Grumman C-2 Greyhound

C-2 Greyhound
A C-2A in July 1988, based at Naval Air Station Sigonella in Sicily, Italy
Role	Carrier-capable transport / Carrier onboard delivery
National origin	United States
Manufacturer	Grumman Northrop Grumman
First flight	18 November 1964
Introduction	1966
Status	C-2A: Retired C-2A(R): In service
Primary user	United States Navy
Produced	C-2A: 1965-1968 C-2A(R): 1985-1989
Number built	C-2A: 17 C-2A(R): 39
Unit cost	US$40.01 million in 2016
Developed from	Northrop Grumman E-2 Hawkeye

The Grumman C-2 Greyhound is a twin-engine, high-wing cargo aircraft, designed to carry supplies, mail, and passengers to and from aircraft carriers of the United States Navy. Its primary mission is carrier onboard delivery (COD). The aircraft provides critical logistics support to carrier strike groups. The aircraft is mainly used to transport high-priority cargo, mail and passengers between carriers and shore bases, and can also deliver cargo like jet engines and special stores.

Prototype C-2s first flew in 1964 and production followed the next year. The initial Greyhound aircraft were overhauled in 1973. In 1984, more C-2As were ordered under the name Reprocured C-2A or C-2A(R). The C-2As received updated propellers (from four to eight blades) and navigation.

The C-2 Greyhound, a derivative of the E-2 Hawkeye, shares wings and power plants with the E-2, but has a widened fuselage with a rear loading ramp. The first of two prototypes flew in 1964. After successful testing, Grumman began production of the aircraft in 1965. The C-2 replaced the piston-engined Grumman C-1 Trader in the COD role. The original C-2A aircraft were overhauled to extend their operational life in 1973.

Powered by two Allison T56 turboprop engines, the C-2A can deliver up to 10,000 pounds (4,500 kg) of cargo, passengers or both. It can also carry litter patients in medical evacuation missions. A cage system or transport stand restrains cargo during carrier launch and landing. The large aft cargo ramp and door and a powered winch allow straight-in rear cargo loading and unloading for fast turnaround. The Greyhound's ability to airdrop supplies and personnel, fold its wings, and generate power for engine starting and other uses provide an operational versatility found in no other cargo aircraft.

The C-2 has four vertical stabilizers, of which three are fitted with rudders. A single vertical stabilizer large enough for adequate directional control would have made the aircraft too tall to fit on an aircraft carrier hangar deck. The four-stabilizer configuration has the advantage of placing the outboard rudder surfaces directly in line with the propeller wash, providing effective yaw control down to low airspeeds, such as during takeoff and landing. The inner-left stabilizer lacks a rudder, with it sometimes have been referred to as the "executive tail", as it has nothing to do compared to the other three. A single C-2 (2797) was equipped with an air-to-air refueling probe but this was not installed in other aircraft.