airbus ZEROe turbofan airliner. Source: Airbus.
Bjorn’s Corner: The challenges of hydrogen. Part 19. Hydrogen airliner weight shift
By Bjorn Fehrm
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 the tanks in the rear affects the ZEROe’s efficiency.
Figure 1. Airbus ZEROe hydrogen turbofan airliner. Source: Airbus.
Bjorn’s Corner: The challenges of hydrogen. Part 17. Hydrogen airliner program
By Bjorn Fehrm
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 we said in last week’s Corner, we aim to develop a hydrogen airliner for the heart of the domestic market after the COVID-19 Pandemic. It’s a 160 to 180 seat single-aisle turbofan driven airliner, using liquid hydrogen as the fuel.
Figure 1. Airbus ZEROe hydrogen-fueled airliner concepts. Source: Airbus.
Bjorn’s Corner: The challenges of Hydrogen. Part 16. A Hydrogen airliner
December 4, 2020, ©. Leeham News: To dig a level deeper into the challenges of hydrogen airliners, as a next step we design such a plane (on a high level), now that we have covered the basics.
It will make us traverse the fundamental design tradeoffs of such a design. Reflecting on what we discussed in Part 3, “The Application Space for a Hydrogen Airliner,” we focus on the single-aisle short-haul domestic market, Figure 1.
Figure 1. CO2 emissions per aircraft type and range flown. Source: EU Hydrogen Powered Aviation report.
Bjorn’s Corner: The challenges of Hydrogen. Part 15. Hydrogen cost
By Bjorn Fehrm
November 13, 2020, ©. Leeham News: In our series on hydrogen as an energy store for airliners, we now look at the cost of hydrogen.
The current cost-efficient production is predominantly by reforming natural gas, meaning it’s a process that involves carbons. Hydrogen as an energy transporter then makes no sense as the point is to de-carbonize our energy supply.
Figure 1. Cost of Hydrogen by 2040 as projected by the EU study. Source: EU.
Bjorn’s Corner: The challenges of Hydrogen. Part 14. Supply of Hydrogen
By Bjorn Fehrm
November 6, 2020, ©. Leeham News: In our series on Hydrogen as an energy store for airliners we now look at how to create a supply industry for hydrogen.
The problem of a sizable and competitive hydrogen supply industry is a chicken or egg problem. To achieve a competitive and functioning hydrogen transport system we need an adequate hydrogen infrastructure and to get an adequate hydrogen industry we need large-scale consumers.
Figure 1. The CO2 problem and the main contributors. Source: Wikipedia.
Bjorn’s Corner: The challenges of Hydrogen. Part 13. The supply of Hydrogen
October 30, 2020, ©. Leeham News: In our series on Hydrogen as an energy store for airliners we now address the problem of liquid hydrogen supply for air transport.
Before we go into the ecosystem and its costs, let’s start with a more principle discussion. Is continuing today’s consumption pattern a valid alternative?
Figure 1. World energy consumption by type and development. Source: Wikipedia.
Bjorn’s Corner: The challenges of Hydrogen. Part 12. Safety
By Bjorn Fehrm
October 23, 2020, ©. Leeham News: In our series on Hydrogen as an energy store for airliners we look deeper at the safety of a hydrogen airliner.
Do the safety rules for the aircraft or the airport need to be written new or can the existing ones be used with changes?
Bjorn’s Corner: The challenges of Hydrogen. Part 11. Emissions
October 2, 2020, ©. Leeham News: In our series on Hydrogen as an energy store for airliners we look deeper at the emissions from a hydrogen airliner and compare it to the emissions from today’s carbon fueled aircraft.
Figure 1. The three Hydrogen concepts from Airbus. Source: Airbus.