The Pentagon’s premier research and development arm, the Defense Advanced Research Projects Agency (DARPA), is actively pursuing the creation of a prototype for a next-generation hypersonic cruise missile. This initiative aims to deliver a “revolutionary leap in operational performance,” coinciding with the U.S. military’s initial wave of hypersonic weapons transitioning into production and active service.
On August 7, DARPA issued a Request for Information (RFI) to industry partners, signaling the potential launch of a new program designated the Next-Generation Hypersonic Cruise Missile. This notice invites companies to submit information and innovative concepts for the prospective weapon system.
The RFI explicitly outlines the program’s primary objective: “The goal is to design, build, and flight-test a fully integrated hypersonic cruise missile system demonstrator.” This demonstrator is intended to lay the groundwork for a future capability that significantly advances current performance metrics, particularly in areas such as operational range, sustained cruise speed, and flight altitude. DARPA emphasizes that this advanced capability is crucial for maintaining technological superiority, enabling the United States to rapidly engage sophisticated threats within highly contested operational environments.
The agency’s communication further notes that while previous demonstrator programs have successfully validated the fundamental technology behind air-breathing hypersonic weapons, these earlier efforts typically yielded only “predictable, incremental gains in isolated performance metrics.” Such systems have often proven to be complex and expensive, posing challenges for scalable mass production. Consequently, DARPA is now seeking a “quantum leap in overall system performance,” anticipating breakthroughs fueled by “high-risk, high-reward technologies.” While the RFI does not specify these technologies, it suggests a departure from conventional developmental pathways.
Beyond merely increasing speed and range, DARPA is also focused on enhancing other critical performance attributes. These include improved midcourse maneuverability, allowing the missile to adjust its trajectory significantly during flight, and a reduced overall signature, making the weapon harder for adversaries’ integrated air and missile defense systems to detect and track.
DARPA previously explored the capabilities of hypersonic cruise missiles through its Hypersonic Air-breathing Weapon Concept (HAWC) program in the early 2020s. This program, a collaborative effort with the U.S. Air Force and Lockheed Martin, resulted in several successful flight tests. Building on the HAWC’s advancements, the Air Force subsequently initiated the development of the Hypersonic Attack Cruise Missile (HACM) with Raytheon, with budget documents indicating a planned production start for HACM in 2027.
These air-breathing weapons, including HAWC and HACM, utilize a specialized jet engine called a “scramjet” to achieve hypersonic speeds, generally defined as exceeding Mach 5 (five times the speed of sound). This propulsion method distinguishes them from other types of hypersonic weapons known as “boost-glide” vehicles. Boost-glide systems employ solid rocket boosters to propel the vehicle to hypersonic velocities, after which the unpowered vehicle glides to its target, maintaining maneuverability throughout its descent. Air-breathing weapons are typically considered more fuel-efficient and can be designed to be smaller, allowing for integration onto a wider array of launch platforms.
Reflecting this versatility, DARPA’s recent RFI expresses interest in various “classes” of next-generation hypersonic missiles. These range from smaller weapons capable of being carried both internally and externally by fighter aircraft, to medium-sized munitions that could be launched from palletized systems, up to larger weapons requiring launch from bombers or ground-based platforms.
In addition to the development of novel weapon systems, DARPA is also keen on advancing new test and evaluation technologies specifically for hypersonic weapons. The agency acknowledges that the complexity and unique flight characteristics of these systems have made testing a persistent bottleneck in their development cycle.
Current U.S. Hypersonic Weapons Programs
The U.S. Air Force is allocating significant resources to its hypersonic programs, with a primary focus on the HACM. The service’s 2027 budget request earmarks approximately $1.01 billion for HACM, with $404 million allocated for production and $806 million for research, development, test, and evaluation (RDT&E). The exact unit cost of these missiles and the projected number of acquisitions remain classified. Budget documents indicate that the F-15E Strike Eagle is slated to be the first aircraft to field HACM, with the potential for deployment on both fighter and bomber platforms.
Despite a series of test failures several years ago, the Air Force has also revived the Air-Launched Rapid Response Weapon (ARRW) program. ARRW is a boost-glide weapon designed to be carried exclusively by bombers. For 2027, the Air Force is requesting $797 million for ARRW, comprising $452 million for procurement and $345 million for R&D, primarily directed towards a second “increment” or iteration of the weapon.
Concurrently, the U.S. Army and Navy are collaboratively advancing their own boost-glide hypersonic systems. Both services are working to field variants of the same core technology, known as the Long-Range Hypersonic Weapon (LRHW) for the Army and Dark Eagle for the Navy.
Why This Matters
The pursuit of next-generation hypersonic cruise missiles by DARPA underscores a critical strategic imperative for the United States: maintaining a decisive military technological advantage in an evolving global security landscape. As nations like China and Russia aggressively develop and field their own hypersonic capabilities, the U.S. recognizes the need to not only match but exceed these advancements. Hypersonic weapons, with their unparalleled speed and maneuverability, are designed to penetrate sophisticated air defense systems that current conventional missiles might struggle against. This capability significantly enhances the ability to hold high-value, time-sensitive targets at risk in heavily defended territories, thereby bolstering deterrence and projecting power.
This DARPA initiative represents more than just an incremental upgrade; it signals a quest for a “quantum leap” in performance, indicating that current first-generation U.S. hypersonics are seen as foundational, but not the ultimate solution. Achieving revolutionary improvements in range, speed, altitude, and stealth would dramatically expand operational envelopes, allowing U.S. forces to strike from greater distances with reduced risk and response times. Such advancements could fundamentally alter military doctrine, influencing everything from force posture to strategic planning. The emphasis on improved maneuverability and signature reduction highlights a focus on survivability in highly contested environments, ensuring that these expensive and complex systems can effectively reach their targets.
Furthermore, DARPA’s interest in developing new test and evaluation technologies directly addresses a critical bottleneck in hypersonic development. The extreme conditions of hypersonic flight make testing incredibly challenging and costly, often relying on specialized ground facilities or limited flight test ranges. Streamlining and innovating the testing process could accelerate development cycles, reduce costs, and more quickly transition advanced prototypes into deployable weapons. The multi-platform design approach, envisioning missiles launchable from fighters, bombers, and ground systems, also signals a desire for widespread integration and tactical flexibility across all military branches, maximizing the strategic impact of these advanced weapons. This continuous innovation in hypersonics is a key component of the broader competition among major global powers, directly impacting future military balance and international stability.