The plane, designed by engineers in Washington state and Israel, is powered by 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.
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.
The company's goal is to show such electric planes are viable as commuter aircraft flying at an altitude of about 15,000 feet (4,572 meters). If the Federal Aviation Administration eventually certifies the small airplane to carry passengers, it could become the first all-electric commercial airplane
Source: The Seattle Times