It is tiny, autonomous and reusable

Anduril, a U.S. defence company specialising in autonomous systems, recently unveiled their Roadrunner and Roadrunner-Munition, a significant advancement for aerial defence technology, that signals a new era in the field of autonomous air vehicles (AAVs) and ground-based air defence systems.

Roadrunner is a modular, twin-turbojet powered AAV designed for versatility and efficiency. Its vertical take-off and landing (VTOL) capabilities offer unprecedented operational flexibility. Its modular payload system accommodates various missions, ranging from firefighting and search and rescue to organ delivery, making it a valuable asset in diverse operational contexts.

Roadrunner-M, the interceptor variant, is a "high-explosive interceptor" that can carry warheads and can identify, intercept, and destroy a wide array of aerial threats, including those significantly more costly than itself. This variant is cost-effective and operationally efficient and can be deployed at a fraction of the cost of traditional defence systems.

Roadrunner is unusual both in appearance and capability: it can take off, following and destroying targets; if there is no need to intercept the target, the vehicle can autonomously manoeuvre back to base for refuelling and reuse. Anduril’s chief strategy officer Chris Brose, recently said in an interview that the company has “basically built a fighter jet weapon that lands like a Falcon was built in response to the rise of fast-moving, autonomous aerial weapons that can be produced at a high volume and meagre cost, that present a new kind of threat, Brose said. Unlike other solutions today, and the legacy missile systems that preceded them, the Roadrunner-M can also be reused.

The prevalence of small drones on the modern battlefield demands more agile, dynamic systems to detect and defeat them. As threats become faster, cheaper and more numerous, the U.S. military recognises a need to rebalance cost curves”. Vehicles like Roadrunner-M that promise rapid response, reusable capacity, and integration with legacy capabilities fulfil the requirements identified by the Pentagon. Although their ultimate success is unproven, the Roadrunner indicates the type of experimentation and forward-looking development that could reshape aerial warfare in the years ahead.

“Future threats could be more numerous and faster moving than defenders can manage. We must envision more effective and affordable options than our current approach of using multimillion-dollar missile shots against thousand-dollar drones. We may never achieve exact cost parity with threats, but the solution fundamentally lies in driving down the cost per interception. Piecemeal upgrades of conventional effectors for marginal improvements won’t do it. We must build effectors that are similar in design to the drones they have to defeat: smarter with software, more affordable, and increasingly reusable,” says Brose.

Air defenders must remain on alert 24 hours a day to detect, track, identify, and defeat threats all within minutes and if there is a confirmed drone threat, defenders mainly rely on close-in weapons and high-priced missiles to counter them. Time is wasted as air defenders deconflict with adjacent others in the unit and re-check their systems.

Air defence must provide a layered capability that can detect and affect everything from small, slow-moving drones to fast-flying cruise missiles. More importantly, air defenders need the ability to launch low-cost effectors upon first detection of threats to give commanders more time, space, and better data to prioritise which threats to defeat.

“We must be relentless about pushing the cost curve down for air defenders while simultaneously improving their ability to defeat different types and large numbers of drones and cruise missiles attacking at once. Yet we must also acknowledge that even these next-generation systems will be threatened by countermeasures that adversaries will inevitably develop. Preparing for this future requires embracing open and modular standards that allow for timely updates, building for integration of novel effectors and sensors with existing legacy systems, and constantly adapting our solutions always to keep American and allied warfighters several steps ahead”.