![]() 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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