The Super-Fast Logistics of Delivering Blood By Drone

There's a better video of the drones here: [link] Google's delivery drones combine a multirotor design with fixed-wings. It seems like an eminently sensible design to me; fixed-wing operation will be quieter and more power-efficient, allowing longer travel distances (unlike the early Amazon Prime Air videos [1]), while hover capability avoids the need to parachute the load (unlike the current Zipline drones [2]) and provides a hover-and-land-almost-anywhere capability I imagine is useful. Presumably the winch-down-the-load design reduces the risk of a user putting their hands into the blades - not to mention reducing the risk from customers choosing an inappropriate landing location; I imagine the drone can also jettison the winch cord if it gets caught on anything. It precludes delivering directly to apartment windows - but AFAIK no-one else is trying that either. It's a pity they haven't released clear info on these drones' range, round-trip time and weight carrying capacity. Which are of course critical to working out the profitability of a citywide coffee delivery service. [1] [link] [2] [this video]