TB-001 Scorpion

A Chinese twin-boom MALE unmanned combat aircraft used for long-endurance ISR, maritime surveillance and strike carriage, best known for PLA pressure flights around Taiwan and Japan's southwestern approaches.

Overview

The TB-001 Scorpion, also known as the Twin-Tailed Scorpion, is a Chinese medium-altitude long-endurance unmanned combat aerial vehicle developed by Sichuan Tengden Technology Innovation Co., Ltd. It occupies a distinct niche in China's UAV ecosystem: unlike AVIC's Wing Loong family or CASC's CH-series drones, the TB-001 comes from a smaller Chengdu-based firm that the China Aerospace Studies Institute describes as privately owned but state-sponsored, with PLA-facing customers and "Little Giant" industrial-policy status through CASI.

The aircraft is visually unusual for its twin-boom tail and twin-engine layout, with a later three-engine derivative adding a pusher engine to improve payload, ceiling and short-field performance. In PLA service it has become a visible pressure and surveillance platform, particularly around Taiwan's air-defense identification zone and the Miyako Strait, while export activity has centered on Saudi Arabia and Morocco.

Development

Sichuan Tengden unveiled the TB-001 in September 2017, and GlobalSecurity.org dates the type's first flight to 26 September 2017. The company, also rendered in English as Tengdun or Tengoen, is based in Chengdu and traces its technical lineage to the Chengdu 611 Research Institute ecosystem, according to GlobalSecurity's corporate profile.

The baseline aircraft entered public view as a twin-engine, twin-boom MALE UAV before Tengden introduced a three-engine derivative in 2020. Wikipedia's TB-001 summary, drawing on open reporting, describes the later TB-001A as adding a rear pusher engine and increasing take-off weight, payload and operating ceiling compared with the baseline. Sources differ on exact figures: GlobalSecurity lists the three-engine model at 3,600 kg maximum take-off weight and 40 hours endurance, while other open summaries cite ~3,200 kg MTOW and roughly similar endurance to the original aircraft.

Tengden has also pursued civil and cargo derivatives using the same broad twin-boom family. A four-engine Scorpion D cargo drone, covered by The War Zone, first flew in 2022, but that aircraft is a cargo derivative rather than the armed TB-001 UCAV.

Design & capabilities

The TB-001 uses a straight, high-mounted wing, twin tail booms and two turbocharged piston engines driving three-bladed propellers; the TB-001A adds a third pusher engine on the tail structure. Baseline dimensions are reported at roughly 10 m length, ~20 m wingspan and ~3.1-3.3 m height, with maximum take-off weight around 2,800 kg and payload around 1,000-1,200 kg, according to GlobalSecurity.org. Reported endurance is about 35 hours for the baseline, while the three-engine derivative is cited at about 35-40 hours depending on source.

The aircraft is marketed for ISR and strike carriage. It has four underwing hardpoints and has been associated in open reporting with AR-series air-to-ground missiles, FT-series precision-guided munitions, the C-701/K anti-ship missile and the CM-502 air-to-surface missile. The War Zone identifies the platform as combining radar, electro-optical/infrared sensors, electronic-intelligence carriage and weapons pylons, making it relevant to both surveillance and crisis strike scenarios around Taiwan's eastern approaches.

Control is reported as line-of-sight to roughly 280 km from a ground station, with satellite communications extending two-way control to around 3,000 km. Open sources do not establish the aircraft's autonomy level, sensor-suite variants, electronic-protection standard or confirmed combat loadout in PLA service.

Variants

• TB-001: baseline twin-engine Twin-Tailed Scorpion MALE UCAV, reported at ~2,800 kg MTOW, ~35 hours endurance and ~6,000 km range.
• TB-001A: three-engine derivative with an added pusher engine; public figures vary, with reported MTOW around ~3,200-3,600 kg, endurance around ~35-40 hours and range up to ~8,000 km.
• TB-001B: reduced-size, high-endurance ISR derivative listed by GlobalSecurity.org; the Moroccan aircraft reported in 2025 appears closer to this configuration than to the baseline TB-001.
• TB-001D / Scorpion D: four-engine cargo derivative; related by airframe family and branding, but not publicly established as an armed combat variant.

Combat record / operational use

The TB-001's public operational record is concentrated in PLA patrols and pressure flights rather than confirmed weapons employment. In July 2022, Chinese state media said a TB-001 flew a full circuit around Taiwan via the Miyako Strait and Bashi Channel during Taiwan's Han Kuang exercises, with Global Times framing the sortie as the PLA's first full island-circling drone flight.

