thingiverse
This rocket model has two different bases. 1 base for A, B, or C motors & a second base for D motors. The fit is tight enough to eliminate the need for glue. The honeycomb beneath the engine bay can be easily removed with a small pliers or utility knife. I've only built this model in PLA at 0.25mm & 0.50mm step but ABS should work also.
Please be careful and only launch rockets under adult supervision. Don't shoot your eye out ;).
Direct link to the original creator's page
Click the "View on thingiverse" button above to visit the original model page on thingiverse. You can download the STL file directly from the creator's page for free.
This STL file is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
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Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer. Check the license on the original thingiverse page to see if modifications are permitted by the creator.