As was hinted at then, the Seattle-based company has now officially announced that it's working on a passenger-carrying variant known as the Model J.
First of all, just how does the original Plimp drone work?
Well, it's basically a VTOL (vertical take-off and landing) blimp with two wings, each wing in turn equipped with an electric motor/propeller. When it's taking off, landing or hovering in one place, the wings rotate so that the props are facing straight up – this lets it move vertically. Once it's ready to head for its destination, though, the wings rotate so that the props face forward, allowing for fast and efficient fixed-wing flight.