Aerial Warfare

Sikorsky Flight-Tests Scalable Rotor Blown Wing Uncrewed Aerial System for US DARPA Project

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Sikorsky Flight-Tests Scalable Rotor Blown Wing Uncrewed Aerial System for US DARPA Project

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Sikorsky Flight-Tests Scalable Rotor Blown Wing Uncrewed Aerial System for US DARPA Project
Sikorsky Flight-Tests Scalable Rotor Blown Wing Uncrewed Aerial System for US DARPA Project

Sikorsky, a Lockheed Martin company (NYSE: LMT), is conducting flight tests to mature the control laws and aerodynamics of a novel vertical takeoff and landing uncrewed aerial system (VTOL / UAS). The flight tests are intended to prove the efficiency and scalability of a twin proprotor ‘rotor blown wing’ configuration that sits on its tail to take-off and land like a helicopter, and transitions easily to horizontal forward flight for long-endurance missions, such as intelligence, surveillance, reconnaissance and targeting. The ongoing flight tests support the ANCILLARY initiative by the Defense Advanced Research Projects Agency (DARPA), which seeks to develop a Class 3 UAS VTOL X-Plane that can operate in most weather conditions from ship decks and unprepared surfaces without infrastructure.

“Flight tests are underway to verify our tail-sitting rotor blown wing UAS can launch and land vertically with high stability, and cruise efficiently on wing. Key enablers to flight maneuverability, and future vehicle scalability, are our MATRIX autonomy flight control system, and an articulated rotor system similar to those in traditional helicopters,” said gor Cherepinsky, director of rapid prototyping group Sikorsky Innovations.

Graphical rendering of a Sikorsky rotor blown wing VTOL UAS ready for launch from a ship’s deck. The tail sitting aircraft flies autonomously via Sikorsky’s MATRIX autonomy system.
Graphical rendering of a Sikorsky rotor blown wing VTOL UAS ready for launch from a ship’s deck. The tail sitting aircraft flies autonomously via Sikorsky’s MATRIX autonomy system. (Photo by Lockheed Martin Corporation)

The term ‘rotor blown wing’ refers to the constant airflow from the proprotor wash across the wing. Sikorsky chose the design to reduce drag on the wing in hover mode and when transitioning to forward flight, and to increase cruise efficiencies and endurance. The design is just one of the many ways Sikorsky is advancing 21st Century Security® technologies and innovations. For the flight tests now underway, Sikorsky is flying a proof-of-concept vehicle powered by a battery. If selected to produce an air vehicle for a future ANCILLARY phase, Sikorsky plans to build a 300-pound hybrid-electric version to include a 60-pound ISR payload.

Sikorsky is one of several competitors down-selected to advance their UAS conceptual designs into the next development phase. Sikorsky Aircraft is an American aircraft manufacturer based in Stratford, Connecticut. It was established by aviation pioneer Igor Sikorsky in 1923, and was among the first companies to manufacture helicopters for civilian and military use. It also produced seaplanes for passenger transport and surface vehicles such as trains and boats. The company was owned by United Technologies Corporation until November 2015, when it was sold to Lockheed Martin. Sikorsky Innovations was formed in 2010 to overcome technological challenges to rotary wing speed, autonomy, and intelligence.

Sikorsky Flight-Tests Scalable Rotor Blown Wing Uncrewed Aerial System for US DARPA Project
Sikorsky is flight testing a rotor blown wing tail sitter VTOL UAS. Prop rotors, electrification, and autonomy are key enabling technologies for efficient vertical and horizontal flight. (Photo by Lockheed Martin Corporation)

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