KB Nezalezhne

KB Nezalezhne (the “Independent” Design Bureau) is a private Ukrainian engineering team developing pulsejet propulsion for light unmanned aircraft and interceptor drones. Its first product, the Hrim-17 pulsejet engine, was unveiled at the Brave1 Components exhibition in Kyiv in early December 2025, where it was undergoing ground tests. The engine measures about 940 mm long and 100 mm across, weighs just under 2 kg, and is built from stainless steel with an aluminium fairing. The bureau quotes a thrust range of roughly 2.5 to 7 kg — about 6.3 kg at a typical 90 percent setting — running on F100-grade petrol at some 6.3 litres an hour, drawing only 48 watts from a 12-volt supply. It cites about 15 minutes of continuous operation, a total service life near three hours, a casing that can reach 800 °C, and a noise signature above 140 decibels.

The team puts the engine’s range at up to 100 km and its target speed at 450 km/h, with a price under $800 that it says covers the engine, ten replacement valves, an automatic fuel system, and a ground ignition system.

Having completed the engine, the bureau moved on to an airframe of its own: the Myt-2, a fixed-wing UAV it positions as an interceptor against Shahed-type loitering munitions. The drone first flew with a conventional electric motor, and the team is now integrating the Hrim-17 — a stage it describes as among the most demanding in the project.

KB Nezalezhne is one of several Ukrainian teams that surfaced domestic pulsejet designs in late 2025, alongside Scopa Industries and First Parsec , as the country works to reduce its dependence on imported small jet engines for strike and interceptor drones.