Lockeed Martin's "Skunk Works," the office in charge of developing the company's high-end future
The RQ-4 and the U-2 already perform similar operational roles. But the Global Hawk is more difficult to detect than a U-2 and is unmanned.
Ideally, Skunk Works would combine the best features of the Global Hawk with the U-2 to create an optionally-manned high-altitude surveillance aircraft with the latest sensors.
The U-2 is a high-altitude manned surveillance plane. With a service ceiling of up to nearly 85,000 feet, the plane is capable of flying for 8 hours at a time at speeds of 500 miles per hour.
The RQ-4 is also a high-altitude surveillance craft, although it is unmanned and flown by a team of remote operators. It was originally designed to complement manned surveillance craft such as the U-2, although US military planners have long intended to replace the U-2 with the Global Hawk.
US Air Force via Reuters
"Think of a low-observable U-2," Lockheed's U-2 strategic development manager, Scott Winstead, told Flightglobal. "It's pretty much where the U-2 is today, but add a low-observable body and more endurance."
By being optionally manned, Lockheed hopes that the U-2 successor could offer a wider mission range than either a solely manned or unmanned aircraft, Winstead told Flightglobal.
Wiki/The Aviationist
Because of the plane's ability to operate at extremely high altitudes, the Air Force maintains that the U-2 is one of the most effective reconnaissance platforms ever built. The U-2 is generally cheaper to operate than surveillance drones, and it has become a staple aircraft in the monitoring of the Korean Demilitarized Zone.