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====== 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}}

<font inherit/inherit;;inherit;;#ffffff>The changed to the v2.0 model included</font>

  * 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