Airmen work on an RQ-4 Global Hawk after it returned to Beale Air Force Base, Calif. The US Air Force has decided not to pursue an adapter that would improve the Block 30's sensor suite. (US Air Force)

Nov. 20, 2013 - By BRIAN EVERSTINE – Defense news

The US Air Force will not buy a “universal payload adapter” to attach sensors from the U-2 to a variant of the unmanned RQ-4 Global Hawk, another sign that the service is not interested in keeping the brand-new planes in the sky.

The Block 30 variant of the Global Hawk, a massive unmanned aircraft designed for intelligence, surveillance and reconnaissance, has been repeatedly targeted for cuts by the Air Force. The service planned to move the aircraft straight from the production line to the boneyard in 2013, but that move was blocked by Congress.

The Block 30’s sensor suite is not as capable as the U-2, and Global Hawk builder Northrop Grumman has been designing an adapter to attach the superior system to the unmanned aircraft. The Air Force, however, does not intend to use the adapter, said Maj. Ryan Simms, the chief of intelligence, surveillance and reconnaissance and remotely pilot aircraft policy in the headquarters Air Force executive action group.

Northrop Grumman officials said earlier this year that they are working through internal research and development on the adapter. Tom Vice, head of Northrop’s Aerospace Systems sector, told reporters in August that it was a “mature technology.”

The Air Force called the adapter “feasible,” and said it would cost about $487 million. It would take three years to develop and test, followed by another two years of production, according to an April report sent to congressional defense committees.

The adapter would attach the Optical Bar Camera or Senior Year Electro-Optical Reconnaissance System-2b sensors, in addition to Airborne Signals Intelligence Payload.

Simms told Air Force Times on Tuesday that budget restrictions will prevent the service from moving forward with the adapter.

Despite their uncertain future, Block 30s are currently flying humanitarian aid and military missions, Simms said. One Global Hawk in the Philippines has flown 50 hours and taken 300 pictures, he said.

FALLS CHURCH, Va. -- Jan. 26, 2012 – Northrop Grumman Corporation

Northrop Grumman Corporation has released the following statement on the Global Hawk Block 30 program:

    "The Pentagon announced today that it is planning to cancel the Global Hawk Block 30 program and plans to perform this mission with the U-2 aircraft. Northrop Grumman is disappointed with the Pentagon's decision, and plans to work with the Pentagon to assess alternatives to program termination.

    "The Global Hawk program has demonstrated its utility in U.S. military operations in Iraq, Afghanistan and Libya, as well as its utility in humanitarian operations in Japan and Haiti. Just a few months ago, the Pentagon published an acquisition decision memorandum regarding Global Hawk Block 30 that stated: 'The continuation of the program is essential to the national security… there are no alternatives to the program which will provide acceptable capability to meet the joint military requirement at less cost.'

    "Global Hawk is the modern solution to providing surveillance. It provides long duration persistent surveillance, and collects information using multiple sensors on the platform. In contrast, the aging U-2 program, first introduced in the 1950s, places pilots in danger, has limited flight duration, and provides limited sensor capacity. Extending the U-2's service life also represents additional investment requirements for that program.

    "Northrop Grumman is committed to working with our customers to provide the best solutions for our country and our allies. We are pleased with the continuing support for the Global Hawk Block 40 system, as well as for the Navy's Broad Area Maritime Surveillance system and our other unmanned systems."