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6 days ago | 
leehamnews.com | Bjorn Fehrm
May 9, 2025, ©. Leeham News: We do a Corner series about the state of developments to improve the emission situation for Air Transport. We try to understand why development has been slow. Since we started in October last year, we have looked at:Alternative, lower emission propulsion technologies, ranging from electric aircraft with batteries as energy source, different propulsion hybrids, and new concepts for Jet-fuel and Hydrogen gas turbine engines.
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1 week ago | 
leehamnews.com | Bjorn Fehrm
Does an A220-500 need a new wing and engines? Part 2. Subscription requiredBy Bjorn FehrmMay 5, 2025, © Leeham News: We started the articles series about stretching the A220 to a capacity in the A320neo range last week by going through the development of the A220-100 and -300, how it’s designed and compares to the competition in the 100 to 140 seat segment.
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1 week ago | 
leehamnews.com | Bjorn Fehrm
May 2, 2025, ©. Leeham News: We do a Corner series about the state of developments to improve the emission situation for Air Transport. We try to understand why development has been slow. We have since we started in October last year looked at:Alternative, lower emission, propulsion technologies, ranging from electric aircraft with batteries as energy source, different propulsion hybrids and new concepts for Jet-fuel and hydrogen gas turbine engines.
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2 weeks ago | 
leehamnews.com | Bjorn Fehrm
May 1, 2025, © Leeham News in Toulouse: Airbus CEO Guillame Faury and CFO Thomas Toepfer presented the Airbus 1Q2025 results yesterday. All Airbus divisions performed to plan, producing a group EBIT Adjusted of 0.6bn Euro. The company delivered 136 aircraft, which was to plan. The lower deliveries than last year (142) were due to CFM’s extra delivery efforts in 4Q2024, leading to fewer LEAP deliveries for 1Q2025. EBIT at €0.5bn and Free Cash Flow at -€0.3bn were also as planned.
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2 weeks ago | 
leehamnews.com | Bjorn Fehrm
Does an Airbus A220-500 need a new wing and engines? Subscription requiredBy Bjorn FehrmMay 1, 2025, © Leeham News: For years, the debate has been going on about when Airbus will complement the A220-100 and -300 with a longer, higher-capacity A220-500. In fact, the Bombardier team that designed the A220 as the CS300 already foresaw the prospect of a longer -500.
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2 weeks ago | 
leehamnews.com | Bjorn Fehrm
April 25, 2025, ©. Leeham News: We do a Corner series about the state of developments to improve the emission situation for Air Transport. We try to understand why development has been slow. Over the last Corners, we examined the non-CO2 effects of Air Transport that contribute to global warming. Contrails had the largest effects, even larger than the CO2 emissions from Air Transport.
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3 weeks ago | 
leehamnews.com | Bjorn Fehrm
Subscription requiredBy Bjorn FehrmApril 24, 2025, © Leeham News: We started looking at the future COMAC C929 widebody 10 days ago. The C929 development has gone through a number of challenges, the first being how to structure the cooperation between China’s COMAC and Russia’s United Aircraft, with the latest being what engines to use for the aircraft. The first problem was solved by COMAC deciding to go it alone, whereas the last problem around engines has no definite solution yet.
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3 weeks ago | 
leehamnews.com | Bjorn Fehrm
April 18, 2025, ©. Leeham News: We do a Corner series about the state of developments to improve the emission situation for Air Transport. We try to understand why development has been slow. We examine the non-CO2 effects of Air Transport that contribute to global warming. Over the last weeks, we have looked at contrails, which have the largest impact on global warming, larger than CO2, Figure 1. NOx is a smaller contributor, but it contributes about 20% of the total to Global Warming.
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1 month ago | 
leehamnews.com | Bjorn Fehrm
Subscription requiredBy Bjorn FehrmApril 14, 2025, © Leeham News: The COMAC C919 is finding its first customers outside China. At the same time as COMAC has started work on shorter and longer versions of the C919, work on a widebody C929 has been going on for the last 14 years. If the development of more family members for the single aisle C919 is straightforward, the widebody C929 development has presented several challenges. Figure 1. The C919 COAMC widebody aircraft. Source: COMAC.
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1 month ago | 
leehamnews.com | Bjorn Fehrm
April 11, 2025, ©. Leeham News: We do a Corner series about the state of developments to improve the emission situation for Air Transport. We try to understand why development has been slow. We now examine the non-CO2 effects of Air Transport that contribute to global warming. Of these, contrails have the largest impact, Figure 1. In the last Corner, we described encouraging results from airline flight trials with warming contrail avoidance.
