As with most 16-year-olds, ’s resources are limited, so feel free to drop him some financial help on the R2Home GoFundMe page. The project is open source, and the mechanical design files and control code is up on GitHub. So far has done a series of test drops from a drone at low altitude to test deployment and steering, using an RC controller. While this system might not be possible to return to the launch point, it could certainly close the gap, and land safely in a designated area. A possible alternative is Ardupilot, which we’ve seen used on several autonomous drones, gliders, and rovers. is working on a custom flight controller, built around a Teensy 4.1, GPS receiver, and digital compass. The entire system is designed to fit in a 7×40 cm tube, and the parachute is deployed with the help of a small drogue chute and a servo-operated release mechanism. A control stroke of about 20 cm was required, and found that RC sailboat winch servos work perfectly for this application. Steering a parachute involves pulling on a pair of brake lines, one for each side of the parachute. He quickly learned that a canopy aspect ratio of below two was needed for reliable deployment, so he started sewing his own canopies. ’s first challenge was to create a steerable parachute that can deploy reliably, so he started doing tests with a borrowed scale model paragliding wing. A Teensy runs the show, and controls a pair of sail winch servos pulling the brake lines experienced this first-hand during a balloon launch conducted by his high school, which inspired him to R2Home, a GPS-guided parachute recovery system. Most amateur high altitude balloon payloads descend back to earth with a simple non-steerable parachute and can land hundreds of kilometers from the launch site in inaccessible areas.
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