The build is based on an 11-inch party balloon that can provide about 11 grams of lift. This doesn’t allow for much leeway in terms of weight, so [masymachien] used hacked-up servos for the motors.

Gabriel Garde, head of NASA’s Balloon Program, leads the return to Wānaka, New Zealand, to flight-qualify giant super pressure balloons for 100-day missions in near-space. The 18.8-million ...