On 28 April 2023, Taiwan's Ministry of National Defense reported a TB-001 route that crossed the Bashi Channel, flew along Taiwan's east coast and returned toward China. The Guardian described the flight as a rare full circuit by a Chinese combat drone, while The Defense Post reported it among 38 PLA aircraft detected near Taiwan that day. The operational significance is less the route itself than the message: a long-endurance UAV can surveil Taiwan's eastern side, where air bases and naval access points matter in a blockade or strike scenario.

Japan has also tracked TB-001 activity near the East China Sea, Miyako Strait and Okinawa approaches. In June 2026, a TB-001 flew with a Shaanxi Y-9 intelligence aircraft near Japan's southwestern islands, prompting fighter scrambles; Defence Security Asia reported Japan's concern that the drone can be configured with anti-ship and surface-strike weapons, though no ordnance was confirmed on that sortie.

Advantages

• Long endurance gives China a persistent ISR platform for Taiwan, Bashi Channel, Miyako Strait and East China Sea patrol geometry.
• Twin-engine baseline and three-engine derivative offer redundancy and payload-growth options uncommon among lower-cost piston MALE UAVs.
• Four underwing hardpoints allow carriage of precision-guided weapons and anti-surface munitions, at least in marketed or displayed configurations.
• Satellite-control reporting gives it a wider operating radius than purely line-of-sight tactical UAVs.
• Tengden's smaller, state-supported industrial profile may offer China additional UAV production diversity outside AVIC and CASC.

Drawbacks / limitations

• Public evidence shows pressure patrols and ISR activity, not confirmed combat weapons release.
• Performance data varies across sources, especially for the TB-001A's MTOW, endurance, ceiling and range.
• Piston propulsion limits speed and survivability against modern air defenses compared with faster, higher-altitude turboprop or jet UAVs.
• Export record remains thin compared with Wing Loong, CH-4 and MQ-9 Reaper fleets.
• Key subsystem suppliers, sensor standards and electronic-warfare resilience are not publicly established.

Counterparts

• Wing Loong 3 (CN long-range MALE UCAV)
• CH-4 Rainbow (CN MALE UCAV)
• MQ-9 Reaper (US MALE UCAV)

Outlook

The TB-001 is likely to remain valuable to China as a persistent, relatively economical first-island-chain surveillance and signaling platform. Its future weight inside the PLA inventory depends on whether Tengden can translate patrol visibility into larger procurement, more reliable three-engine production, and credible integration with maritime-strike and electronic-intelligence payloads.

Export prospects appear selective rather than mass-market. Saudi Arabia's technology-transfer agreement and Morocco's reported acquisition show that the type can find buyers, but the TB-001 still lacks the broad combat export record of CH-4 or the brand recognition of Wing Loong. The main indicator to watch is whether additional operators select the TB-001 for maritime ISR and strike roles where cost and political availability matter more than top-end survivability.

Key specifications

Sources

1. GlobalSecurity.org — TB001 UAV profile. https://www.globalsecurity.org/military/world/china/tb001.htm
2. Wikipedia — Tengden TB-001. https://en.wikipedia.org/wiki/Tengden_TB-001
3. The Guardian — "Chinese TB-001 combat drone flies around Taiwan, says island's military." https://www.theguardian.com/world/2023/apr/28/chinese-tb-001-combat-drone-flies-around-taiwan-says-islands-military
4. The War Zone — "Chinese TB-001 Scorpion Drone Encircled Taiwan." https://www.twz.com/chinese-tb-001-scorpion-drone-encircled-taiwan
5. The War Zone — "China's Four-Engine Scorpion D Cargo Drone Has Flown." https://www.twz.com/chinas-four-engine-scorpion-d-cargo-drone-has-flown
6. Global Times — TB-001 drone flight around Taiwan report. https://www.globaltimes.cn/page/202207/1271535.shtml
7. The Defense Post — "Chinese Drone Circles Taiwan." https://thedefensepost.com/2023/04/28/chinese-drone-circles-taiwan/
8. Atalayar — "Morocco reinforces its air power with Chinese Twin-Tailed Scorpion drones." https://www.atalayar.com/en/articulo/politics/morocco-reinforces-its-air-power-with-chinese-twin-tailed-scorpion-drones/20250312130802212161.html
9. Defence Security Asia — TB-001 and Y-9 activity near Okinawa / Japan fighter scramble. https://defencesecurityasia.com/en/china-tb001-drone-y9-spy-plane-okinawa-japan-fighter-scramble-east-china-sea/
10. China Aerospace Studies Institute — "Sichuan Tengden Technology: Privately Owned, State Sponsored." https://www.airuniversity.af.edu/Portals/10/CASI/documents/Research/Infrastructure/2022-11-07%20Sichuan%20Tengden%20Technology%20Privately%20Owned%20State%20Sponsored.pdf

Image - A Tengden TB-001 Scorpion on display at the Zhuhai Airshow, November 2022. Photo by Infinty 0, CC BY-SA 4.0, via Wikimedia Commons.

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