This mechanism was developed to provide automatic staging of multi-stage water rockets. This mechanism will release a sustainer with a standard 9mm Gardena nozzle when the booster stops producing thrust.

The following tutorial describes how to build the staging mechanism. It should be used more as a guide rather than an exact step-by-step procedure as it is likely you will not have access to the identical parts used here. Feel free to substitute components as you see fit.

NOTE: Read the tutorial carefully including the notes at the end as there are important bits of information that you will need.

Step 1:

This stager is designed to work with a standard 9mm Gardena nozzle. If you don't have one already, you will need to make the nozzle first. Here's how: Making a Gardena nozzle.

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