After the maiden flight of China’s tiltrotor, another high-speed rotorcraft prototype as a compound coaxial helicopter similar to S-97 made its appearance.
The new coaxial compound helicopter from China made its appearance not too long after the unnamed tiltrotor prototype, which was understood to be a counterpart to the Italian AW609 rather than the U.S.-made MV-75.
Externally, the helicopter bears an unignorable resemblance to Sikorsky’s S-97 prototype, which was the demonstrator for the cancelled Raider X attack helicopter. However, some roughness can be observed on intakes, exhaust, and rotor hub sections, whereas S-97 has a noticeable streamlining in said sections. It is possible that it is because of the helicopter seen on social media is a prototype as S-97 performed its maiden flight in a similar state. While streamlining is not a huge deal for a normal helicopter, designs like this require more attention as drag becomes a massively dictating factor at speeds in excess of 300 km/h.
The configuration combines coaxial rotors with a pusher propeller that is connected to the gearbox through a clutch to allow optimal handling in both low-speed and high-speed flight. The pusher propeller and the balanced lift distribution on coaxial rotors allow for a maximum speed well beyond 400 km/h in such configurations.
Compound helicopters can be described as an alternative route to high-speed VTOL aircraft. Multiple configurations have been developed and tested, with the coaxial rotor-based compound helicopters having more advantages in terms of high-speed stability, as single-rotor helicopters experience lift loss at the retreating blade side and the opposite at the advancing side.
Compared to tiltrotor aircraft, compound helicopters provide significantly better efficiency at hover and low-speed flight states due to being closer to a conventional helicopter in these situations.
It is well recognised that in many of its military programmes, China has first replicated U.S. technological advances and then attempted to add its own layers of innovation in order to build a distinct doctrine. In this respect, recalling the S-97 Raider is instructive. The logic behind it may also shed light on China’s tiltrotor helicopter programme, unveiled only a few days ago.
The S-97 Raider was developed as a private initiative by Sikorsky, but it was explicitly designed with the U.S. Army’s Future Vertical Lift (FVL) architecture in mind. The FVL construct was never meant to deliver a single aircraft; rather, it envisaged a “family” of systems, each tailored to different mission categories.
Most notably, the scaled-up Raider-X was offered for the Army’s Future Attack Reconnaissance Aircraft (FARA) competition. This requirement emerged from several operational gaps:
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To address the Army’s long-standing shortage of light attack and reconnaissance helicopters.
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To take over the mission set of the OH-58D Kiowa Warrior, retired in 2014, by providing higher speed, greater range, and integration of modern sensors and weapons.
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To reduce the strain on the larger, costlier AH-64 Apache, which had increasingly been tasked with armed reconnaissance missions for which it was never optimally suited.
In simple terms: S-97 Raider → technology demonstrator; Raider-X → formal bid for FARA. The programme’s central aim was to fill the reconnaissance/attack gap left by the OH-58.
The FVL framework and mission classes
The Army’s FVL vision defined several categories, often referred to as Light, Medium, Heavy, and Ultra:
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FARA (Future Attack Reconnaissance Aircraft) → Small/medium class; armed reconnaissance and light attack. (The Raider-X competed here.)
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FLRAA (Future Long Range Assault Aircraft) → Medium class, designed to replace the UH-60 Black Hawk. The competition pitted Bell’s V-280 Valor against the Sikorsky-Boeing Defiant X. Core missions: air assault, logistics, and troop transport.
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FVL-Heavy → A future successor to the CH-47 Chinook heavy transport helicopter.
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FVL-Ultra → A conceptual, strategic-range logistics platform with very high payload capacity.
The role of the S-97 / Raider
The Raider was never meant as a logistics or troop-carrying workhorse. Its primary purpose was armed reconnaissance, with the ability to conduct light attack missions. At most, it could insert a small special forces element—two to four personnel—under niche circumstances.
TurDef's analyse is;
On the Chinese tiltrotor: initial imagery shows a mid-sized aircraft with fixed engines and tilting proprotors—a configuration choice that aligns more with Bell’s V-280 architecture than with the V-22’s tilting nacelles. This design can simplify nacelle complexity and improve maintainability while preserving cruise efficiency. Early open-source reads compare its overall scale more to the civilian AW609 than the V-22, which hints at a first step toward a versatile, ship-capable, long-range utility platform rather than a heavy assault asset from day one. Operationally, that fits PLA priorities: fast logistics to island outposts, special-mission insertions, and rapid ship-to-shore movement in the first island chain.
In parallel, images of a Chinese compound helicopter—coaxial main rotors plus a pusher prop—reveal a machine that is strikingly close to Sikorsky’s S-97 form factor (and by extension, the scaled Raider-X once bid into FARA). If matured, this track provides high dash speed, tight “nap-of-the-earth” maneuvering, and the kind of small-footprint armed reconnaissance utility that made the S-97 concept attractive in the first place. It’s a play for the armed scout/light attack niche that the U.S. initially sought to fill with FARA.
The U.S. baseline matters for context. Under FVL, the Army selected V-280 (now moving forward as FLRAA) to replace a significant portion of the Black Hawk fleet—prioritising speed, range, and Pacific-relevant reach. Meanwhile, FARA—the Raider-X vs. Invictus armed scout contest—was cancelled in 2024 amid a rethink driven by the ubiquity of inexpensive drones and layered sensors in contested airspace. The U.S. conclusion: tiltrotor for long-range assault survives and scales; manned armed scout becomes less compelling relative to teaming Apaches and UAS.
China appears to be hedging both bets at once. Strategically, that makes sense:
Geography: the PLA’s maritime theater demands reach—to move people and supplies quickly across water without runways. Tiltrotors are purpose-built for that role.
Tactics: in littoral hot zones crowded with sensors, a smaller, faster compound helicopter can execute armed reconnaissance and time-sensitive strikes while exploiting cover and terrain masking—roles the U.S. initially envisioned for FARA-class aircraft.
Industrial learning: Beijing has been incubating tiltrotor concepts for years (e.g., “Blue Whale” quad-tilt ideas), so today’s crewed prototype is less a bolt from the blue and more an incremental leap from design studies to flight test.
What this likely means in practice
Expect the tiltrotor to mature toward maritime utility: logistics to island garrisons, CASEVAC/MEDEVAC, special forces insertions, and eventually shipborne assault support from LHD-type decks. If performance approaches V-280-class metrics, it will thicken the PLA’s ability to project power quickly across the straits.
At the doctrinal level, China seems to be replicating the FVL family logic even as the U.S. pruned it—pursuing a long-range assault pillar (tiltrotor) and a high-speed rotorborne pillar (compound). Whether both reach squadron service will depend on flight-test truth and budget.
Bottom line: the S-97/FLRAA playbook is an excellent lens. China is trialing the same two levers—tiltrotor reach and compound speed/agility—to stitch together a more flexible vertical-lift doctrine for the Western Pacific. The prototypes are early, but the intent is clear.
Author: Kaan Azman
Editor:Özgür Ekşi
