Tekever AR3

Portugal's tactical fixed-wing VTOL UAS — a gasoline-powered ISR platform battle-proven in Ukraine, fielded as the RAF's StormShroud electronic warfare asset, and the hardware backbone of Europe's newest defence-technology unicorn.

Overview

The Tekever AR3 is a fixed-wing, gasoline-engine intelligence, surveillance and reconnaissance (ISR) unmanned aerial system (UAS) with an optional vertical take-off and landing (VTOL) kit. Designed by Portugal-based TEKEVER, it fills the gap between small electric quadcopters and larger medium-altitude long-endurance platforms. The airframe first gained operational relevance through an expansive UK Home Office maritime-surveillance contract and then became one of the most combat-validated NATO-side tactical drones after years of intensive use by Ukrainian forces. In its upgraded AR3 EVO guise and the Royal Air Force’s StormShroud electronic-warfare variant, the platform has steadily expanded from pure ISR into suppression of enemy air defences and manned-unmanned teaming.

Development

TEKEVER was founded in 2001 as a technology company, progressively shifting into autonomous systems. The AR3 product line consolidated around 2015–2019, and the UK Home Office awarded a maritime surveillance-as-a-service contract around 2019 that gave the drone its first large institutional launch, a deal later reported as worth up to £1 billion UK Defence Journal. When Russia’s full-scale invasion of Ukraine began in 2022, the British government started purchasing Tekever drones through Task Force Kindred on behalf of Ukraine, with cumulative spending reaching approximately £270 million as of mid-2026 Sky News. By May 2025, as TEKEVER confirmed unicorn status following a funding round that included the NATO Innovation Fund, the company disclosed that its AR3 and AR5 platforms had together accumulated over 10,000 operational combat flight hours in Ukraine FlightGlobal TEKEVER. The combat feedback fed directly into the AR3 EVO redesign, unveiled in February 2026 AR3 EVO.

Design & capabilities

The AR3 is built around a 1.7 m fuselage and 4.2 m wingspan, weighing 25 kg at maximum take-off with a 4 kg payload bay. A gasoline pusher engine in the tail swings a twin-blade propeller, delivering a quoted endurance of up to 16 hours in fixed-wing mode and a cruise speed of 85 km/h EDR Magazine. The optional VTOL kit adds four electric rotors on the wing pylons, halving endurance to about 8 hours but enabling operation from a 5×5 m area, including ship decks, without catapult or runway infrastructure. The AR3 EVO iteration, inspired by Ukraine-era combat data, claims a 70 percent endurance boost in VTOL mode (an estimated 13–14 hours) and a 40 percent fixed-wing uplift, plus a 50 -percent larger payload capacity AR3 EVO.

Onboard autonomy is a signature feature. The platform runs TEKEVER’s Atlas AI/ML suite, which performs automated target detection, classification and tracking, and supports GNSS-denied navigation. The standard ground control station offers a 200 km line-of-sight link; a beyond-line-of-sight option is available. Payloads span a gyro-stabilised EO/IR ball, synthetic aperture radar (SAR), infrared sensors across multiple bands, laser target designators, SIGINT/COMINT packages and, most notably in recent years, electronic-warfare suites. In March 2026, TEKEVER flight-tested the Quadsat SpectraLoc EW payload on an AR3 EVO, demonstrating airborne RF detection and direction-finding Unmanned Systems Technology.

Variants

• AR3 (baseline): Original gasoline-pusher design without VTOL as standard; up to 16 h endurance. Supplied to Ukraine from 2022.
• AR3 VTOL: Baseline fitted with the bolt-on electric-rotor VTOL kit; endurance drops to 8 h. Demonstrated at Euronaval 2024.
• AR3 EVO: Announced February 2026. Substantial endurance, payload and maritime-shipborne improvements derived from 10,000+ combat flight hours. Sub-5-minute deployment, modular architecture.
• StormShroud: Royal Air Force designation for the AR3 airframe integrated with Leonardo’s BriteStorm electronic-warfare system. Tasked with jamming, deception and suppression of enemy air defences in manned-unmanned teaming alongside F-35 and Typhoon.

Combat record / operational use

The AR3’s operational credibility rests primarily on its Ukrainian service. Fielded from 2022 via UK-funded Task Force Kindred, Tekever platforms have been used for long-range ISR and artillery fire correction, clocking over 10,000 combat flight hours by May 2025—equivalent to roughly 416 continuous days of flight time Calibre Defence. TEKEVER claims its systems contributed to the destruction of more than £3 billion worth of Russian military assets, although independent verification is not publicly available TEKEVER. In parallel, the UK Home Office has used the AR3/AR5 combo for maritime surveillance in the English Channel since 2019, with the contract renewed in March 2023 for a further three years Unmanned Systems Technology.

The Royal Air Force inducted the StormShroud variant on 2 May 2025, combining the AR3 airframe with Leonardo’s BriteStorm EW suite. The introduction was announced by the Secretary of State for Defence at Leonardo’s Luton facility; the RAF frames StormShroud as the first of a new class of “affordable mass” autonomous aircraft built to protect high-value manned strike packages RAF The Aviationist.

