Beautifully detailed model of an Atlas V 551 launch Vehicle. Atlas V is an expendable launch system operated jointly by Lockheed Martin and Boeing (United Launch Alliance). The designation number (551) refers to its lift properties. 1st number -= 1st stage diameter (5 Meters in this case); 2nd number = number of boosters strapped on for added thrust power (5) and 3rd number = number of engines on the second stage (1)
