This is a model loosely based on the R-7, the rocket which launched the Sputnik satellite. Derivatives of this rocket are still used today and are currently used to transport humans and supplies to the International Space Station, amongst many other uses. On the negative side, this was also the world's first ICBM. The model is designed to be spiral-printed. The STL file is of substantial resolution, so feel free to zoom in! Minor update: I've added a second STL which contains a model representing the engines. Print it 'normally' (not spiral) and glue it on the bottom of the main model. Both pieces are modeled in the updated scad file.