Shahed 131 vs Shahed 136

The Iranian Shahed 136 and Shahed 131 are one-way attack (OWA) unmanned aerial vehicles engineered for massed saturation strikes. Manufactured by HESA, these delta-wing loitering munitions provide long-range precision fires at a lower cost than traditional cruise missiles. While visually similar, they operate in different echelons dictated by payload capacity, range, and unit cost.

Development and Design

The Shahed 131 derives its architecture from the South African Kentron ARD-10, acquired by Iran in the mid-2000s. It utilizes a lightweight composite airframe powered by a 38-horsepower Serat-1 Wankel engine, derived from the British AR 731. Visually identified by vertical stabilizers extending only above the wingtips, it was developed as a tactical strike asset. The Shahed 136 evolved as a scaled-up derivative. It replaces the Wankel with a 37 kW Mado MD-550 four-cylinder piston engine—a reverse-engineered German Limbach L550E—and adds symmetric vertical stabilizers. Both airframes rely on commercial-grade GNSS paired with an inertial navigation system (INS). Russian-localized versions (Geran-1 and Geran-2) integrate the Kometa-M satellite navigation module to resist electronic warfare (EW) spoofing.

Specifications and Performances

The core differentiator between the platforms is payload-range capacity versus procurement cost. The Shahed 136 carries a 30–50 kg warhead over distances up to 2,500 km, allowing strikes into enemy depth from standoff ranges. This capability dictates a unit cost of approximately $193,000. The Shahed 131 limits payload to 10–20 kg and range to 900 km, but its $20,000 unit cost makes it nearly ten times cheaper. Both platforms cruise at a slow 185 km/h, making them vulnerable to kinetic interception by systems ranging from MiG-29 fighters to Gepard SPAAGs. The 136's heavier MTOW supports specialized warheads, including thermobaric and tungsten-fragmentation variants, whereas the 131 is constrained to lighter high-explosive or shaped charges.

Deployment and usage

Russian forces integrated both munitions into their strike complexes during the Russo-Ukrainian War. The lighter Shahed 131 is routinely deployed in leading swarms to exhaust surface-to-air missile (SAM) interceptors and trigger radar emissions. The heavier Shahed 136 follows in the same strike packages to destroy energy grids and industrial sites. Prior to Ukraine, the Shahed 131 executed the 2019 Abqaiq-Khurais attack against Saudi Aramco facilities. The Shahed 136 saw mass employment during Iran’s April 2024 strikes against Israel and has prompted reverse-engineered clones globally, including the U.S. LUCAS system, which the U.S. Navy tested from the USS Santa Barbara in late 2025.

Conclusion

The Shahed 136 is the superior platform for infrastructure destruction. Its 50 kg warhead—comparable to a 155mm artillery shell—and 2,500 km range allow it to permanently disable hardened targets far beyond the line of contact. The Shahed 131 lacks the explosive mass required for these operational-level strikes. However, at $20,000 per unit, the 131 is the more effective platform for air defense exhaustion. In protracted attrition warfare where the primary objective is to deplete enemy interceptor stockpiles, the 131 forces a harsher cost-imposition ratio on defending forces, relegating the 136 strictly to the role of a heavy effector.