The R-11 Refueler replaced the R-9 Refueler as the primary mobile refueling vehicle for The United States Air Force. There are currently three models of the R-11. The first generation was delivered in 1989 to the Air Force by the Oshkosh Truck Corporation and is designated the Oshkosh R-11. The Air Force purchased 1,250 Oshkosh R-11s between 1989 and 1991. Deliveries of the 2nd generation R-11 began in 1994. The contract for the 2nd generation model was awarded to the Kovatch Corporation, and the pumping and dispensing systems are mounted on a Volvo

Volvo

AB Volvo is a Swedish builder of commercial vehicles, including trucks, buses and construction equipment. Volvo also supplies marine and industrial drive systems, aerospace components and financial services...

chassis. These models are commonly referred to as the Kovatch-Volvo R-11. Deliveries of the 3rd generation R-11 began in 2004. The contract for this model was also awarded to the Kovatch Corporation, and the pumping and dispensing systems are mounted on an International chassis. This model is commonly referred to as the Kovatch-International R-11]. The Air Force also purchases remanufactured R-11 refuelers. ATAP, Inc. of Eastaboga, AL currently has this contract and has developed a reputation for building the vehicles to "like new" status.

R-11 fuel tanks hold a maximum capacity of 6000 gallons (22,712.5 l) and are able to issue fuel at a rate of 600 gallons (2,271.2 l) per minute.