The latest test flight of a prototype of spacecraft, nicknamed "Starhopper," which is said to be off the ground, as plumes of smoke engulfed a development site in South Texas.
It what's up to its highest "hop" test yet, to about 65 feet off the ground, and SpaceX set up a webcast for the event. But the attempt was aborted just moments after the rocket's massive engine fired up.
The vehicle appeared to be undamaged, and the SpaceX team considered moving forward with a second attempt.
Musk explained in a tweet that the "chamber pressure" in the rocket was "high due to colder than expected propellant."
When contacted by CNN Business Thursday, SpaceX spokesperson James Gleeson said
Starhopper is designed to be an early precursor to a deep-space exploration rocket called Starship. The prototype craft is meant to be "short-hauled" as part of the Starship development program. The tests are "designed to test the boundaries of the vehicle," said Kate Tice, a SpaceX engineer, on a live stream of the test Wednesday.
Starhopper has so far conducted two trial flights that brought the vehicle a tiny distance into the air while remaining tethered to the ground.
It's not clear when SpaceX tries to fire up Star Hopper for another trial run. Gleeson declined to comment.