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S-70 Okhotnik-B
S-70 prototype 071 taxiing after 2019 maiden flight
Role	Unmanned combat aerial vehicleType of aircraft
National origin	Russia
Manufacturer	Novosibirsk Aircraft Production Association Plant
Designer	Sukhoi Mikoyan
First flight	3 August 2019
Introduction	2024
Status	In development
Primary user	Russian Aerospace Forces
Produced	2019–present
Number built	2
Developed from	Mikoyan Skat Sukhoi Su-57

External videos
Russian MoD Okhotnik coverage
Okhotnik's maiden flight on YouTube
Extended video of the first test flight on YouTube
Okhotnik's first flight with Su-57 on YouTube

The Sukhoi S-70 Okhotnik-B (Template:Lang-ru), also referred to as Hunter-B, is a Russian ”stealth” heavy unmanned combat aerial vehicle (UCAV) being developed by Sukhoi and Russian Aircraft Corporation MiG as a sixth-generation aircraft project. The drone is based on the earlier Mikoyan Skat, designed by MiG, and encompassing some technologies of the fifth-generation Sukhoi Su-57 fighter jet. In the future, it is planned to act under the control of pilots of Su-57 jets, similarly to the USAF Skyborg programme.

Development

The Okhotnik has been under development since at least 2011, when Sukhoi was selected by the Russian Defense 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. 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.

On 12 February 2021, it was reported that three additional prototypes were under construction at the Novosibirsk Chkalov Aviation Plant, according to a source in the military-industrial complex. The second model is a modified copy of the 1st prototype while the 3rd and 4th prototypes will be identical to the serial production unit. The improvements will relate to the systems of onboard radio-electronic equipment and structural elements of the airframe. The three additional prototypes should be ready for flight tests in 2022 and 2023. The source in the military-industrial complex also said that the serial Hunter will receive a standard flat nozzle to further reduce their thermal and radar signature.

On 28 February 2021, it was reported that the Okhotnik will be used aboard the future Project 23900 Ivan Rogov amphibious assault ships, capable of carrying 4 Okhotnik drones, for reconnaissance and strike missions.

The second prototype was rolled out in December 2021, with a new flat jet nozzle.

Okhotnik reportedly tested unguided weapons like free-fall bombs in 2021 and carried out tests with precision-guided munitions in 2022.

In August 2023, it was reported that state tests for the Okhotnik will be completed by the end of 2023, with the drone expected to enter mass production in 2024. The vice-governor of Novosibirsk oblast said in January 2024 that serial production of Okhotnik will begin in the second half of 2024.

Design

The Okhotnik's design is based on the flying-wing scheme and incorporates use of composite materials and stealth coatings, reducing the drone's radar cross section 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.

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.

The aircraft bears some visual resemblance to the U.S. RQ-170. It is speculated that the Russian engineers could have had access to the one that was captured by Iranians, but the similarly designed flying-wing Mikoyan Skat had already been in development since 2005, and the Okhotnik is a further development by Sukhoi of the former MiG design.

Non-stealth features

While a S-70 model shown at the 2019 MAKS International Aviation and Space Salon features low-observable apertures, the first prototype's exhaust nozzle is conventional providing no reduction of infrared signature nor of radar cross section.

The S-70 prototype that was downed over Ukraine in October 2024 was causing non-stealthy contrails to be formed prior to being shot down.

Operational history

On 1 July 2023, one of the reportedly two operational S-70 was photographed while flying over the Sumy region in apparent aerial reconnaissance during the Russian invasion of Ukraine.

On 5 October 2024, an S-70 was shot down by an air-to-air missile possibly fired by a Russian airframe near Ukrainian-held Konstantinivka, Ukraine.

Specifications (Sukhoi S-70)

Data from TASS, Ainonline

General characteristics

• Crew: None
• Wingspan: 20 m (65 ft)
• Empty weight: 10,000 to 20,000 kg (22,046 to 44,092 lb) (not confirmed)
• Max takeoff weight: 25,000 kg (55,116 lb)
• Powerplant: 1 × AL-41F derivative

Performance

• Maximum speed: 1,000 km/h (620 mph, 540 kn) 0.82 Mach
• Range: 6,000 km (3,700 mi, 3,200 nmi)
• Combat range: 3,000 km (1,900 mi, 1,600 nmi) (Less than )

Armament

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

See also

• Sixth-generation jet fighter

Related development

• Mikoyan Skat
• Sukhoi Su-57
• Sukhoi Su-75 Checkmate

Aircraft of comparable role, configuration, and era

• Baykar Bayraktar Kızılelma
• Hongdu GJ-11
• Northrop Grumman X-47B
• Boeing Phantom Ray
• Boeing MQ-28 Ghost Bat, formerly "Loyal Wingman"
• Lockheed Martin RQ-170 Sentinel
• Shahed 171 Simorgh
• TAI Anka-3
• Northrop Grumman RQ-180
• Dassault nEUROn
• DRDO Ghatak
• BAE Systems Taranis
• Kratos XQ-58 Valkyrie

References

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External links

• Sukhoi Design Bureau Archived 2020-09-17 at the Wayback Machine

• Single-engined jet aircraft
• Unmanned military aircraft of Russia
• Sukhoi aircraft
• Unmanned stealth aircraft
• Aircraft first flown in 2019
• Flying wings