Spain Demonstrates Advanced Crewed-Uncrewed Teaming with H135 and Flexrotor

Spain Advances in Crewed-Uncrewed Teaming with Successful Naval Demonstration

The landscape of modern aerial operations is undergoing a significant transformation, driven by the integration of uncrewed systems with traditional crewed aircraft. This concept, known as Crewed-Uncrewed Teaming (CUC-T), aims to leverage the strengths of both human decision-making and autonomous technology to create a powerful force multiplier. In a notable advancement for European defense capabilities, Spain has recently positioned itself at the forefront of this innovation. A landmark demonstration in May 2025 saw the Spanish Navy and Airbus Helicopters successfully team up an H135 helicopter with a Flexrotor uncrewed aerial system (UAS), showcasing a high level of interoperability and setting a new benchmark for future military operations.

This successful trial is more than just a technical exercise; it represents a strategic step forward in enhancing mission effectiveness, improving situational awareness, and, most critically, increasing the safety of military personnel. By allowing a helicopter crew to remotely operate a drone and receive its sensor data in real-time, the operational reach of the crewed asset is extended far beyond its own physical limits. This allows forces to conduct reconnaissance and surveillance in high-risk environments without directly exposing the crew to potential threats. The demonstration underscores a broader trend among modern armed forces to adopt and refine CUC-T as a core component of their operational doctrine, reflecting a commitment to technological superiority and personnel protection.

A Technical Milestone: The H135 and Flexrotor Integration

The demonstration, held at the Coronel Maté Spanish Army airbase in Colmenar Viejo, Madrid, was a collaborative effort between the Spanish Navy and Airbus Helicopters. The primary objective was to validate the seamless integration of a crewed helicopter, the Spanish Navy’s H135 ‘Nival’, with a highly capable UAS, the Airbus-built Flexrotor. The goal was to prove that the helicopter’s crew could not only receive data from the drone but also take direct control of its flight path and sensor payloads, effectively turning the UAS into an extension of the helicopter’s own systems.

Achieving a High Level of Interoperability

The trial successfully achieved Level of Interoperability (LOI) 4, as defined by NATO’s STANAG 4586 standards. This is a significant technical achievement, as LOI 4 signifies that the crew of the manned aircraft can directly command both the flight of the UAS and the operation of its onboard sensors from their own cockpit. This level of control moves beyond simply receiving video feeds to actively directing the uncrewed asset as a tactical tool in a dynamic environment. This capability was made possible through Airbus Helicopters’ proprietary HTeaming system, a modular solution specifically designed to facilitate this complex integration.

The practical implications of this achievement are profound. It allows the helicopter to remain at a safe “stand-off” distance while the drone ventures into potentially hazardous areas to gather intelligence. The real-time data stream enables faster and better-informed decision-making, a critical advantage in time-sensitive missions. The ability to control the drone’s sensors directly means the crew can investigate points of interest on the ground or at sea with precision, withoutaltering the helicopter’s own position or flight path.

Luis Martín Díaz, Head of Customers and Programmes at Airbus Helicopters in Spain, stated: “The association with the Flexrotor converts the helicopter into a force multiplier, enabling rapid collection and distribution of data in real time to allow informed decision-making, and also reduces the crew’s exposure to dangerous and no-go areas.”

The Flexrotor UAS: A Versatile Asset

The choice of the Flexrotor UAS for this demonstration was strategic. As a Group 2 small tactical UAS, it is designed for Intelligence, Surveillance, and Reconnaissance (ISR) missions. Its Vertical Take-Off and Landing (VTOL) capability is a key feature, requiring only a small 3.7 x 3.7-meter area for launch and recovery. This makes it exceptionally well-suited for naval operations, as it can be deployed from ships that lack a traditional flight deck, greatly expanding its operational flexibility.

With a maximum take-off weight of 25 kg (55 lbs), the Flexrotor boasts an impressive endurance of 12-14 hours in a typical mission configuration, with the potential to fly for over 30 hours. This long flight time allows for persistent surveillance over a wide area. Furthermore, it can be assembled and made airborne in under 30 minutes, providing a rapid response capability when needed. Its ability to carry a variety of advanced sensor payloads makes it a versatile tool for data collection in diverse operational scenarios.

