Musk's 2019 posts on flying car resurface after launch. Elon Musk's 2019 posts on flying car have resurfaced after Tesla launched Roadster, which can briefly fly using cold-gas thrusters. While replying to a video posted by a user, Musk had said, "The new Roadster will actually do something like this...Will use SpaceX cold gas thruster system with ultra high pressure air in a composite over-wrapped pressure vessel.".