Bjorn’s Corner: Sustainable Air Transport. Part 24. High Temperature Fuel Cells

June 17, 2022, ©. Leeham News: Last week, we looked at the installation effects and efficiencies of the fuel cell systems we discussed in earlier parts of the series. We could see the variants were significantly heavier than… Read More

Bjorn’s Corner: Sustainable Air Transport. Part 22P. Fuel Cell system efficiency and mass. The deeper discussion.

Subscription required June 3, 2022, ©. Leeham News: This is a complementary article to Part 22, Fuel Cell system efficiency and mass. It analyses the power, loss, mass, and efficiency consequences of the different fuel cell architectures described… Read More

Bjorn’s Corner: Sustainable Air Transport. Part 17. Gas Turbine Propulsion

April 29, 2022, ©. Leeham News: Last week, we looked at the thrust generating device that aircraft propulsion systems use. We could conclude that independent of how we create the shaft power, we can choose different thrust technologies… Read More

Bjorn’s Corner: Sustainable Air Transport. Part 16. Thrust generation

April 22, 2022, ©. Leeham News: Last week, we examined propulsion system alternatives and their principal advantages and disadvantages. Now we go deeper into these alternatives. All propulsion systems for aircraft use a propulsion device like a propeller… Read More

Bjorn’s Corner: Sustainable Air Transport. Part 15. Hydrogen propulsion system choices.

April 15, 2022, ©. Leeham News: Last week, we examined different airliner types’ power requirements and the importance of their size classes in the market. Now we look at what propulsion system alternatives are available when using hydrogen… Read More

Bjorn’s Corner: Sustainable Air Transport. Part 13. Hydrogen fuel system and APU.

April 1, 2022, ©. Leeham News: Last week, we looked at how to store hydrogen in an aircraft. We could see the gaseous storage of hydrogen is too heavy other than for demo systems and extreme short-haul. For… Read More

Bjorn’s Corner: Sustainable Air Transport. Part 12. Hydrogen storage.

March 25, 2022, ©. Leeham News: Last week, we looked at the energy density by mass and volume for hydrogen and regular Jet fuel (Kerosene), Figure 1. With this information, we now look at how these fuels can… Read More

Bjorn’s Corner: Sustainable Air Transport. Part 11. Hydrogen and SAF.

March 18, 2022, ©. Leeham News: In our series, we have now seen the major limitations batteries as an energy source impose on an airliner and that hybrids work but don’t bring any advantages for an airliner. The… Read More

Bjorn’s Corner: Sustainable Air Transport. Part 8. Serial Hybrids.

February 25, 2022, ©. Leeham News: This is a summary of the article Part 8P. Serial Hybrid, the deeper discussion. We take an ES-19 type of battery aircraft and add a range extender to avoid the inadequate range… Read More

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