December 4, 2012: The U.S. Navy X-47B UCAV (unmanned combat air vehicle) made its first catapult launch on November 29th, 22 months after its first flight. This launch was not from a carrier but an airfield built to the same size as a carrier deck and equipped with a catapult. This first launch was to confirm that the X-47B could handle the stress of a catapult launch. Another X-47B has been loaded onto the deck of a carrier, to check out the ability of the UCAV to move around the deck. If all goes well, the first carrier launch of an X-47B will take place next year, along with carrier landings. Last year the navy tested its UCAV landing software, using a manned F-18 for the test, landing it on a carrier completely under software control.
It was four years ago that the navy rolled out the first X-47B, its first combat UAV. This compact aircraft has a wingspan of 20 meters (62 feet and the outer 25 percent folds up to save space on the carrier). It carries a two ton payload and will be able to stay in the air for twelve hours. The U.S. is far ahead of other nations in UCAV development, and this is energizing activity in Russia, Europe, and China to develop similar aircraft. It’s generally recognized that robotic combat aircraft are the future, even though many of the aviation commanders (all of them pilots) wish it were otherwise. Whoever gets there first (a UCAV that really works) will force everyone else to catch up or end up the loser in their next war with someone equipped with UCAVs.
The U.S. Navy has done the math and realized that they need UCAS on their carriers as soon as possible. The current plan is to get these aircraft into service six years from now. But there is an effort to get the unmanned carrier aircraft into service sooner than that. The math problem that triggered all this is the realization that American carriers had to get within 800 kilometers of their target before launching bomber aircraft. Potential enemies increasingly have aircraft and missiles with range greater than 800 kilometers. The navy already has a solution in development since the X-47B UCAS has a range of 2,500 kilometers
Last year the U.S. Navy leadership also ordered naval aviation commanders to examine the possibility of reducing orders for the new F-35B and F-35C manned aircraft and use that money to buy the new X-47B and similar robotic combat aircraft. The navy currently plans to buy 680 F-35B and F-35C aircraft for (on average) $100 million each. A UCAV costs less than half that and provides most of the same capabilities, plus much longer range and no risk of losing pilots.
For most of the last decade, the navy has been hustling to ready a UCAV for carrier operations and combat use. Within four years the navy expects to have the X-47B demonstrating the ability to regularly operate from a carrier and perform combat (including reconnaissance and surveillance) operations. The new efforts aim to have UCAVS aircraft perform ground attack missions as well, something the Predators have been doing for over a decade. The larger Reaper UAV was designed to expand this combat capability and is being built as quickly as possible, to replace F-16s and other bombers in the combat zone.
The 20 ton X-47B weighs a little less than the 24 ton F-18A and has two internal bays holding two tons of smart bombs. Once it can operate off a carrier, the X-47B will be used for a lot of bombing, sort of a super-Reaper. The navy has been impressed with the success of the Predator and Reaper. But the Reaper weighs only 4.7 tons. The much larger X-47B uses a F100-PW-220 engine, which is currently used in the F-16 and F-15.
The air force and navy have always differed about the widespread use of UAVs in combat. When the air force agreed to work with the navy on UCAVs a decade ago the idea was that the air force ones would largely remain in storage, to provide a rapid "surge" capability in wartime. The navy, however, wanted to use theirs to replace manned aircraft on carriers. The reason was simple, carrier ops are dangerous, and carrier qualified pilots are more difficult and expensive to train and retain in the service. The navy still has these problems and senior admirals are pretty much in agreement that UCAVs are the future of carrier aviation. The sooner these UCAVs prove they can safely and effectively operate from carriers, the better. The X-47B (or planned, slightly larger, X-47C) is not the definitive carrier UCAS but the navy hopes it is good enough to show that unmanned aircraft can do the job. Normally, "X" class aircraft are just used as technology demonstrators. But the X-47 program has been going on for so long, and has incorporated so much from UAVs already serving in combat, that the X-47B may end up eventually running recon and bombing missions as the MQ-47B.
The Department of Defense leadership is backing the navy efforts and spurring the air force to catch up. At the moment, the air force has a hard time building enough MQ-9s, which are used as a ground support aircraft, in addition to reconnaissance and surveillance. But, as the navy is demonstrating, you can build UCAS that can carry more weapons, stay in the air longer, and hustle to where they are needed faster.