Northrop Grumman is studying a turbofan re-engined derivative of the C-2 Greyhound as a potential low cost candidate for the US Navy's Common Support Aircraft requirement to replace carrier-based C-2 onboard delivery, E-2 early warning and S-3 maritime patrol, electronic surveillance and tanker aircraft. The Greyhound 21 could be operational by 2005. The aircraft would carry a 4,500kg payload.

Source: Flight International