Advantages

• Combat-validated: Over 10,000 flight hours in Ukraine deliver a credibility floor that competitors without frontline experience cannot match.
• Dual-mode launch flexibility: VTOL kit enables ship-deck and unprepared-terrain operations, while fixed-wing mode extends loiter time for deep ISR.
• Long endurance: Gasoline propulsion provides up to 16 h (baseline) and the EVO upgrade pushes this further, outperforming battery-electric rivals in the same weight class.
• Autonomy software: Onboard Atlas AI/ML automates target detection, classification and tracking, cutting analyst workload and accelerating intelligence production.
• Payload-agnostic: The airframe readily integrates EO/IR, SAR, SIGINT and sophisticated EW suites, transforming a single platform from ISR drone to electronic-attack node.

Drawbacks / limitations

• Acoustic and thermal signature: The gasoline engine generates a noise and exhaust heat profile that raises survivability risks in heavily contested, low-altitude environments compared with electric alternatives.
• Endurance trade-off: Adding the VTOL kit halves endurance, forcing a choice between loiter time and vertical-launch convenience.
• Independent performance data: Endurance and EW-resilience claims are manufacturer-supplied; systematic testing in high-intensity contested electromagnetic environments is not publicly documented.
• Recovery footprint: Parachute-and-airbag recovery in fixed-wing mode demands a clear landing zone, limiting operations in dense urban or forested areas.
• Procurement model: TEKEVER’s preference for surveillance-as-a-service contracts can complicate capital acquisition for smaller defence budgets accustomed to outright purchase.

Counterparts

• V-BAT (NATO) — a tail-sitter VTOL ISR platform with similar class footprint and endurance, used by the US and allies.
• Orlan-10 (Russia) — the opposing number in the artillery-correction role, widely fielded by Russian forces and, like the AR3, combat-tested extensively in Ukraine.

Outlook

The AR3 is one of the most operationally validated tactical ISR UAS in Europe, and TEKEVER’s £400 million OVERMATCH programme is embedding manufacturing and autonomy development directly inside the UK defence industrial base. The StormShroud induction and the Project NYX Apache helicopter wingman programme signal a deliberate evolution from ISR drone to manned-unmanned teaming effector. The main near-term question is whether the gasoline-powered design can stay survivable in a battlefield saturated with Russian electronic warfare and air defences, and whether TEKEVER can scale production fast enough to meet simultaneous demand from the UK, Ukraine and emerging NATO customers without sacrificing the quality that earned it a combat reputation in the first place.

Key specifications

Sources

1. RAF — “StormShroud arrival marks the future of UK Air Combat Power.” https://www.raf.mod.uk/news/articles/stormshroud-arrival-marks-the-future-of-uk-air-combat-power//
2. The Aviationist — “UK Reveals StormShroud Electronic Warfare Drone.” https://theaviationist.com/2025/05/02/uk-reveals-stormshroud-electronic-warfare-drone/
3. TEKEVER — “TEKEVER Confirmed as Europe's Newest Unicorn, as It Invests £400M in the UK…” https://www.tekever.com/news/tekever-confirmed-as-europes-newest-unicorn-as-it-invests-400m-in-the-uk-to-drive-ai-driven-defence/
4. FlightGlobal — “Tekever takes lessons from Ukraine to enhance AR3 with Evo upgrade.” https://www.flightglobal.com/military-uavs/tekever-takes-lessons-from-ukraine-to-enhance-ar3-with-evo-upgrade/164443.article
5. TEKEVER — “AR3 EVO” product page. https://www.tekever.com/models/ar3-evo/
6. Sky News — UK government has bought Tekever drones worth £270m on behalf of Ukraine. https://www.facebook.com/skynews/posts/during-the-course-of-the-war-in-ukraine-drones-have-proven-to-be-an-instrumental/1470689971768994/
7. EDR Magazine — “Euronaval 2024 – Tekever presents its AR3 tactical VTOL UAV.” https://www.edrmagazine.eu/tekever-presents-its-ar3-tactical-vtol-uav
8. UK Defence Journal — “Britain spends £1Bn on drone contract to monitor Channel.” https://ukdefencejournal.org.uk/britain-spends-1bn-on-drones-to-monitor-english-channel/
9. Unmanned Systems Technology — “UK Home Office Contracts TEKEVER for Drone-Based Maritime Surveillance.” https://www.unmannedsystemstechnology.com/2023/03/uk-home-office-contracts-tekever-for-drone-based-maritime-surveillance/
10. Unmanned Systems Technology — “TEKEVER Integrates Electronic Warfare Payload During AR3 EVO UAS Flight Trials.” https://www.unmannedsystemstechnology.com/2026/03/tekever-integrates-electronic-warfare-payload-during-ar3-evo-uas-flight-trials/
11. Calibre Defence — “RAF inducts StormShroud to jam enemy radars.” https://www.calibredefence.co.uk/raf-inducts-stormshroud-to-jam-enemy-radars/
12. NATO Innovation Fund — “NATO Innovation Fund-backed Tekever Becomes Europe's Newest Unicorn.” https://www.nif.fund/news/nato-innovation-fund-backed-tekever-becomes-europes-newest-unicorn/
13. Unmanned Systems Technology — “Autonomous Systems Leader TEKEVER Expands into US Market…” https://www.unmannedsystemstechnology.com/2026/05/autonomous-systems-leader-tekever-expands-into-us-market-opens-north-carolina-hub/