====== H2O_Rocket ====== |{{:h2o_rocket:state_diagram.png?800x654|pic can not be displayed}}|This is the state diagram of the water rocket.| ===== 19.01.2020 - First launch of the upgraded water rocket v2.0 ===== {{youtube>g4kU_LOwwg0?large}} Many improvements were made including * New fin design (mechanically much more robust) * Electronics payload compartment accommodating, accelerometers, gyroscopes, magnetometer, barometric pressure sensor, 2MP camera, LiPo battery and charge controller, a servo and a WiFi enabled ESP8266 32bit Microcontroller acting as the on-board computer * Spring loaded parachute, deployed at apogee using a servo (apogee is detected via the rockets attitude determined from magnetometer data) ===== 07.06.2020 - launch series of the upgraded water rocket v2.5 ===== {{youtube>8ACIOvbvEds?large}} The changed to the v2.0 model included * New 30'' nylon parachute (the bin liner version didn't support the acting forces) * Rubber band shock absorber in the parachute harness * Adjustments to the parachute release point * Improvements in the on-board software * changes to the nozzle design as the epoxy didn't withstand the pressure * rubber gaskets were added to the tornado couplings between the sections * added another bottle section (new volume → see below) * adjustment on the launchers nozzle latch to support the new nozzle design * repairs of damages due to rough landings from previous flights * higher pressure at launch up to 110 psi __Datasheet__ * total volume: 4.73 l * empty weight: 426 g * parachute diameter: 760 mm * nozzle diameter: 9 mm * height: 1320 mm ===== Date TBD - launch series of the upgraded water rocket v2.6 ===== The changes planned include * increased nozzle diameter of 10 mm (drilled open) * Improvements in the on-board software * increased sensor data rate * replace RGB camera which was read by the onboard computer directly with a standalone HD camera (including SD card - just activated by the onboard computer) which saves computational resources * Launch tube