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The Boeing MQ-28 Ghost Bat, previously known as the Boeing Airpower Teaming System (ATS), is a Loyal Wingman class stealth, multirole, unmanned combat aerial vehicle in development by Boeing Australia for the Royal Australian Air Force (RAAF). It is designed as a force multiplier aircraft capable of flying alongside crewed aircraft for support as part of an integrated system including space-based capabilities, and performing autonomous missions independently using artificial intelligence. The Ghost Bat is an uncrewed aerial vehicle incorporating artificial intelligence and utilising a modular mission package system in the nose of the aircraft. The entire nose section can be removed and quickly swapped for another with a different payload for various missions including combat, force reconnaissance and electronic warfare. Developed under Air Force Minor Program DEF 6014, one role will be to utilise the Manned-Unmanned Teaming (MUM-T) concept to support and protect manned Royal Australian Air Force (RAAF) aircraft, such as the F-35A, F/A-18F, E-7A, and KC-30A while they conduct operations. The UAV is designed to act as a "loyal wingman" that is controlled by a parent aircraft to accomplish tasks such as scouting or absorbing enemy fire if attacked, as well as operating independently. It has a 2000-mile ferry range or 900-mile combat radius. The UAV also has a jet engine which allows it to fly in the high subsonic flight regime and keep up with manned fighters. Boeing has said it has 'fighter-like' maneuverability. The MQ-28A prototype did not use any radiation-absorbent material (RAM) coating and instead relied on its shape to reduce its radar cross section (RCS). The aircraft wing is Boeing's largest resin-infused single composite component, leveraging proven technology from Boeing 787 wing's trailing edge. Three key manufacuring innovations were incorporated in the areas of robotic drill and fill, shimless assembly, and full-size determinant assembly. The aircraft is the first combat aircraft designed and developed in Australia in over half a century. In February 2019, Boeing said that it will "depend on the market" whether the aircraft is manufactured in Queensland or the US. Ghost Bat will remain a sovereign Australian program, with aircraft only being produced in Australia and the lead partner on the program being the RAAF. On 21 September 2021, Boeing Australia unveiled the launch of a new manufacturing facility for its Loyal Wingman uncrewed aircraft at Wellcamp Airport in Toowoomba, Queensland. On 4 November 2021, Boeing Australia announced the Melbourne facility had already commenced construction of its fifth aircraft whilst the new Towoomba facility is under construction. On 26 March 2024, Boeing Australia announced the start of construction on a 9000 square-meter facility to support construction of the Ghost Bat. The RAAF initially planned to buy three Airpower Teaming System (ATS) systems, as part of the Loyal Wingman Advanced Development Program (LWADP). The three drones were built at an automated production line in Melbourne, Victoria, a proof of concept for full-scale production. The order was increased to six with an A$115 million contract days after the first flight. As of 9 May 2023, the Australian government confirmed its commitment to funding 10 aircraft for the RAAF, not including three prototypes that will not be owned by the government or operated by the RAAF, taking the government’s total investment in the Loyal Wingman program to over A$600 million. The uncrewed platforms are scheduled to enter service with the RAAF in 2024-25. For testing and possible uses, click here.

