A 50 N-class valveless pulsejet engine has been indigenously designed, developed, and successfully tested at CSIR-NAL for use in target drone applications. This compact propulsion system operates on the pulsejet principle, which utilizes intermittent combustion to produce thrust, eliminating the need for moving parts such as valves, thereby simplifying the design and improving reliability.

The engine has undergone comprehensive testing using a variety of liquid fuels, including Jet-A (aviation kerosene), Methanol, Petrol, and Diesel, as well as gaseous fuels like Hydrogen (H₂) and Liquefied Petroleum Gas (LPG). These tests demonstrate the engine's versatility and adaptability to different fuel types, which is critical for field deployment in varied environments and logistical conditions.

The development of this pulsejet engine supports indigenous capabilities in drone propulsion systems, reducing reliance on imported technologies and enabling rapid customisation for various unmanned aerial vehicle (UAV) platforms in the defence and research sectors.