Su-75 Checkmate

Russia's "PowerPoint fighter" — a single-engine stealth jet pitched at export buyers who want fifth-generation capability cheaply and without American strings. Unveiled as a full-scale mockup in 2021 with Vladimir Putin in attendance, it has, years later, still never flown, lost the foreign funding it counted on, and signed no customer. Its honest entry in this Lexicon is a counter-story: how a stealth-fighter program can stay frozen at the mockup stage.

Overview

The Su-75 Checkmate (Light Tactical Aircraft / LTS; bureau designation T-75) is a single-engine, single-seat fifth-generation stealth fighter from Sukhoi and United Aircraft Corporation under Rostec, aimed squarely at the export market — pitched at roughly $25-30 million a copy against an F-35A's $80-110 million, for buyers wanting stealth without Washington's conditions. Russia unveiled a full-scale mockup at the MAKS 2021 air show with Putin present — and that is essentially where the program has remained. The defining fact, stated plainly: as of mid-2026 the Su-75 has never flown, its first-flight date has slipped repeatedly, it has no confirmed flying prototype, and it has no launch customer. Everything below the concept is a claim. It is the foil to Russia's twin-engine Su-57 Felon, which has actually flown and exported.

Development

Russia unveiled the Checkmate as a mockup at MAKS 2021, promising a first flight in 2023. That date then slipped to 2024, to 2025, and to "early 2026" — and still no flight or real prototype has been confirmed. The reasons are structural: Western sanctions choked access to advanced chips and machine tools; the UAE, courted as a partner, paused its involvement and with it "critical" funding; and the full-scale war in Ukraine redirected Russia's defence-industrial base toward immediate needs. Russia continues to insist a flight is imminent and has at times claimed prototype assembly is under way — but the consistent pattern is announcement without delivery. (One reconciliation: an occasional "Dubai 2021" debut claim is outweighed by the sourcing placing the unveiling at MAKS 2021 in Moscow.)

Design & capabilities

On paper the Checkmate is an ambitious single-engine stealth fighter: claimed Mach 1.8, an internal weapons bay, a payload up to roughly 7,400 kg, AI-assisted systems, and talk of an optionally-uncrewed/"loyal wingman" derivative. The single-engine, lightweight configuration is the pitch — fifth-generation traits at a fraction of the cost and complexity of twin-engine jets. But every one of those figures is a manufacturer/marketing claim against an aircraft that has not flown, so they carry no test validation. With sanctions constraining the very components (engines, avionics, stealth materials, fabrication tooling) a modern fighter needs, the gap between the brochure and a flying, producible aircraft is the entire story.

Variants

None exist. Russia has floated an optionally-piloted / uncrewed "loyal wingman" derivative and a possible two-seat version, but with no flying baseline aircraft these are concepts, not variants.

Combat record / operational use

None. The Su-75 has no operators, no orders, and no operational or combat use. It has been marketed aggressively to India, the UAE, Iran, Vietnam, Algeria and various African states, but none has committed — there is no launch customer.

Advantages

• Concept: affordable stealth — fifth-gen traits at a pitched ~$25-30M, with no US political strings.
• Single-engine simplicity — lower cost and maintenance than twin-engine fifth-gen jets (in theory).
• Export-tailored — aimed at buyers shut out of, or unwilling to accept, Western terms.
• Sukhoi pedigree — drawing on the design base behind the Su-57.

Drawbacks / limitations

• Unflown — a mockup/PowerPoint program; no confirmed prototype or first flight years on.
• No funding or customer — the UAE pulled back; no launch order anywhere.
• Sanctions-choked — limited access to the chips, tooling and components a fifth-gen jet requires.
• All claims — every performance figure is unvalidated marketing.

Counterparts

The Checkmate's intended rivals are the single-engine F-35 and the lighter end of the fifth-gen field — South Korea's KF-21 Boramae, China's J-35A, Turkey's TF Kaan, and 4.5-gen options like the Gripen at the affordable end — while within Russia it stands against the flying, exported Su-57 Felon. The brutal contrast: the KF-21, J-35 and even the Su-57 have flown and progressed; the Checkmate has not.

Outlook

The Su-75's outlook is, candidly, doubtful. Without a flying prototype, a funding partner, or a launch customer — and with sanctions biting the industrial base — it risks remaining a показуха showpiece. It could still revive if a deep-pocketed export buyer materialised, but the credible base case is continued slippage. The watch-items are stark and binary: an actual first flight (the single fact that would change the story), any real launch order, and any sign sanctions relief or a foreign partner has restored funding. Logged as a development program whose defining feature is non-delivery — the cautionary counterpoint to the world's other fifth-gen efforts.

Key specifications

Sources

1. Sukhoi Su-75 Checkmate — Wikipedia
2. Russia insists the Su-75 Checkmate fighter will fly next year — The War Zone
3. Russia's Su-75 Checkmate stealth fighter is now "frozen in time" — National Security Journal
4. Russia's Su-75 Checkmate program — TASS
5. Russia plans a first flight of the Su-75 Checkmate in 2026 — Army Recognition
6. Russia says the "PowerPoint fighter" may finally fly — National Security Journal
7. Su-75 Checkmate first flight in 2026? — Defence Security Asia
8. Flight of fancy: Russia says the Su-75 will fly by 2026 — The National Interest
9. Russia's Su-75 Checkmate is "frozen in time" — 19FortyFive
10. Russia launched a perfume to sell the Su-75 Checkmate — National Security Journal

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