Wednesday, September 28, 2022

Electric airplane prototype proof of concept flies in Washington State. An aviation first; but where will it go? Battery technology must move first.

 

Seattle Times reporting:

First all-new, electric commuter airplane takes flight at Moses Lake

Updated Sep. 27, 2022

The plane took two wide turns around the airfield, climbing to 3,500 feet. As it passed directly overhead, people on the ground heard a whirring buzz, a fluttering of air from the propellers at the rear of the fuselage.

The plane landed safely just eight minutes later. As it taxied in to the terminal, it gave a couple more loud buzzes when the pilot revved the motors.

The plane, built to carry nine passengers and one or two pilots, was designed and built by Arlington-based startup Eviation to demonstrate the potential for an electric commercial commuter aircraft flying a few hundred miles between cities at an altitude of around 15,000 feet.

It’s powered by just over 21,500 small Tesla-style battery cells that, at just over 4 tons, make up fully half the weight of the carbon composite airframe.

They drive electric motors designed and built by MagniX in Everett.

The technology is pioneering and puts this region at the forefront of efforts to develop a zero-emission, sustainable era in aviation. But whether it can deliver the economic returns necessary to become a commonplace mode of air travel remains highly uncertain.

In an interview in Moses Lake on the eve of first flight, Eviation CEO Greg Davis conceded that the prototype that took off Tuesday is not the design the company will build later.

He said Eviation needs still-to-be-developed advances in battery technology to make its planes commercially viable.

[...]

As with automobiles, battery technology is the hanging point. For an aircraft the power-to-weight ratio is even more critical. Yet, takeoff, flight at 1000 meters, and landing all on battery power is a landmark achievement.