The Franklin Sport is a two seat sport and training biplane built in the U.S. in 1930. Several different engines, in the power range 55–90 hp (41–67 kW), were fitted. Two remained airworthy in 2011. The Sport is a single bay, unequal span biplane. Its wings are built around twin spruce spars and, like the rest of the aircraft, fabric covered. Upper and lower wings have the same chord and outward-leaning, N-form interplane struts between their spars provide a wide interplane gap of about 50 in (1,300 mm). The upper wing is without dihedral but the lower, equipped with Frise ailerons, is set at 2°. Both wings are rectangular in plan out to rounded tips though the upper wing, held centrally over the fuselage on a cabane, has a semi-circular cut-out to increase the pilot's upwards field of view. All the Sport variants were powered by one of three types of five cylinder radial engine, nose-mounted on a frame which allowed easy exchanges between types. The fuselage has a flat-sided steel tube Warren girder structure with two open cockpits, one between the wings and the other just aft of the upper trailing edge with an extended, faired headrest. It is normally piloted from the rear seat, though the forward cockpit also has flight controls. Some instruments like the fuel gauge are visible from either seat. At the rear the tail also has a steel tube structure. The tailplane and elevators are mounted on top of the fuselage and the fin and unbalanced rudder have a rounded profile. The landing gear is fixed and of the split axle type, with mainwheels on V-struts from the central fuselage underside and with vertical oleo struts from the outer axle to the wing leading edges, where single bracing struts connect to the upper fuselage longerons. A short tailskid is mounted on the extreme rear fuselage. The Sport prototype, powered by a 55 hp (41 kW) Velie M-5 engine, first flew on 27 January 1930. After tests this was abandoned and production aircraft had either a 65 hp (48 kW) M-5 (Sport A, 8 built) or a 90 hp (67 kW) Lambert R-266 (Sport 90, 6 built) engine. The histories of most of these club aircraft is uncertain. Further production ended in 1933 when Franklin Aircraft ceased trading. Two, both Sport 90s, remained airworthy in U.S. museums in 2011, though only one was on public display. Variants Sport 55 1930, Prototype, 55 hp (41 kW) Velie M-5. One only. Sport 65 (Sport A) 1930, 65 hp (48 kW) M-5. Eight built. Sport 70 (Sport B) 1930, 70 hp (52 kW) Le Blond 5DE. Built but not flown. Sport 90 1931 90 hp (67 kW) Lambert R-266. Six built.

The Yakovlev Yak-141 (Russian: Яковлев Як-141; NATO reporting name "Freestyle"), also known as the Yak-41, is a Soviet supersonic vertical takeoff/landing (VTOL) fighter aircraft designed by Yakovlev. Intended as a replacement for the Yak-38, it was designed as a supersonic fleet defence fighter capable of STOVL/VTOL operating from Soviet carriers. Four prototypes were built before the project's cancellation. Yakovlev always believed the Yak-38 to be an interim aircraft, developed to gain experience designing and developing military VTOL aircraft. Even before the Yak-38's introduction, the Soviet Navy desired a more comprehensive aircraft, with greater capabilities than the Yak-38 offered. The result was a design contract offered to Yakovlev in 1975. The requirement was for an aircraft with only one mission: air defense of the fleet. Unlike the Yak-38, this aircraft was to have sustained supersonic speed. Maneuverability, radar and weapons loads were expected to be similar to those of current front-line fighters, such as the Su-27 and MiG-29. For the Soviet Navy this aircraft was to be their next generation VTOL fighter. For Yakovlev the aircraft was viewed as a way of returning to designing Soviet fighter aircraft. Because of the importance and complexity of the project, Alexander Sergeyevich Yakovlev assigned a large portion of his OKB to the development of the new VTOL fighter, with no fewer than ten chief engineers working simultaneously on what was called "Product 48" (the military had designated it Yak-41). Over fifty designs were studied. One key problem was designing an aircraft with both vectoring thrust and an afterburner, which was essential for sustained supersonic speeds. A twin-engine design was considered, but abandoned as the loss of an engine on landing would result in an immediate roll to the side. Eventually it was decided that the best arrangement was a single vectoring nozzle located just behind the center of gravity, as well as dedicated vertical thrust jets positioned just behind the cockpit. A considerable amount of time was spent in the development of a flat, rectangular nozzle similar to that later employed on the American F-22 Raptor. Such a nozzle proved well-suited for the changes in configuration needed for both thrust vectoring and supersonic flight, and allowed for a thin, shallow tail. Ultimately, a circular nozzle was used, located between twin booms supporting the twin-finned tail. Yak-41 or Yak-141 The design was initially designated the Yak-41M by the Soviet military. Once testing commenced, and the two prototypes began accumulating numerous world class records, it became necessary to invent a designation for use in the west, as the name Yak-41M was classified. The designation Yak-141 was selected, and it was by this name that the aircraft became known to western allies, though officially the aircraft's designation remained Yak-41M within the Soviet military. In 1991 Lockheed-Martin entered into partnership with Yakovlev to further develop an aircraft they had always known as the Yak-141. Largely as a result of this agreement, by 1992 Yakovlev changed the aircraft's designation to Yak-141 for the two flyable prototypes. Series production in Russia could further change the designation. Four were built. For more details of design and development, operational history and variants, click here.

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