Originally Posted by
Zaxis
If the pilot over Headingly is who I think it is, his aircraft has dual GPS and IMU units plus a safety parachute and possibly dual electronic motor controls. Which is about the most redundancy available on commercial drones. The drone's control system will handle the loss of one engine as it's a 2x4 configuration. The batteries will be 2 packs in parallel to cover the case of one pack failing, one thing the 3DR did not have. Seriously consider one of the DJI line of drones, a bit more expensive but they do cover some of your redundancy worries.
Most recent commercial drones come equipped with some of the same redundancies but none have got triplex redundant systems yet but I suspect it will come soon.
Thanks - I am off to have a good look at one.