Thor Burner 2A – McDonnell Douglas Family: Thor Length: 23 meters Diameter: 2.44 meters Launch Mass: 50 The Thor Burner 2A was manufactured by McDonnell Douglas with the first launch on 1971-10-14. Thor Burner 2A has 0 successful launches and 0 failed launches with a total of 0 launches. The Thor-Burner was an American expendable launch system, a member of the Thor rocket family. It consisted of a Thor missile, with one or two Burner upper stages. Manufacturer McDonnell Douglas is a Commercial USA entity that was founded in and is administered by . McDonnell Douglas has 0 successful launches and 0 failed launches with a total of 0 launches.