This is a flying semi-scale model of the Viking sounding rocket, which was developed by the US to provide a better vehicle than the German V2. In the 1950's, several of the Viking rockets were designed and flown by the US Navy. As part of a scientific mission, the Viking 7 climbed to 136 miles, and beat the altitude record of the V2. This rocket flies to more reasonable altitudes on a cluster of 2 model rocket motors. Try two B's for a smaller launch site, or go wild with two C motors. This rocket requires 3/16" Launch Rod and compatible launch system. Requires (not included) Assembly, Wood glue, Medium CA Glue, Hobby Knife, Sandpaper, Masking Tape, Primer and Paint needed to build this rocket. Launch system with 3/16" Launch rod, Launch Controller and Rocket Motors needed to launch this rocket and are not included. The following Estes rocket motors can be used: 2 x B4-4, 2 x B6-4 (First Flight), 2 x C6-5