By Bjorn Fehrm
March 10, 2023, ©. Leeham News: This is a complementary article to New aircraft technologies. Part 3. Airframe improvements. It discusses in detail the areas of an airliner airframe where tangible improvement can be made to make it more efficient and thus lower cost combined with less Green-House-Gas (GHG) emissions.
March 3, 2023, ©. Leeham News: We started a series last week that will look at what environmental and air traffic economy improvements we can get with traditional aeronautical technology developments.
Before we look at technology, we must define what air transport market has the highest impact from changes. Useful technology developments are not necessarily the same for Regional, Narrowbody, or Widebody aircraft.
February 24, 2023, ©. Leeham News: In the Sustainable Air Transport series we finished last week, we described new aircraft technologies developed to reduce Green House Gas (GHG) emissions.
There was one area we didn’t discuss, the progress on conventional technologies to reduce the fuel burn of an airliner.
We now start a series, digging deeper into what we can do with conventional technologies to reduce the fuel burned per passenger kilometer and, thus, GHG emissions.
February 17, 2023, ©. Leeham News: Last week, we summarized that SAF is the short-term solution for GreenHouse Gas (GHG) reduction for Air Transport, and hydrogen is the longer-term solution for up to medium-haul flights.
What about battery and hybrid aircraft? It’s the go-to solution for ground transport (except for long-haul trucks, which are going hydrogen, Figure 1)?
By Bjorn Fehrm
Feb. 16, 2023, © Leeham News: Last week, we looked at the ticket price influence if airline fuel costs would increase going forward, either through increased use of Sustainable Aviation Fuel, SAF, or higher environmental emission fees.
We realized that ticket prices have other parts than fuel and aircraft-related costs. For instance, an airline has sales and marketing, administration, and airport ground staff. We got an overview of such cost parts depending on whether the airline was a mainline carrier or a Low-Cost Carrier (LCC).
Now we use this knowledge and our airliner performance and cost model to check the influence of varying fuel and emission costs on ticket prices going forward.
February 10, 2023, ©. Leeham News: We started the present series around Sustainable Air Transport on the 7th of January 2022, more than a year ago. During this time, we have covered a lot of subjects regarding the emissions from Air Transport.
It’s time to wrap up the series and summarize what we covered and learned.
By Bjorn Fehrm
Feb. 9, 2023, © Leeham News: I have the last weeks described the difference between Jet fuel and SAF, or Sustainable Aviation Fuel, in my Friday Corners. We could see it has emission advantages compared with fossil Jet fuel that goes beyond the CO2 reductions it offers.
It’s a cleaner fuel where the production methods can avoid the troublesome aromatic carbon molecules that causes soot to form in jet engine exhaust. With reduced soot, the generation of contrails reduces, which is beneficial for reducing global warming.
But we could also see that SAF should be costlier to produce as the production cycle is complete. Our fossil fuel’s raw material had their CO2-absorbing plant growth millions of years ago.
So, if we mix SAF into Jet fuel at different ratios, what will be the effect on ticket prices? How much more expensive would flying be when we use SAF or other measures like CO2 emission taxes are introduced? We use our airliner performance and cost model to find out.
February 3, 2023, ©. Leeham News: We’ve gone through the composition of Sustainable Aviation Fuel, SAF, its production, and its cost. We’ve also discussed its effect on CO2 emissions from Air Transport.
An important part of SAF’s advantages is its effect on non-CO2 emissions. It stems from its low content of Sulphur and Aromatic hydrocarbons.
January 27, 2023, ©. Leeham News: Last week, we learned the main pathways to Sustainable Aviation Fuel and their production volumes for the next years.
Now we look at the feedstocks, what output we get from these, and how to safeguard the pathway is ethical and sustainable. Finally, we look at the cost of SAF until 2050.
January 20, 2023, ©. Leeham News: Having introduced Sustainable Aviation Fuel, SAF, as essential for reducing Green House Gases (GHG) until 2050, we now look at how SAF is produced, what pathways from feedstock to SAF are the main ones, and what are the short and long-term potentials of the different pathways.
I was helped to grasp the area by Neste’s EVP of Renewable Aviation fuel, Thorsten Lange, who, after we met when he presented at the Airbus Summit in November (Neste is a leading SAF producer), took the time to explain the subject to me last week. He also recommended a report we use to understand SAF.