Leeham News and Analysis
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Bjorn’s Corner: The challenges of hydrogen. Part 24. Propulsion choice
By Bjorn Fehrm
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 analyze the propulsion side this week.
Figure 1. A SAFRAN concept for a low emission airliner from its Clean Sky 2 presentation. Source: SAFRAN.
Bjorn’s Corner: The challenges of hydrogen. Part 23. Hydrogen fuel cells
By Bjorn Fehrm
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 types of fuel cells and for what applications these are suited.
Figure 1. The principle of a hydrogen fuel cell. Source: Airbus.
Bjorn’s Corner: The challenges of hydrogen. Part 22. Hydrogen fuel cells
By Bjorn Fehrm
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 shift is manageable for a short-range aircraft (range below 2,000nm).
Now we spend the next Corners diving into hydrogen fuel cell technology and how it can benefit a hydrogen-fueled airliner.
Figure 1, The principle of a hydrogen fuel cell. Source: Airbus.
Bjorn’s Corner: The challenges of Hydrogen. Part 10. Airbus’ Hydrogen ZEROe concepts
September 25, 2020, ©. Leeham News: In our series on Hydrogen as an energy store for airliners, we look at the three hydrogen-based concept aircraft Airbus presented this week.
They are called ZEROe and are concepts and not products, but their design tells us a lot about where Airbus is with its studies and how the hydrogen demonstrator aircraft might look like come 2026-2028.
European Regionals Face Hostile Operating Environment
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By Kathryn B. Creedy
Third in a Series. Previous articles:
- The future of regional jets is limited by choices, Scope Clause
- US Regional Consolidation Began Before Covid
Introduction
Aug. 31, 2020, (c) Leeham News: European regionals face far greater challenges than Covid and, sadly, much of what is happening to the industry is beyond its control. The result is similar to failures seen in the U.S. Flybe’s recent loss resulted from pre-Covid problems which also led to the pre-Covid failures of such airlines as Flybmi and Cobalt.
The failures illustrate, however, the three reasons why European regionals are so fragile – low-cost competition, geography, and challenging government policy.
Flybe is just the latest of many regionals to cease operations owing to harsh conditions in Europe.
Summary
- Government Policies Hardest on Regionals
- LCC Competition Challenging
- Consumer Protections Crushing
- Turboprops Have Large Role
Bjorn’s Corner: The challenges of Hydrogen. Part 2. Ecosystem.
By Bjorn Fehrm
July 31, 2020, ©. Leeham News: In our series on Hydrogen as an energy store for airliner use we begin by looking at the needed ecosystem that can produce and distribute Hydrogen.
When I was skeptical about hydrogen as a means to propel our airliners three years ago, the main problem was the lack of this ecosystem. That year, in 2017, 13 transport and energy companies formed the Hydrogen Council, to create this ecosystem. Today the council has 81 members, with 22 joining in the last year, Figure 1. The list reads as Who’s Who in the transport and energy sector.
Figure 1. Members of the Hydrogen Council. Source: Hydrogen Council.
France to invest 15 billion Euro in its aeronautical industry
By Bjorn Fehrm
June 10, 2020, ©. Leeham News: France presented a 15 billion Euro support plan for the French aeronautical industry yesterday, to help the industry overcome the effects of the COVID-19 pandemic.
The plan has three focus areas:
- safeguard the employment of the 300,000 employed in the French aero industry
- transform the supplier network to a more robust structure
- and perhaps most interesting, set the direction for the industries’ next aircraft projects
The French Finance Minister announces the plan. Source: France 24.
Bjorn’s Corner: Why e in ePlane shall stand for environment, Part 17. High hanging fruit.
April 10, 2020, ©. Leeham News: We have since December 13, discussed why e in ePlane should not stand for electric and covered a lot of areas explaining why electric aircraft or hybrids are not the best way to environmentally friendly air transport.
We now recap what we learned and then wrap the series.
Figure 1. The Gartner hype cycle. Source: Wikipedia.
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 during the whole flight. A fuel (alternate, fossil, or hydrogen) consumes during the flight. You gradually fly a lighter aircraft. Let’s see how this affects the aircraft’s efficiency.
Figure 1. Embraer’s E175-E2, a latest-generation 88 seater jet used for our example. Source: Embraer.
Bjorn’s Corner: Why e in ePlane shall stand for environment, Part 12. Battery risks.
March 6, 2020, ©. Leeham News: We use this week’s Corner to discuss the safety hazards a change to an Electric or Hybrid-Electric airliner introduces.
The trigger is two battery fires in six weeks for the electric aircraft prototypes which are now flooding the market.
Figure 1. Eviation’s Alice battery-driven prototype. Source: Eviation