The aircraft is called the X-51A WaveRider and the word fast doesn’t do it justice.
When the unmanned rocket plane was released from beneath a B-52 bomber over the Pacific Ocean it kicked in engines that carried it to mach 5.1 or 3,880 MPH.
That means the craft could make the trip from Los Angeles to New York in under an hour.
It might be cramped though, in its current configuration there isn’t room for a flight attendant.
The Air Force has been working on hypersonic technology for over 50 years but it’s been slow going and difficult.
The X-51A has an engine that breathes air and has no moving parts. Once it reaches top speed it rides on its own sound wave leading its nickname WaveRider.
Charlie Brink is the program manager. He told the Los Angeles Times "it was a full mission success, I believe all we have learned from the X-51A WaveRider will serve as the bedrock for future hypersonics research and ultimately the practical application of hypersonic flight."
The future of the technology is unknown at the time as this was the last flight and there are no follow up programs funded or set to begin.