The file 'Simple Balloon Rocket Nozzles V2 3D Printer Model' is (stl) file type, size is 1.2MB.
This is an upgraded version of the V1 rockets. I added a lip for the balloon to be able to grip onto and fins to give it a "rocket" feel. Also the heavier design help keep the rocket oriented upward. I have a video on these rockets below.
Here's the video:
https://youtu.be/1a7a2smADdQ
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https://www.youtube.com/channel/UCXpQFRoqortkLdx9-BpbfwQ
Balloon_nozzle_with_fins.stl | 4.2MB |