Green aviation topics such as sustainable aviation fuels and hydrogen power. Also, airline flight cancellations due to weather and staff shortages, flight automation for non-pilots, the F-15EX engine competition, FAA and FCC disagreement on 5G interference for pilots, a possible national no-fly list for unruly passengers, and interviews from the 2021 Pacific Air Show.

A number of Cessna piston-powered aircraft are now approved for 91-octane unleaded (91UL), 94UL, or 100VLL (very low lead) fuel. Textron Aviation announced this for the Cessna 172 Skyhawk and 182 Skylane. The 206 Turbo Stationair HD aircraft is now approved for 100VLL. These fuels are cleaner burning compared to others with higher lead levels.

The short answer: maybe 3 or 4 decades. There are issues with carrying the fuel onboard a large commercial aircraft, creating the infrastructure, and price. SAF, or sustainable aviation fuels, is a much shorter-term step.

Biodiesel is in high demand and Government incentives are helping ramp up production significantly. A third of all soybean oil produced in the U.S. already goes to make biodiesel. This is putting pressure on feedstocks, like soybean oil, which costs around a dollar per pound now. Last year it was $0.35.

Weekend staff shortages and bad weather were blamed for the cancellations. American reported that 376 flights were canceled on Friday, October 29, 551 flights were canceled on Saturday, and 480 more on Sunday. FlightAware said American has delayed more than 1,000 flights since Friday. About 1,800 flight attendants are scheduled to return from leave. The airline recently hired over 600 more and plans to start them by the end of December.

California start-up Skyryse developed FlightOS, a system that allows non-pilots to fly aircraft. Skyryse is backed by $250 million in funding and the system uses sensors such as cameras and radar.

The first lot of eight F-15EX fighters were powered by the competing GE F110-129 engine. The Air Force announced that the engine will continue to power the F-15EX. The firm-fixed-price deal could be for up to 329 engines. Deliveries will start in October 2023 and run through June 2031

In FAA Plans Warnings to Pilots, Airlines Over New 5G Rollout, the Wall Street Journal says the FAA is preparing a Special Airworthiness Information Bulletin and an airworthiness directive saying that cell towers transmitting 5G signals could affect certain automated features that help fly and land airplanes. Like radar altimeters. On the other hand, both the FCC and the telecom industry say there is no evidence the 5G signals will interfere with aviation.

Transportation Secretary Pete Buttigieg said that a no-fly list should be considered for violent airplane passengers.

There is absolutely no excuse for this kind of treatment of flight crews in the air or any of the essential workers—from bus drivers to air crews who get people to where they need to be.

Pete Buttigieg

Related: What Would it Take to Set Up a National ‘No-Fly’ List of Unruly Passengers?

The FAA gathered top U.S. airline executives for a meeting to discuss the problem of unruly passengers. The airlines were given a month to develop concrete “additional steps” that reduce such incidents. A national “no-fly” list used by all airlines was suggested by Delta, but others prefer that the issue is handled by law enforcement.

Brian Coleman attended the Pacific Air Show and spoke with a number of people, including Air Force Reserve Master Sgt Uscanga Harris, Ed, Gary with the US Coast Guard Auxiliary, Jay, and Stephanie.

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