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    Sukhoi S-70 Okhotnik-B

    Sukhoi S-70 Okhotnik-B
    The Okhotnik has been under development since at least 2011, when Sukhoi was selected by the Russian Defence Ministry to lead a programme for a new heavy unmanned reconnaissance and attack drone. The new UCAV is being jointly developed by MiG and Sukhoi, based on data of the earlier Mikoyan Skat UCAV programme.

    The work is carried out by the Novosibirsk Aircraft Production Association (NAPO), part of the Sukhoi company. In the documents, the drone is characterised as a "sixth-generation unmanned aerial vehicle"The first mock-up intended for ground tests was created in 2014. Prototype of the drone was first revealed in July 2017, showing the drone's flying wing configuration.

    In November 2018, the drone performed first series of taxiing, speeding and stopping tests in fully autonomous mode at a runway of the NAPO plant. During the runs, it has reached a maximum speed of 200 km/h.

    On 18 January 2019, the third flyable Su-57 prototype (bort no. 053) was spotted wearing a new digital camouflage paint scheme, with digital silhouette of the Okhotnik on its top and underside and a unique markings on the vertical tail showing the shape of a UCAV flying alongside the shape of Su-57 with a lightning bolt (universally used to show electronic connectivity and data sharing) between the two. 

    Drone control system / TASS
    On 24 January 2019, first flyable prototype of the drone was seen towed at the NAPO plant. According to Russian officials, the Su-57 is being used as a flying laboratory for the testing of the Okhotnik's avionics systems. In late May 2019, Okhotnik performed a series of flight tests during which the drone flew several meters above a runway of the NAPO plant.

    On 3 August 2019, Okhotnik performed its maiden flight. The drone flew for about 20 minutes at an altitude of 600 meters above Chkalov State Flight Test Center in Akhtubinsk, and made several circles around the airfield. On August 7, the Russian Defence Ministry released a video of the first flight.

    On 27 September 2019, Russian MoD released a video showcasing the first flight of Okhotnik alongside Su-57. Reportedly the UAV operated autonomously and flew for more than 30 minutes interacting with the Su-57 to test extending the fighter’s radar and target designation range for use of long-range air-launched weapons from the outside of enemy air defenses.

    Design

    The Okhotnik's design is based on the flying-wing scheme and incorporates use of composite materials and stealth coatings, making the drone low-observable in flight. It has a weight of about 20 tons and a wingspan around 65 feet (20 m). The drone is powered either by a single AL-31F turbofan, as used on the Sukhoi Su-27 fighter aircraft, or by the improved AL-41F derivative installed on Su-35S fighters and Su-57 prototypes.


    Although the first prototype's exhaust nozzle was conventional and could increase the drone's radar signature, future upgrade could see improved exhaust as well as engine inlet as shown by a mock up at the 2019 MAKS International Aviation and Space Salon. The maximum speed of the drone is reportedly 1,000 km/h while carrying its payload internally. It is likely the Okhotnik was designed to act as a "loyal wingman" controlled by the Su-57.

    Specifications (Sukhoi S-70)

    General characteristics
    • Crew: none
    • Wingspan: 20 m (65 ft)
    • Empty weight: 20,000 kg (44,092 lb) not verified
    • Powerplant: 1 × Saturn AL-31F or AL-41F, 123–147 kN (28,000–33,000 lbf) with afterburner
    Performance
    • Maximum speed: 1,000 km/h (620 mph, 540 kn)
    • Range: 6,000 km (3,700 mi, 3,200 nmi)
    Armament

    • 2 internal weapons bays for up to 2,000 kg of guided and unguided munitions

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