via Tumblr http://bit.ly/267OEer NASA’s X-57 Hybrid Electric Research Plane via NASA http://go.nasa.gov/1QbU8kz
NASA’s X-57 Hybrid Electric Research Plane via NASA http://go.nasa.gov/1QbU8kz
via Tumblr http://bit.ly/267OEer NASA’s X-57 Hybrid Electric Research Plane via NASA http://go.nasa.gov/1QbU8kz
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