Ukraine's Hrim-17 Pulsejet Engine Could Revolutionize Lightweight Combat Drones

Ukrainian engineers have unveiled the Hrim-17, a new pulsejet engine built for lightweight drones. The system was presented at the Brave1 defence exhibition on December 3. Its developers claim it could transform how unmanned aerial vehicles (UAVs) operate in combat and reconnaissance roles. The engine was designed by Nezalezhne Konstruktor'ske Byuro and remains in the prototype stage. It measures 940 mm long with a 100 mm diameter and weighs 1,980 grams. During operation, its casing can reach temperatures of 800°C, while noise levels exceed 140 decibels.

The Hrim-17 runs on F100-grade gasoline, consuming about 6.3 litres per hour at 90% thrust. It delivers thrust ranging from 2.5 kg to 7 kg, though standard use caps at 6.3 kg. With an energy draw of 48 watts, the engine can function continuously for 15 minutes.

A complete kit includes the engine itself, a launch valve, an automated fuel system, and a ground ignition unit. The design allows adaptation for different drone types, from high-speed loitering munitions to reconnaissance UAVs. The Hrim-17 marks a step toward scalable jet-powered drone technology in Ukraine. Its compact size and adaptability could expand the capabilities of unmanned systems on the battlefield. Further testing and development will determine its final operational role.