What Is LUCAS US Loitering Munition Makes Combat Debut against Iran in Operation Epic Fury.

U.S. forces have deployed the LUCAS loitering munition, built by SpektreWork, and designated by the manufacturer as FLM 136, during Operation Epic Fury, targeting Iranian military infrastructure. The move signals a deeper shift toward domestically produced, attritable unmanned strike capabilities that can operate in contested airspace without risking manned aircraft.

U.S. forces have fielded the LUCAS loitering munition, manufactured domestically by the U.S. Company SpektreWorks and designated by the manufacturer as FLM 136, during Operation Epic Fury to enhance long-range precision strike options against Iranian military infrastructure. The loitering munition’s operational debut underscores the United States’ growing emphasis on attritable unmanned strike platforms designed to penetrate layered air defenses while limiting exposure of manned aircraft in one of the most heavily defended regions in the Middle East. By relying on U.S.-produced loitering munitions with modular payload flexibility and extended loiter capability, commanders gain a scalable tool for time-sensitive targeting without committing high-value crewed assets.
Follow Army Recognition on Google News at this link

The U.S.-manufactured LUCAS FLM 136 loitering munition is a long-range, six-hour-endurance unmanned strike drone built by SpektreWorks, capable of carrying an 18 kg (40 lb) payload over 350 nautical miles (648 km) to conduct precision one-way attacks against air defenses, missile launchers, and hardened military targets. (Picture source: U.S. Department of War)

Operation Epic Fury, launched jointly by the United States and Israel in late February 2026, is designed to degrade Iran’s integrated air defense systems, ballistic missile forces, and command and control architecture. The campaign integrates stealth aircraft, stand-off cruise missiles, electronic warfare, and unmanned systems in synchronized strike cycles aimed at fracturing Tehran’s defensive depth. Within this framework, the FLM 136 LUCAS serves as a persistent loiter-and-strike asset capable of identifying, tracking, and engaging time-sensitive targets deep inside defended territory while compressing the sensor-to-shooter chain.

The operational groundwork for LUCAS employment in the region predates Epic Fury. On December 16, 2025, a Low-cost Unmanned Combat Attack System successfully launched from the flight deck of the Independence-class littoral combat ship USS Santa Barbara (LCS 32) while operating in the Arabian Gulf. The drone was operated by U.S. Naval Forces Central Command’s Task Force 59. He served with Task Force Scorpion Strike, a one-way attack-drone squadron deployed to the Middle East to enhance regional security and deterrence. That maritime launch demonstration confirmed the platform’s flexibility for sea-based operations and its compatibility with distributed naval strike concepts, directly informing its subsequent employment in the current campaign.

The platform, known operationally as LUCAS, is commercially designated FLM 136 by SpektreWorks, an Arizona-based U.S. defense company specializing in unmanned combat systems. The aircraft measures 3 meters (9.8 ft) in length with a wingspan of 2.5 meters (8.2 ft). It has an empty weight of 31.75 kilograms (70 lb) and a maximum takeoff weight of 81.5 kilograms (180 lb), allowing for significant fuel carriage and modular payload integration within a compact, transportable airframe.

According to manufacturer performance data, the FLM 136 offers approximately 6 hours of endurance, powered by a 215 cc carbureted engine. Cruise speed is rated at 102 km/h (55 knots), with a dash speed of 185 km/h (100 knots) for rapid repositioning or terminal attack. The operational ceiling exceeds 3,000 meters density altitude (10,000 ft DA), placing it above the engagement envelope of some short-range air defense systems while remaining below traditional medium-altitude UAV bands. Under unrestricted command and control conditions, the platform has a published range of 350 nautical miles, equivalent to approximately 648 kilometers (403 miles), confirming its classification as a long-range loitering system capable of deep-strike from standoff launch points.

Launch is conducted via a pneumatic rail system or rocket-assisted takeoff, eliminating the need for runways and enabling deployment from austere forward positions or naval decks. The system is described as fully autonomous from takeoff to landing, with a landing distance of approximately 30.5 meters (100 ft) in recoverable configurations. SpektreWorks emphasizes an open payload architecture and small operational footprint, allowing rapid reconfiguration for strike, surveillance, or threat-emulation roles.

In strike configuration, the FLM 136 can carry a maximum payload of 18 kilograms (40 lb). This payload class supports high-explosive fragmentation or shaped-charge warheads capable of neutralizing radar arrays, mobile surface-to-air missile launchers, ballistic missile transporter erector launchers, fuel depots, and reinforced command facilities. During terminal engagement, the aircraft transitions from loiter to a steep dive profile, combining explosive yield with kinetic energy to maximize structural penetration and destructive effect against hardened or relocatable military targets.

Within Operation Epic Fury, LUCAS has been employed to suppress and attrit Iranian air defense nodes that complicate manned air operations. Its six-hour loiter window enables persistent surveillance over suspected missile deployment corridors, allowing operators to wait for identification before committing to strike. This flexibility is critical against mobile systems that can relocate between traditional strike cycles. Compared to high-cost stand-off cruise missiles, the FLM 136's lower unit cost enables sustained operational tempo without rapidly depleting strategic munition stockpiles.

Operationally, the LUCAS loitering munition strengthens distributed lethality by providing commanders with a deep-strike option extending beyond traditional artillery and tactical aviation ranges. It's nearly 650-kilometer (350 nautical mile) reach under controlled conditions, which places critical infrastructure at risk from outside heavily defended airspace. At the same time, autonomous navigation and inertial backup systems mitigate the impact of electronic warfare interference.

Strategically, the integration of the SpektreWorks-built FLM 136 into Epic Fury illustrates a broader evolution in U.S. strike doctrine. Rather than relying exclusively on high-end aircraft and expensive cruise missiles, the Pentagon is increasingly incorporating scalable, domestically manufactured loitering munitions capable of imposing persistent pressure over time. By combining six-hour endurance, modular payload capacity of 18 kilograms (40 lb), autonomous flight capability, and extended operational reach approaching 650 kilometers (350 nautical miles), LUCAS represents a structurally different approach to deep precision strike.

As Epic Fury continues, the battlefield performance of the FLM 136 LUCAS will serve as a key indicator of how effectively long-range loitering munitions can complement traditional airpower in high-intensity state-on-state conflict. Its deployment from both land-based launchers and naval platforms such as USS Santa Barbara demonstrates the system’s adaptability across domains, reinforcing its role in shaping the future architecture of U.S. distributed strike operations.

Written by Alain Servaes – Chief Editor, Army Recognition Group
Alain Servaes is a former infantry non-commissioned officer and the founder of Army Recognition. With over 20 years in defense journalism, he provides expert analysis on military equipment, NATO operations, and the global defense industry.