Project Black Sky

A place for video of your launches
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Project Black Sky

Postby john77 » Tue Nov 06, 2012 10:11 pm

For my son’s 7th grade science fair project, we decided to make a high altitude balloon so he could study the effects of low pressure on common objects. The project was a lot of fun, and this forum was really helpful.

At its maximum height the balloon capsule reached 85,011 feet. The ascent took 2 hours and 12 minutes, and the descent took 38 minutes. The balloon reached a maximum speed of 65 mph, and a low internal capsule temperature of 15.62 Fahrenheit (because we forgot to put hand-warmers in the capsule before launch). The total distance traveled was 87.36 miles.

The entire journey was captured in HD video on GoPro Hero camera. The video provides a cool view of the entire southern portion of Lake Michigan as well as Chicago and several states in the midwest US. Digital still photos were also taken all the way up to 55,000 feet by a Canon PowerShot (where the camera unexpectedly died). The capsule also included a tiny, low-cost $35 Linux computer called Raspberry Pi. The Raspberry Pi had an attached GPS and pressure sensor which allowed custom software we wrote to record the balloon's coordinates, speed, altitude, heading, and pressure data throughout the mission on an SD card.

All the videos and pictures are on the website:
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