In July 2017, Richard Branson suggested that the craft was to begin powered tests at three-week intervals. In September 2017, CEO George Whitesides suggested that engine testing was complete, and that only a "small number of glide flights" remained before VSS Unity would begin powered test flights. The first powered flight test took place on 5 April 2018 when a 30-second rocket firing accelerated Unity to a speed of Mach 1.87 and an altitude of 84,271 ft (25,686 m). The first powered test flight of Unity exceeded the altitude of all powered test flights of its predecessor, Enterprise.
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The flight was initially claimed to be successful but it was later revealed Unity briefly stepped outside the airspace that had been reserved for it and the FAA were not informed as required. The FAA grounded Virgin Galactic's space planes before allowing a resumption of flights after some changes to procedures including reserving a larger volume of airspace.[49]
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Jonathan McDowell [@planet4589] (29 June 2023). "Galactic 01 stats: launch 1528:38 UTC, apogee 85.1 km, flight time from drop to main gear touchdown 13m50s. Drop location EBR P3 in my launch points list (107.0W 33.3N)" (Tweet) – via Twitter. /wiki/Jonathan_McDowell
Jonathan McDowell [@planet4589] (10 August 2023). "I don't quite agree with these numbers. I have takeoff of White Knight 2 at 1429:45 UTC (in agreement with their 8.30 am MDT) but landing of SS2 at 1532:48 UTC (9.32 am MDT). Release time 1517:10 UTC and SS2 free flight time 15:38 with apogee 88.5 km" (Tweet) – via Twitter. https://x.com/planet4589/status/1689783764639961089
Jonathan McDowell [@planet4589] (8 September 2023). "Virgin Galactic few Spaceship Two mission Galactic 03 on Sep 8. VMS Eve took off at 1434 UTC and dropped VSS Unity over the usual drop point (EBR P3 in my list) at about 1522:13 UTC. Unity boosted to 88.6 km apogee and landed at Spaceport America at 1535 UTC" (Tweet) – via Twitter. https://x.com/planet4589/status/1700249597845913634
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Jonathan McDowell [@planet4589] (26 January 2024). "The @VirginGalactic Galactic 06 mission was launched from the WK02 carrier plane at 1742:05 UTC Jan 26 following takeoff around 1700 UTC. After a one minute rocket burn, SS2 reached an apogee of 88.8 km and landed after an approximately 14 minute free flight. (1/2)" (Tweet) – via Twitter. https://x.com/planet4589/status/1750973689204764824
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The SpaceShipTwo vehicles (like VSS Unity) were originally designed for 8 people, 6 passengers and 2 pilots, so whether this flight was fully-crewed is debatable. But it is true that at the time of this flight, only 6 seats (4 passengers, 2 pilots) were installed in VSS Unity, so in this sense this flight was fully-crewed. Also, no SpaceShipTwo vehicle, VSS Unity in particular, ever had more than 6 seats installed and never flew with more than 6 people (2 pilots, 4 passengers) onboard, so in this sense this flight was also fully-crewed. /wiki/SpaceShipTwo
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"Virgin Galactic completes successful spaceflight". Virgin Galactic (Press release). 25 May 2023. Retrieved 25 May 2023. https://www.virgingalactic.com/news/virgin-galactic-completes-successful-spaceflight
"Virgin Galactic completes Unity 25 spaceflight in key final test before commercial service". CNBC News. 25 May 2023. https://www.cnbc.com/2023/05/25/virgin-galactic-unity-25-spaceflight-final-test-before-commercial-service.html
Jonathan McDowell [@planet4589] (29 June 2023). "Galactic 01 stats: launch 1528:38 UTC, apogee 85.1 km, flight time from drop to main gear touchdown 13m50s. Drop location EBR P3 in my launch points list (107.0W 33.3N)" (Tweet) – via Twitter. https://x.com/planet4589/status/1674445777425293312
Jonathan McDowell [@planet4589] (10 August 2023). "I don't quite agree with these numbers. I have takeoff of White Knight 2 at 1429:45 UTC (in agreement with their 8.30 am MDT) but landing of SS2 at 1532:48 UTC (9.32 am MDT). Release time 1517:10 UTC and SS2 free flight time 15:38 with apogee 88.5 km" (Tweet) – via Twitter. https://x.com/planet4589/status/1689783764639961089
"Core memory unlocked. Welcome to space, #Galactic03. Congratulations, 014, 015, and 016!". X (formerly Twitter). Retrieved 8 September 2023. https://twitter.com/virgingalactic/status/1700170319343112596?s=20
"Virgin Galactic completes fifth successful flight in five months". Virgin Galactic (Press release). 6 October 2023. Retrieved 7 October 2023. https://www.virgingalactic.com/news/virgin-galactic-completes-fifth-successful-spaceflight-in-five-months
"Virgin Galactic Completes Sixth Successful Spaceflight in Six Months". Virgin Galactic (Press release). 2 November 2023. Retrieved 3 November 2023. https://www.virgingalactic.com/news/virgin-galactic-completes-sixth-successful-spaceflight-in-six-months