Leeham News and Analysis
There's more to real news than a news release.
Leeham News and Analysis
- Bjorn’s Corner: Air Transport’s route to 2050. Part 24. May 30, 2025
- Does an A220-500 need a new wing and engines? Part 3. May 29, 2025
- Boeing’s future depends on FAA approvals May 26, 2025
- Updated, May 29, 2025: Department of Justice, Boeing OK to Non-Prosecution Agreement May 23, 2025
- Bjorn’s Corner: Air Transport’s route to 2050. Part 23. May 23, 2025
Bjorn’s Corner: Flying revisited
By Bjorn Fehrm
April 09, 2015; I’m up for a challenge in the next weeks: I’ve been invited to fly an airliner. Having flown 14 aircraft types before it shouldn’t be so big news if it wasn’t for none of those types being close to the aircraft I will fly now, a modern civil airliner.
The previous types were military trainers, fighters and later civil sports and business aircraft. They are all more or less the same. Flying is like cycling and driving a car: it is something one learns and then doesn’t unlearn. So the flying part should be no problem.
It is not what makes me undertake weeks of preparations. It is that other thing, the aircraft’s computerized soul, that expects to be operated in a certain way. The buttons should be pressed and handles moved in the right order or the aircraft will tell me it doesn’t understand what I want.
So now I am reading through thousands of pages and flying civil airliner procedures day and night. We will dwell on how and why in a couple of Bjorn’s Corners. Read more
Bjorn’s Corner: Lighter fuselage materials and what they bring
April 02, 2015; There is different information whether Boeing will adopt new Aluminum Lithium based alloys for the fuselage of the up and coming 777X, our latest info is that this is not yet decided.
In this corner we will look at what is at stake should Boeing go the route of new materials or not. It will discuss what is to consider when choosing materials like Aluminium Lithium (AlLi) or Carbon Fiber Reinforced Plastic (CFRP) for aircraft structures, especially for fuselage structures which has many conflicting requirements.
We will see that aircraft fuselages are tricky to make light and that a stronger material not necessarily means weight gains.
Bjorn’s Corner: Two in cockpit makes sense
By Bjorn Fehrm
March 27, 2015; As we informed yesterday, the Germanwing’s co-pilot had a pause in his training at Lufthansa’s pilot school in Bremen during 2009. Further details have since been revealed by, among others, the Dusseldorf’s prosecutors office. The leave for Andreas Lubitz, the co-pilot that flew 4U9525 to ground, due to sickness, from pilot training in 2009 was a long one; sources talk about 18 months.