Quantum Cyber N.V. (NASDAQ: QUCY) filed a provisional patent application with the United States Patent and Trademark Office for a Coaxial Dual-Propellant Grain Solid Rocket Motor designed to extend the operational range and mission endurance of unmanned aerial vehicles, according to a company statement.

The motor employs a coaxial architecture that places a high-thrust boost grain concentrically around a lower-thrust sustain grain, separated by a thermal barrier interlayer and transition charge. The design delivers a two-phase thrust profile with an initial boost phase of approximately 3-8 seconds at peak thrust, followed by a sustain phase of 15-45 seconds at reduced thrust.

The system is scalable across outer casing diameters of 30-100mm and integrates with UAV airframes in the 1-15 kg class through a detachable cradle and release latch mechanism. The nozzle assembly incorporates a high-density graphite throat insert rated for pressures of 3.5-5.5 MPa and temperatures exceeding 3,000 K.

The thermal barrier interlayer is composed of silica microspheres in an HTPB matrix with alumina and ceramic fillers, maintaining thermal conductivity below 0.4 W/(m*K) to enable sequential ignition of the two propellant zones while maintaining structural integrity throughout the burn sequence.

Quantum Cyber describes itself as an autonomous defense technology company developing an AI-powered System-of-Systems platform for drone warfare, counter-UAS, and border security applications. The company states the rocket motor is designed as the propulsion layer of its multi-domain technology portfolio.

The filing of a provisional patent application does not guarantee the issuance of a patent, the company noted in its statement.