LOUISVILLE, Ky. (WDRB) -- NASA has unveiled plans for a greener airplane.

The fully electric plane concept is called the X-57 or "Maxwell." The aircraft would have 14 electric motors along the wings.

NASA says Maxwell could be on the runway within four years. The administration hopes to follow that aircraft up with a series of five bigger planes, capable of holding passengers and cargo.

The project is part of NASA's $790 million "New Aviation Horizons" initiative for quieter and cleaner airplanes.

"With the return of piloted X-planes to NASA's research capabilities -- which is a key part of our 10-year-long New Aviation Horizons initiative -- the general aviation-sized X-57 will take the first step in opening a new era of aviation," said NASA Administrator Charles Bolden.

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