fi 50mm rocket

thingiverse

3D Printed Rocket Model Designed according to the FAI B-class rocket standards, this model features a shorter 50mm body part due to the reduced volume of the Ender 3. The design utilizes a BT-20 motor tube or a paper tube wound on an 18mm mandrel as a motor-tube, approximately 15cm in length, to shield the body-tube from hot gases. The connecting ring is first glued with super-glue to the lower cone and then to the body-tube. Multiple body-tubes can be used to create a longer rocket, connected by the ring and secured with super-glue. A "nose-cone attachment" was printed and glued to the nose-cone using super-glue for secure bonding. The nose-cone is printed with 5% infill density. The body tube, lower cone, and connecting ring are printed in a spiral or vase mode with one perimeter (0.4mm) thickness. Fins are printed with 100% infill and lie on their sides. Body-tubes, connecting rings, and nose-cones require sanding on the side that lies on the printer bead, as this area tends to be slightly wider. Three or four fins can be attached using super-glue for added stability. This model was printed in PLA but will also be tested with PET-G for enhanced heat resistance. B-4-4 and C-6-5 motors were successfully tested with this rocket design, resulting in a great flying experience.