Part of a Broader National and International Strategy

This successful CUC-T demonstration was not an isolated event but rather a key component of Spain’s broader strategy to invest in and develop advanced defense technologies. The Spanish Ministry of Defence has shown a clear commitment to integrating unmanned systems, viewing them as essential for maintaining a modern and effective military. This vision is being realized through participation in both national and international collaborative projects.

European Collaboration and NATO Relevance

Spain’s involvement extends to major European defense initiatives. The Spanish Ministry of Defence played a role in defining the operational concepts for the EU-funded MUSHER project, which aimed to develop a robust European MUM-T system. The success of MUSHER in integrating assets from different companies and nations laid the groundwork for exercises like the H135/Flexrotor trial. This collaborative approach ensures that Spain’s technological advancements are aligned with those of its European partners, promoting interoperability and shared capabilities.

The technology’s relevance has also been proven on the NATO stage. The Flexrotor UAS was a key asset during the REPMUS 2025 exercise (Robotic Experimentation and Prototyping using Maritime Uncrewed Systems). In this major NATO maritime exercise, naval forces from Spain, Portugal, and Germany collaborated, with the Flexrotor demonstrating its long-endurance ISR capabilities in a complex, multi-national environment. This participation highlights Spain’s active role in shaping the future of NATO’s maritime and aerial operations.

Belén García Molano, Head of Engineering at Airbus Helicopters in Spain, noted: “The commitment of the Spanish Ministry of Defence to projects of this type is of fundamental importance… These advances are not only a response to the increasing demand for more sophisticated and efficient defence systems, but are also a reflection of the country’s investment in talent and technology.”

Fostering a National Defense Ecosystem

Beyond international partnerships, Spain is also cultivating its domestic defense industry. Another initiative highlighting this focus is the collaboration between Airbus Helicopters España and the Spanish drone manufacturer Alpha Unmanned Systems. This project aims to integrate the Alpha A900 UAV with Spanish Army helicopters, further demonstrating a national commitment to developing sovereign CUC-T capabilities. By fostering partnerships between major defense contractors and specialized local companies, Spain is building a robust ecosystem for innovation. This comprehensive strategy ensures that the nation is not only adopting cutting-edge technology but is also actively contributing to its development and refinement.

Conclusion: A New Era for Aerial Operations

The successful demonstration of Level of Interoperability 4 between an H135 helicopter and a Flexrotor drone marks a significant milestone for the Spanish Navy and the nation’s defense industry. It is a clear indicator that Crewed-Uncrewed Teaming is moving from a conceptual phase to a practical, field-ready capability. This advancement provides a tangible “force multiplier” effect, enhancing situational awareness, operational efficiency, and crew safety in a way that will redefine tactical aerial missions.

Looking ahead, this achievement places Spain among the key players shaping the future of collaborative combat air systems in Europe. The continued investment in projects like MUSHER and collaborations with NATO allies and domestic industry partners signals a long-term strategic vision. As these technologies mature, the seamless integration of crewed and uncrewed assets is poised to become a standard operational paradigm, paving the way for a future where human oversight and autonomous systems work in perfect synergy to meet complex security challenges.

FAQ

Question: What is Crewed-Uncrewed Teaming (CUC-T)?
Answer: Crewed-Uncrewed Teaming (CUC-T), also known as Manned-Unmanned Teaming (MUM-T), is a military concept where a crewed aircraft, like a helicopter, works in synchronization with one or more uncrewed aerial systems (UAS) or drones. The crew can control the drone and receive its data, using it to extend their vision, perform reconnaissance in dangerous areas, and improve overall mission effectiveness.

Question: What is the significance of achieving Level of Interoperability (LOI) 4?
Answer: According to NATO standards, LOI 4 is a high level of integration where the crew of the manned aircraft can directly control both the flight path and the sensor payload of the uncrewed system from their cockpit. This is significant because it moves beyond simply viewing a drone’s video feed to actively and precisely controlling the drone as a tactical tool in real-time.

Question: Why is the Flexrotor UAS suitable for these types of missions?
Answer: The Flexrotor is highly suitable due to its combination of Vertical Take-Off and Landing (VTOL), which allows it to operate from small spaces like ships without flight decks; its long endurance of over 12 hours for persistent surveillance; and its advanced sensor payloads for Intelligence, Surveillance, and Reconnaissance (ISR) missions.

Sources: Airbus Newsroom