Bjorn’s Corner: Sustainable Air Transport. Part 4. Reality checks.

By Bjorn Fehrm

January 28, 2022, ©. Leeham News: Having discussed where investments would be the most efficient in alleviating our Greenhouse gas problems and identified the low-hanging fruit, we now look at new technology airplanes that can improve the situation.

We start with classical airliners, working our way from small types to the largest, then we discuss the impact of new transport forms like VTOLs for short-haul transportation.

As we will use the Leeham Aircraft Performance Model in some of the work, there will be extra articles (for this one, a Part 4P) which are Paywall, where we use the model to generate deeper data and understanding.

Figure 1. The Alice nine-seater drawings from Eviation’s Web. The present drawing (dark blue) differs from the mid-2021 drawing (light blue, on top). Source: Eviation and Leeham Co.

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Bjorn’s Corner: Sustainable Air Transport. Part 4P. Reality checks, the deeper discussion.

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By Bjorn Fehrm

January 28, 2022, ©. Leeham News: This is a complementary article to the Part 4. Reality Checks article. It uses data from Leeham Company’s Aircraft Performance Model to develop the relationship between OEW (Operational Empty Weight) and MZFW (Maximum Zero Fuel Weight) compared with MTOW (Maximum Take-Off Weight) for 74 airliners in the model.

The article also discusses in more detail what’s the reasons behind large weight misses for new projects and how it’s handled.

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Eviation announces firm configuration for battery-powered 9-seater

By Bryan Corliss
July 1, 2021, © Leeham News: Seattle-area electric aircraft builder Eviation revealed Thursday that it has reached firm design configuration for its battery-powered, nine-seater Alice aircraft.

The announcement – which typically would signify that Eviation designers have locked-in design features, so that suppliers can use their drawings to begin work on their components – is more of a formality, however.

Eviation Executive Chairman Roei Ganzarski said suppliers already have delivered shipsets for the first production Alice, and mechanics at the company’s Arlington, WA, plant have begun final assembly.

“The plane is being built as we speak,” Ganzarski said. The company is on track for a first flight before year’s end, he added.

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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.

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Pontifications: Electric aircraft builder poised to start production near Everett

By Bryan Corliss
Jan. 18, 2021 © Leeham News
— Western Washington aviation enthusiasts may need to send out an extra Valentine this year, addressed to Alice – the nine-passenger electric aircraft being developed by Eviation.

Sometime around Valentine’s Day, mechanics should begin assembling the first production Alice at the company’s new final assembly site in Arlington (WA), about 20 miles north of Boeing’s Everett facility.

“We are literally setting it up,” said Eviation Chairman Roei Ganzarski, last week from one of the two hangars that the company has taken over at Arlington Municipal Airport, as equipment boomed in the background. “We’re putting in fixtures and furniture and paint.”

Ganzarski said his plan is to have the first production aircraft ready to start flight tests for FAA certification this summer – assuming that both Eviation and magniX, the company providing the electric motors to power the craft – are able to stand up new facilities, complete their initial hiring and get the first shipsets assembled on time.

“What an exciting year 2021 is going to be,” Ganzarski said.
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magniX adds third customer for its electric engines

June 19, 2019, © Leeham News: AeroTEC and the electric motor airplane company magniX said today they have teams to retrofit the Cessna Grand Caravan with a 750 hp  powerplant, converting the single-engine PT-6-powered turbofan from “gas guzzling, emissions-creating engine,” says magniX’s CEO Roei Ganzarski.

The announcement was made during the third day of the Paris Air Show.

The Caravan carries about 10 passengers, a combination of passengers and cargo or serves as a cargoliner. FedEx uses the airplane extensively.

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