Bottle Rocket

DIY Bottle Rocket for Kids – Easy Hardware Store & 3D-Printed Build

I built this bottle rocket for my godchildren using easily accessible materials from a hardware store and a few simple 3D-printed parts. It's a fun and educational project that combines physics, engineering, and outdoor fun!

Parts List

You’ll need the following components:

• 2x Gardena 2917-20 (hose connector)
• 1x VARIOSAN 17857 (brass coupling)
• 1x Reinforced hose (3/4" nut x 3/4" nut with bow)
• 1x 1-liter cola bottle (rocket body)
• 10x Screws
• ~10m Cord (for launch mechanism)
• ~40x40 cm Fabric (for parachute)
• ~50x30 cm board

3D Printing & Assembly Recommendations

For best durability and performance, use the following materials and techniques:

• Fins ("BottleRocketWings.3mf") → Print in TPU (PLA is too brittle and will break upon landing).
• Gardena Adapter ("BottleRocketGardena.3mf") → Print in ASA or PETG (PLA can't withstand high pressure).
• Gardena Adapter ("BottleRocketGardena.3mf") → Print with the tip pointing downwards to ensure good sealing
• Nose Cone → PLA is fine.
• Parachute & Nose Cone Attachment → Use hot glue to attach a small hook for securing the nose cone and parachute.
• Seals → Use standard Gardena O-rings to improve the seal on "BottleRocketGardena.3mf" for better pressure retention.

This setup ensures a sturdy and reusable bottle rocket that can withstand multiple launches. Let me know if you have any questions or improvements! 🚀