F-35 Ejector Seat Tested At 600 MPH Before it takes to the sky, the F-35 ejector seat was tested on a 600mph rocket powered train. dannyj Community Contributor posted about a year ago Share 5 12 Tweet Email 2 Stumble Video available at: http://youtube.com/watch?v=aIz5z9VoLJU. Check out more articles on BuzzFeed.com! Share on Facebook