Thor Delta A – McDonnell Douglas Family: Thor meters Length: 31 meters Diameter: 2.44 meters Launch Mass: 50 Low Earth Orbit Capacity: 250 The Thor Delta A was manufactured by McDonnell Douglas with the first launch on 1962-10-02. Thor Delta A has 0 successful launches and 0 failed launches with a total of 0 launches. American orbital launch vehicle family with Thor first stage and a delta second stage. 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.