The [VMS Eve](https://en.wikipedia.org/wiki/VMS_Eve) mothership releases the [VSS Unity](https://en.wikipedia.org/wiki/VSS_Unity) spacecraft [after ca. 48 minutes](https://space.stackexchange.com/a/49089/1111). The total duration is [approximately 2 hours](https://web.archive.org/web/20201226033350/https://bis-space.com/membership/voyage/VoyageIssue8-Virgin%20Galactic.pdf). As aresult, the ascent time + the descent time that the Virgin Galactic's spacecraft takes is about 72 minutes, but I wonder what the breakdown between the ascent time and the descent time is.