|
The Boeing Phantom Eye is a high altitude, long endurance (HALE) liquid hydrogen-powered〔http://www.airforce-technology.com/projects/phantomeyeunmannedae/〕 unmanned aerial vehicle developed by Boeing Phantom Works. The aircraft is Boeing's proposal to meet the demand from the US military for unmanned drones designed to provide advanced intelligence and reconnaissance work, driven by the combat conditions in Afghanistan in particular. ==Development== The Phantom Eye is an evolution from Boeing's earlier success with the piston-powered Boeing Condor that set several records for altitude and endurance in the late 1980s. Boeing has also been studying a larger HALE UAV that can fly for over 10 days and carry payloads of 2,000 pounds (900 kg) or more; the company is also working on the Phantom Ray UAV as a flying testbed for advanced technologies.〔 Phantom Eye's propulsion system successfully completed an 80-hour test in an altitude chamber on March 1, 2010; this cleared the way for the propulsion system and the airframe to be assembled.〔 Boeing has worked closely with Ball Aerospace, Aurora Flight Sciences, Ford Motor Co. and MAHLE Powertrain to develop the Phantom Eye.〔 The Phantom Eye was revealed to the press at a ceremony at Boeing's facilities in St Louis, Missouri, on July 12, 2010.〔 The Phantom Eye demonstrator is a 60%-70% scale design of an objective system. According to Darryl Davis, president of Boeing's Phantom Works advanced concepts group, the Phantom Eye demonstrator could lead to an objective system capable of achieving 24-hours-a-day, seven-days-a-week coverage of an area year round with as few as four aircraft. The demonstrator was shipped to NASA's Dryden Flight Research Center at Edwards Air Force Base, California, for ground tests. It conducted its first medium-speed taxi test there on March 10, 2012, reaching speeds of 30 knots. Boeing declared the test a success and said it paved the way for the aircraft's first flight, expected to last 8 hours. The Phantom Eye completed its first flight on June 1, 2012 at Edwards Air Force Base. It reached an altitude of 4,000 ft and a speed of 62 knots (115 km/h) for 28 minutes. Phantom Eye's landing gear dug into the dry lakebed and caused some damage to the aircraft.〔Rosenberg, Zach. ("Phantom Eye makes first flight" ). Flightglobal, June 4, 2012〕〔Norris, Guy. ("Phantom Eye Makes First Flight" ). Aviation Week, June 4, 2012.〕 On February 6, 2013, the Phantom Eye completed taxi testing at Edwards Air Force Base in preparation for the second flight. Sitting atop a launch cart, it reached speeds of 46 mph. In response to the first flight test, autonomous flight systems were upgraded and the landing system was improved.〔(Boeing Phantom Eye Completes Taxi Tests, Readies for Return to Flight ) - Boeing.mediaroom.com, February 7, 2013〕 The Phantom Eye completed its second flight on February 25, 2013 at Edwards Air Force Base. It climbed to an altitude of 8,000 ft at a cruising speed of for 66 minutes. The second flight test ended with a successful landing.〔(Boeing’s Phantom Eye Completes Second Flight ) - Ottawacitizen.com, February 27, 2013〕 On 6 June 2013, Boeing was issued a $6.8 million contract by the U.S. Missile Defense Agency to install an unidentified payload on the Phantom Eye demonstrator.〔(Phantom Eye to fly missile defence payload ) - Flightglobal.com, 6 June 2013〕 The payload was most likely a long-range sensing and tracking system required to aim a laser.〔(Return Of The ABL? Missile Defense Agency Works On Laser Drone ) - Breakingdefense.com, 17 August 2015〕 The Phantom Eye's fourth flight occurred on June 14, 2013, reaching an altitude of 20,000 ft for 4 hours. On September 14, 2013, its fifth flight reached an altitude of 28,000 ft for nearly four and a half hours. Although the flight test was deemed a success, sources claim that the test had originally been intended to reach a 40,000 ft altitude. The fifth flight incorporated a payload from the Missile Defense Agency.〔(High five for Phantom Eye ) - Shephardmedia.com, 20 September 2013〕 The sixth flight occurred on January 6, 2014 and lasted for 5 hours, longer than any previous flight.〔(Phantom Eye's next generation ) - Boeing press release, 6 January 2014〕 In February 2014, the Phantom Eye was promoted to experimental status by the Air Force's 412th Operations Group on recommendation from NASA’s Dryden Flight Research Center. The Phantom Eye had by then undergone six test flights and met NASA safety criteria. Classification as experimental under the USAF Test Center means it is no longer restricted to flying above Edwards AFB and will move to a test range several miles away to further endurance and altitude capabilities. In the coming months, Boeing will test the demonstrator to reach its desired operating altitude of and increase its endurance. If successful, a full-size operational Phantom Eye will be built to reach endurance goals of 7–10 days airborne.〔(Boeing's Phantom Eye takes huge step forward ) - Boeing press release, 12 February 2014〕 The demonstrator's ninth flight occurred in 2014 for 8–9 hours at 54,000 ft, then it was placed in storage at NASA’s Armstrong Flight Research Center. Boeing is looking for opportunities in the military or commercial sectors to continue development. Initially pitched as a high-flying satellite surrogate for ground surveillance or communications relay, the company is looking to see if a solid-state laser could be mounted to perform missile defense; a solid-state laser is desired over chemical lasers, like the one used in Boeing's previous YAL-1 Airborne Laser Testbed, because there is a shorter logistical tail and less time is needed to recharge and cool.〔(Phantom Works exploring laser-carrying stratospheric UAVs ) - Flightglobal.com, 18 May 2015〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Boeing Phantom Eye」の詳細全文を読む スポンサード リンク
|