Thorad SLV-2G Agena D – McDonnell Douglas Family: Thor meters Length: 32.9 meters Diameter: 2.44 meters Launch Mass: 91 Low Earth Orbit Capacity: The Thorad SLV-2G Agena D was manufactured by McDonnell Douglas with the first launch on 1966-08-09. Thorad SLV-2G Agena D has 0 successful launches and 0 failed launches with a total of 0 launches. Thor-Agena was a series of orbital launch vehicles. The rockets used Thor first stages and Agena second stages. They are thus cousins of the more-famous Thor-Deltas, which founded the Delta rocket family. 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.