I have developed a parachute rescue and recovery system. A year ago, I decided to put a FLIR thermal imaging camera on a quad for work doing energy audits. They are expensive, and I became obsessed with developing a parachute rescue system (as obsessed as I am about flying). I hired someone to write the software, I figured out how to shut down the motors electronically and automatically, and eject a parachute. In the past week, I have dropped a quad with this system over 100 times. The only time the cords got tangled in the motors, was when I did a flip. because the motors had already shut down, it still came down rather gracefully, and sustained no damage. During a period of rather strong winds, combined with an unexpected fly- away, the cords also got tangled slightly, and again, sustained no damage, and landed fine. I have videos of both times.
I have become an expert in crashing multirotors, having performed just about every conceivable method of causing a crash. The system works so that as the quad tips, the parachute puts the quad back upright. If it decides to fall perfectly horizontal, it also functions. I want to get this on the market before Christmas, likely next week. I do need to finalize the price, as it ended up being more expensive than I expected, with all the electronics and parts. It is for multirotors with cameras, it NOT for sport flying. By the time I am completely done, tomorrow, I will weight it. Its about the same weight as a small sized extra battery, I believe. The web site should be done in a couple days, any questions, fire away.