Michael Pick, creator of SmartChutes, notes in his campaign video that the first time he flew a quadcopter, he felt uneasy about sending so much expensive equipment into the air. So he came up with an emergency system for drones: a 36-inch parachute in a 4.25-inch long by 1.5-inch diameter canister and a sensor that weigh 4 ounces combined. The system can attach to quadcopters that are up to four pounds. The sensor takes 15 seconds to prime, and operates off its own battery. An accelerometer and a gyroscope can detect flips, freefalls, or a tilt over 90 degrees. When these potentially disastrous maneuvers are detected, the sensor signals the canister to release the parachute.