Virgin Galactic’s second SpaceShipTwo rocket plane flew a smooth, supersonic test flight today during its first rocket-powered outing since the first SpaceShipTwo broke up three and a half years ago.
The craft christened VSS Unity has taken flight a dozen times since its debut in February 2016, but the previous 11 tests didn’t involve lighting up the plane’s hybrid rocket motor.
That’s what made today’s flight test at California’s Mojave Air and Space Port special: After carrying the plane and its two pilots to an altitude of about 46,500 feet, Virgin Galactic’s White Knight Two mothership, known as VMS Eve, released Unity from its underbelly.
Seconds later, the pilots turned on Unity’s engine for the first time.
It was at that point, back on Oct. 31, 2014, that things went wrong for Unity’s predecessor, VSS Enterprise. SpaceShipTwo’s wing-bending brake system was accidentally engaged while the rocket was firing, and aerodynamic forces caused the plane to break up.
The plane’s co-pilot, Michael Alsbury, was killed. Pilot Pete Siebold survived, thanks to his parachute, but was seriously injured during the breakup and fall.
In the years since then, Virgin Galactic has changed the SpaceShipTwo design and training routine to address shortcomings that were pointed up during the investigation.
Based on Virgin Galactic’s post-flight report, pilots Mark “Forger” Stucky and Dave Mackay encountered no serious problems this time around.
The rocket motor was fired for 30 seconds, significantly less than the full duration planned for spaceflight. That powered the plane upward at an 80-degree angle, at a top speed of Mach 1.87. The plane reached a maximum height of 84,271 feet (15.9 miles, or 25.7 kilometers), Virgin Galactic said.
“The flight has generated valuable data on flight, motor and vehicle performance which our engineers will be reviewing,” Virgin Galactic said.
Eventually, the company aims to conduct full-up tests to send Unity and its pilots to the edge of outer space, at altitudes that could range from 50 miles to 62 miles (100 kilometers) and beyond.
Once the test program is completed, the focus of operations will shift to Spaceport America in New Mexico. About 700 customers have already put down deposits for space tourism packages costing as much as $250,000. Virgin Galactic’s founder, British billionaire Richard Branson, says he intends to be on the first commercial flight.
“Space feels tantalisingly close now,” Branson tweeted after Unity’s landing.
Here’s how the test flight was documented on Twitter:
Our team is prepping for a #SpaceShipTwo flight test today pic.twitter.com/8dnqJV07oO
— Virgin Galactic (@virgingalactic) April 5, 2018
VSS Unity is the first #SpaceShipTwo in a fleet of spaceships proudly built by @TheSpaceshipCompany pic.twitter.com/3b18jkK7IX
— Virgin Galactic (@virgingalactic) April 5, 2018
VSS Unity has separated cleanly from VMS Eve and is flying free. #SpaceShipTwo #WhiteKnightTwo
— Virgin Galactic (@virgingalactic) April 5, 2018
Our pilots have ignited VSS Unity’s rocket motor for today’s planned partial duration burn. Pointing upwards and accelerating fast
— Virgin Galactic (@virgingalactic) April 5, 2018
Pilots have shut down rocket motor and preparing to raise tail-booms into the #SpaceShipTwo “feathered” re-entry position, for the downhill run
— Virgin Galactic (@virgingalactic) April 5, 2018
Feathers now lowered again and VSS Unity turning to Mojave for the glide home #SpaceShipTwo
— Virgin Galactic (@virgingalactic) April 5, 2018
VSS Unity went supersonic and will be landing shortly #SpaceShipTwo
— Virgin Galactic (@virgingalactic) April 5, 2018
Touch down. Congratulations Mark “Forger” Stucky and Dave Mackay for a great milestone test flight #SpaceShipTwo
— Virgin Galactic (@virgingalactic) April 5, 2018
.@virgingalactic back on track. Successful powered flight, Mach 1.6. Data review to come, then on to the next flight. Space feels tantalisingly close now.
— Richard Branson (@richardbranson) April 5, 2018
Today VSS Unity completed her first powered flight #SpaceShipTwo pic.twitter.com/Q0WDW6Z1v5
— Virgin Galactic (@virgingalactic) April 5, 2018
THAT WAS AWESOME! Congrats to the pilots, crew, ground crew and all the people who designed and built that beautiful ship. Look forward to doing it again! pic.twitter.com/2VHmMsu0sQ
— George Whitesides (@gtwhitesides) April 5, 2018
Today’s flight test is now complete as pilots Mike “Sooch” Masucci and Nicola Pecile have landed #WhiteKnightTwo back @MojaveAirport
— TheSpaceshipCompany (@TheSpaceshipCo) April 5, 2018
VSS Unity completed her first supersonic, rocket-powered flight this morning in Mojave, California. Another great test flight, another step closer to being #NMReady pic.twitter.com/hVde2oAZWt
— Virgin Galactic (@virgingalactic) April 5, 2018
Update for 12:13 p.m. PT April 6: This report has been updated with Virgin Galactic’s post-flight recap and a video feature on the flight.