The MQ-25 Stingray is an autonomous, carrier-based, aerial refueling drone being developed by Boeing for the United States Navy. It's equipped with two Cobham Aerial Refueling Stores (ARS) which are mounted on external hardpoints underneath its wings. It's powered by a single Rolls-Royce AE 3007N turbofan engine and can travel about 500 nmi while transporting approximately 16,000 lb of fuel. The only method it uses in order to refuel other aircraft is the probe-and-drogue refueling method.