ST-35 Silent Thunder is a Ukrainian VTOL loitering munition with ~60 min endurance, 30 km operational radius, 3.5 kg warhead, and high-precision TV/IR guidance.

# Athlon Avia ST-35 Silent Thunder – VTOL Loitering Munition UAV

The ST-35 Silent Thunder, developed by Athlon Avia, is a sophisticated VTOL loitering munition designed for high-precision strikes with minimal collateral damage. It employs a multi-rotor launch that transitions to winged cruise, allowing stealthy engagement of camouflaged or protected targets.

Key Features and Capabilities

• VTOL launch and cruise transition: Launched vertically via six lift-propellers, the loitering section then detaches and proceeds horizontally toward the target.

• Mission endurance and range: Capable of up to 60 minutes of flight, with an operational radius of 30 km and combat ceiling up to approximately 1,200 m.

• High-speed performance: Cruises between 120–140 km/h, ensuring timely engagement.

• Precision guidance: Features TV/IR guidance with exceptionally tight accuracy—circular error probable (CEP) under 3 m and a 95% hit probability.

• Effective warhead: Carries up to 3.5 kg of warhead (FAE, HEAT, HEF types), tailored to neutralize high-value assets like radars, depots, and command systems.

• Low observability: Engineered to minimize radar, visual, and acoustic signatures, making it ideal for dense or urban settings.

• Portable deployment: Designed for ease of transport in a rugged case, with light assembly in the field.