Thor Delta – McDonnell Douglas Family: Thor meters Length: 31 meters Diameter: 2.44 meters Launch Mass: 54 Low Earth Orbit Capacity: 226 The Thor Delta was manufactured by McDonnell Douglas with the first launch on 1960-05-13. Thor Delta has 0 successful launches and 0 failed launches with a total of 0 launches. American orbital launch vehicle. Commercial name for the military’s Thor-Delta. 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.