||This is my third high altitude balloon build.
Key features of WB3 included:
103,000 ft. apogee / burst altitude
New DragonTouch action cam for primary camera.
"Love Letter to Earth" theme.
3D printed, hand-painted Earth model.
Sensor Readings: Humidity, Temperature, Pressure, Altitude, CO2
Heating chamber for CO2 experiment
LoRa electronic cut-down system to separate payload from cord when stuck in a tree.
LoRa activated buzzer for helping to locate during recovery.
PiCamera facing upwards to capture footage of the balloon and parachute
Yeast science experiment (successfully activated yeast after exposure to high altitude environment)
Chia seeds experiment (ongoing)
Scented putty experiment (lost some scent after high altitude exposure)
Bubble wrap experiment (large bubbles popped, small bubbles stayed intact)
Rubber band experiment (seemed undamaged/unaffected by cold/low-pressure)
Improved flight prediction, fill procedure, and balloon led to accurate landing 5 min from home.