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DARPA KQ-X (Global Hawk)


Unmanned Aerial Refueling Tanker Demonstrator Vehicle


Two Northrop Grumman Global Hawk UAVs participated in NASA research regarding UAVs and inflight refuleing.
Authored By: Staff Writer | Edited: 4/4/2018
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Specifications


Year: 2012
Status: In-Development
Manufacturer(s): Northrop Grumman / NASA - USA
Production: 2
Capabilities: Aerial Refueling; X-Plane; Unmanned;
Crew: 0
Length: 44.42 ft (13.54 m)
Width: 116.17 ft (35.41 m)
Height: 15.16 ft (4.62 m)
Weight (Empty): 8,488 lb (3,850 kg)
Weight (MTOW): 22,928 lb (10,400 kg)
Power: 1 x Allison Rolls-Royce AE3007H turbofan engine developing 7,000 lb of thrust.
Speed: 497 mph (800 kph; 432 kts)
Ceiling: 65,617 feet (20,000 m; 12.43 miles)
Range: 15,534 miles (25,000 km; 13,499 nm)
Operators: United States
KQ-X is a program designation commissioned by DARPA (Defense Advanced Research Projects Agency) of the United States to modify a pair of existing NASA Northrop Grumman RQ-4 Global Hawk unmanned aerial vehicles for research into Autonomous Aerial Refueling practices and feasibility. A $33 million contract was awarded to Northrop Grumman for the program requirements which have involved installation of a hose-and-drogue assembly arrangement in which one Global Hawk would act as the aerial refueling tanker whilst the other Global Hawk would become the target aircraft to be refueled. The benefits of such a program are obvious, allowing for completely autonomous function of a UAV design without any required human interaction. It is estimated that the addition of in-flight refueling with Global Hawk UAVs could add as much as one week of uninterrupted flight for the product.

In August of 2012, it was announced that the pair of Global Hawks had completed a close-formation flight. The flights were undertaken back in May of 2012. Contrary to the normal arrangement of the hose-and-drogue fuel delivery system currently in use by fixed-wing aircraft (in which the receiving aircraft tailed the refueler), the KQ-X program is utilizing a receiver aircraft situated ahead and above the trailing tanker, the hose being lowered to the awaiting tanker. The tanker aircraft was identified by its long nose probe used in collecting sensitive mission data. The twin aircraft were put through all manner of close-ranged positions in the testing.

The second phase of testing has since been placed on hold as the Global Hawks were reverted back to NASA specifications for the upcoming hurricane season. Post-October, the Global Hawks will be reverted once again back to the KQ-X configuration for additional testing concerning Phase 2.






Armament



None. Only internal fuel stores.

Variants / Models



• KQ-X - Project Designation; 2 x Northrop Grumman Global Hawk UAVs are being utilized by NASA in the testing.
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