ARRO Rockets presents the launch of Gamma IV, a water rocket project that showcases a significant size increase compared to typical water rocket builds. The rocket is constructed from spliced soda bottles and common household materials, demonstrating the possibilities achievable with simple components and creativity.
The launch mechanism is straightforward, using a quick connect hose connection and a basic pulley system. For parachute recovery, the rocket employs a combination of modern electronics and simplicity. A microcontroller with an accelerometer detects the apogee and releases the parachute, which is ejected by another piece of soda bottle acting as a spring. Flight data is recorded on an SD card.
While the launch was successful, ARRO Rockets encountered challenges with friction on the launch rail. This issue was partially addressed by applying silicone spray to the rail. The root cause may be related to the rail button flexing on launch or changes in the pressurized bottles.