Sukhoi Su-75 Checkmate

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Su-75 "Checkmate"
Vladimir Putin in MAKS Airshow 2021 12.jpg
A static mock-up of the Sukhoi LTS at the MAKS Airshow 2021
Role Stealth light multirole fighter
National origin Russia
Manufacturer Sukhoi
Designer Sukhoi
First flight 2023 (planned)
Introduction 2027 (planned)
Status Under development

The Sukhoi Su-75 "Checkmate"[1] (Russian: Сухой Су-75; LTS, short for Light Tactical Aircraft in Russian), is a single-engine, stealth fighter aircraft under development by Sukhoi for export and for the Russian Aerospace Forces.[2] The Sukhoi Design Bureau also designates the aircraft as T-75 with marked registration RF-0075.[3]

Development[]

A static mock-up was unveiled at the 2021 MAKS air show with President of Russia Vladimir Putin in attendance. The Checkmate's maiden flight is expected in 2023 and initial deliveries are planned for 2026-2027.[4][5][6] The Checkmate is designed to be low cost and for export,[7] and may compete with the Lockheed Martin F-35 Lightning II and Shenyang FC-31 aircraft of the same light to medium-weight category.[8][9][10] Production is forecast to be 300 planes over 15 years.[11][12]

According to the chief executive of Rostec, Sergei Chemezov, the LTS ‘Checkmate’ Fighter Jet is expected to cost US $25-30 million each.[13]

On 14 November 2021, it was reported that the production of several prototypes of the Checkmate had begun at the Komsomolsk-on-Amur Aircraft Plant, where the Sukhoi Su-57 is manufactured.[14]

Design[]

The Su-75 Checkmate has a diverterless inlet, a v-shape tail and internal weapons bays—all features intended to reduce radar signature. Its vast wing area implies Sukhoi designed the fighter to fly and engage in combat at high altitudes—40,000 feet or higher.[2][15]

The angular ventral inlet, which wraps around the lower nose section, shares features with a diverterless supersonic inlet (DSI) design concept first introduced[16][17] in the Boeing X-32 aircraft.[18][19][4][20] A diverterless supersonic inlet (DSI) is mechanically simple; DSI can reduce cost compared to more intricate inlet designs such as Boeing F-15 and Sukhoi Su-27.[21] Instead of separate horizontal and vertical stabilizers with moving rudders and elevators, the Su-75 fighter has “ruddervators” similar to that of Northrop Grumman YF-23.[22][19] Ruddervators require sophisticated flight-control systems to be developed by Sukhoi as the functionality does not exist in Su-35 and Su-57 fighters.[22]

According to the jet's designers, the Checkmate is designed to fly with a range of up to 3,000 km (1,864 mi), carry a payload of up 7,400 kg (16,314 lb), and reach speeds of up to Mach 1.8-2.[5][23][24] The fighter jet will also feature an internal weapons bay with five missiles and an autocannon.[23][25]

Engine[]

Mock-up of the Checkmate's engine

The powerplant appears to be the Saturn izdeliye 30 engine which will also power the Sukhoi Su-57's Su-57M variant.[26][3] The izdeliye 30 is designed to be 30% lower specific weight than its AL-41F1 predecessor, and up to 18% more effective, with an estimated thrust of 107.9 kN (24,300 lbf) dry and 171.7 kN (38,600 lbf) in afterburner. Once in series production, the izdeliye 30 engine will have a much longer life span than other Russian engines.[27][28]

Cockpit[]

Due to restrictions preventing taking cockpit photos, NBC News Matt Bodner, the first Western journalist able to see the jet in person, provided a preview without a point of view photo. According to Bodner, the cockpit layout is identical to the Su-57 with a glass cockpit with two 38 cm (15 in) main multi-functional LCD displays similar to the arrangement of the Su-35S. The cockpit has a wide-angle (30° by 22°) head-up display (HUD).[29]

Avionics[]

The electronic infrastructure of the Checkmate is all open-architecture and makes use of “Matryoska” diagnostics systems that are mostly on-board.[10] According to Russian newspaper Top War, the prototype Su-75 is built with an active phased array radar. According to Yuri Beliy, NIIP radar design bureau plans to develop a low-cost AESA radar for the aircraft.[10] According to Deputy Prime Minister Yuri Borisov, the Checkmate fighter jet will share the same components and avionics as the Su-57 as a cost-reduction mechanism by the Sukhoi Design Bureau.[30][31]

Checkmate's armaments were displayed besides the mock-up airframe

Armament[]

The Rostec chief executive said in an interview with the Wall Street Journal that the Su-75 fighter will carry air-to-air and air-to-surface armaments over 7 tonnes and will be capable of striking several targets at a time.[32]

Variants[]

An unmanned variant is reportedly in development, a two-seat trainer version can be developed if requested,[33] and a carrier-based version[10] is also under consideration.[34]

Potential operators[]

Rostec is anticipating that Argentina, India and Vietnam will become the primary export destinations for the aircraft, with the African market also showing interest.[35] Sukhoi aims to export 300 Su-75 Checkmate aircraft to African countries over the next 15 years.[36][30] The jet has also been pitched for export to Turkey, Saudi Arabia and the United Arab Emirates.[37]

In SITDEF-2021, Alexander Mikheev, the General Director of product export of Rosoboronexport stated that there was interest in the Su-75 in a number of South American countries.[33]

Specifications[]

Data from Flight Global,[1] Breaking Defense,[10] Suciu,[38] Lieser[39] and Filseth[40]

General characteristics

Performance

  • Maximum speed: Mach 1.8
  • Ferry range: 3,000 km (1,900 mi, 1,600 nmi)
  • g limits: +8.0
  • Thrust/weight: 1.0:1

Avionics

See also[]

Related development

Related lists

References[]

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  2. ^ a b Axe, David. "Russia's New Fighter Breaks Cover—It's Got 'Stealth' Written All Over It". Forbes. Archived from the original on 18 July 2021. Retrieved 30 July 2021.
  3. ^ a b Donald, David (20 July 2021). "New Sukhoi Fighter Design Unveiled at MAKS". AINonline. Archived from the original on 20 July 2021. Retrieved 20 July 2021.
  4. ^ a b Newdick, Thomas. "Russia's Checkmate Light Tactical Fighter Is Officially Unveiled (Updated)". The Drive. Archived from the original on 20 July 2021.
  5. ^ a b Isachenkov, Vladimir (20 July 2021). "Putin hails Russia's air power as new fighter goes on view". AP NEWS. Archived from the original on 20 July 2021. Retrieved 20 July 2021.
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External links[]

Media related to Sukhoi S-75 at Wikimedia Commons

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