The file 'Retro Style Rocket 3D Printer Model' is (stl) file type, size is 412.1KB.
Here is a retro style rocket I made in TinkerCAD. I printed with a 5mm brim, one part was wobbly as it printed but worked out. Maybe a 10mm brim would have been beter. No other type of support was used.
Rocketship.stl | 1001.6KB |