SW-4. PZL-Świdnik's parent company, AgustaWestland chose to use the SW-4 as the basis for an optionally manned rotorcraft, the PZL-Świdnik SW-4 Solo. In 2011, development of an optionally-manned demonstrator began. The SW-4 Solo was first was shown at the MSPO 2012 in Poland as "SW-4 Solo" RUAS/OPH platform (Rotorcraft Unmanned Air System/Optionally Piloted Helicopter). In 2013, AgustaWestland was given a Royal Navy contract for the SW-4 Solo's development as part of the UK's RWUAS (Rotary Wing Unmanned Air System) Capability Concept Demonstrator (CCD) programme. Development of the SW-4 Solo is also being supported by the Italian Ministry of Defence's Directorate for Air Armaments under the Italian National Military Research Plan. By September 2015, the SW-4 Solo had performed a total of 26 demonstration flights, which included simulated shipboard integration tests. In November 2015, AgustaWestland stated that the SW-4 Solo was "ready for sale". In 2006, PZL-Świdnik entered into an agreement with China's Jiujiang Hongying Technology Development Ltd. which aimed for the establishment of an SW4 assembly line in Jiujiang, China. In December 2008, a type certification for the SW-4 was issued by the Civil Aviation Administration of China. In late February 2010, the maiden flight of the first SW-4 to be co-produced in China took place; in the same month, PZL Swidnik announced an agreement to produce 150 helicopters, an unspecified number of which being the SW-4, were to be produced for the Chinese market at Jiujiang. By March 2015, a total of five co-produced SW-4s had been delivered to Chinese customers. In February 2016, an upgraded model of the SW-4 for the civil market, designated as the AW009, was revealed at Heli-Expo. Amongst the changes to this commercial variant include flight performance changes to provide for increased smoothness and greater control authority, the integration of a mass vibration absorber, the adoption of a Genesys Aerospace glass cockpit common to the larger AgustaWestland AW119 Koala, hydraulic improvements, and an optional upgraded Model 250-C30R engine. Design The SW-4 is powered by a single 335 kW (450 shp) (283 kW/380 shp max continuous rated) Rolls-Royce Model 250C20R/2 turboshaft engine, which drives the rotorcraft's three-blade main rotor and two-blade tail rotor. An alternative engine is provided in the form of the 460 kW (615 shp) Pratt & Whitney Canada PW200/9 turboshaft engine. The main rotor is fully articulated and the rotor blades on both the main and tail rotors are composed of composite