Another addition to the H2O Rocket thing, parts to convert an ordinary PVC pipe in to a rocket.
Check out the launcher and other rockets here: https://www.thingiverse.com/Superbeasti/collections/h2o-rocket
The parts are designed to fit to a 36mm ID and 40mm OD PVC pipe. The fins are adjustable in position and you can twist one of the Locking Rings slightly to alter the rockets behavior in air. Do not glue the fins and the Locking Rings as they are meant to be replaceable if they break. Also, use the heavy duty Mount from the H2O Rocket set.
Let me know if you want the parts for a different diameter pipe!
Check out my other designs here: https://www.thingiverse.com/Superbeasti/designs
das Filament PETG