World's First Stealth Drone Fighter Jet in Action

FIRST DRONE FIGHTER JET IN THE WORLD - Northrop Grumman's X-47B Unmanned Aerial Vehicle The X-47B is an unmanned combat air system carrier (UCAS) is being developed by Northrop Grumman for the US Navy (USN). The strike fighter size unmanned aircraft is currently in its demonstration phase. The unmanned aircraft was first developed as part of the X-47 program. Air worthiness of the X-47B unmanned combat air system demonstrator was developed at an estimated cost of $813m.

The aircraft performed a successful initial test flight at Patuxent River, Maryland, US, in July 2012. The X-47B is expected to enter active naval service by 2019. Development history of the UCAS-D "The X-47B UCAS was developed by the US Navy as part of the unmanned combat air system carrier demonstration (UCAS-D) program." The X-47B UCAS was developed by the US Navy as part of the unmanned combat air system carrier demonstration (UCAS-D) program.

The program aims to develop and demonstrate which fighter sized tailless unmanned aircraft can be deployed from US Navy aircraft carriers. The X-47B is a variant of Pegasus X-47A, which was developed as a joint USAF and USN program, called J-UCAS, in 2001. The program was funded by the DARPA with Northrop Grumman as the main contractor. In February 2006, however, the UCAS development program was cancelled for separate UAV development programs by both the defense forces.

Development of the X-47B, which had started in June 2005, was temporarily halted following the cancellation. The US Naval Air Systems Command (NAVAIR) contracted Northrop Grumman for the construction and demonstration of two X-47B aircraft under the unmanned combat air system demonstrator (UCAS-D) program, in August 2007. The UCAS-D program also aims to pave the way for developing potential future carrier-compatible, unmanned systems with little risk. Companies collaborating on the UCAS-D programme include Rockwell Collins, Goodrich, Lockheed Martin, Parker Aerospace, Honeywell, GKN Aerospace, General Electric (GE), Wind River, Dell, Hamilton Sundstrand, Pratt & Whitney, Eaton and Moog. Design and features of the X-47B The tailless unmanned aircraft is 38.2ft-long and has a wingspan of 62.1ft.

The shape of the aircraft is designed for stealth or low observable relevant requirements. The weapons bay can carry 4,500lb of weapons. Operations of the computer-controlled X-47B UCAS are smart and its flight control system is autonomous. The navigation of the UCAS is controlled by hybrid global positioning system (GPS) vision-based system. The flight path is preprogrammed and its operations are monitored by a mission operator. The UCAS is equipped with electro-optics (EO), infrared (IR), synthetic aperture radar (SAR), inverse SAR, ground moving target indicator (GMTI), electronic support measures (ESM) and maritime moving target indicator (MMTI) sensors. The UCAS-D will feature both probe-and-drogue of the US Navy and boom-receptacle mechanisms of the USAF for autonomous air refueling. X-47B engine and performance details The X-47B is powered by a Pratt & Whitney F100-PW-220U engine and exhaust system. The aircraft has a high subsonic speed of approximately 0.45M and range of roughly 2,100nm. The UCAS can fly to a maximum altitude of 40,000ft. Testing of the X-47B demonstration aircraft "The X-47B is powered by a Pratt & Whitney F100-PW-220U engine and exhaust system." Two autonomous jet-powered X-47B aircraft were built under the UCAS-D programme.

The two demonstration vehicles have similar design and hardware features. However, only one is equipped to test aerial refueling tasks. They can accommodate various kinds of sensors for reconnaissance, intelligence and surveillance and have space for weapon systems. Payload is not installed on the demonstration units. The first X-47B, including structural proof testing, was completed by October 2009. Named air vehicle 1 (AV-1), the aircraft was transferred to Edwards Air Force Base (AFB) for flight testing in July 2010. The second aircraft, named AV-2, arrived at the base for testing in March 2011. The first flight test of the UCAS-D was conducted in February 2011. The first catapult launch of X-47B was conducted at an onshore catapult facility at Naval Air Station Patuxent River in November 2012. The first at-sea test phase involving a series of deck handling trials aboard the USS Harry S. Truman (CVN 75) was completed in December 2012. The aircraft will also be tested for launching, operating and recovering capabilities in a navy carrier operable area of 50nm. The carrier launch, recovery, and deck handling tests were completed in December 2012. The aerial refueling demonstrations were carried out in April.

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