Cobra AERO

Cobra AERO is a leading designer and manufacturer of advanced propulsion systems for UAS (unmanned aerial systems). Thanks to our deep expertise in aeronautics and engine design, coupled with our state-of-the-art U.S.-based development facilities, we deliver innovative solutions that meet the demanding performance, efficiency, and reliability requirements of modern civilian and military drone platforms.

We are committed to innovation and to remaining at the forefront of UAS propulsion, and utilize cutting-edge technologies such as additive manufacturing and advanced combustion systems to maximize the performance and durability of our products. Our collaborative approach and carefully-selected strategic partnerships have positioned us as a trusted provider of propulsion solutions for drone OEMs, defense primes, and commercial operators.

Manufacturing Excellence & Quality Focus

Our manufacturing approach combines traditional precision machining with the latest in additive manufacturing technologies. By integrating Power Bed Fusion (PBF) and Direct Metal Laser Sintering, our processes offer a unique set of advantages, including: 

• Complex internal geometries that cannot be achieved with traditional manufacturing
• Reduced part-to-part variability
• Enhanced material properties
• 3-D-printed air-cooled engine cylinders with novel interior lattice structure

Quality is of the utmost priority, and we maintain rigorous standards with all products undergoing a comprehensive suite of testing protocols. These include FAR33 durability profile testing, advanced combustion system validation, and full performance testing across the entire range of operating conditions.

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Advanced propulsion systems for UAS

A33N Propulsion System

Advanced powertrain solution for Group 2 UAS

The A33N is an advanced powertrain solution that has been purpose-built to serve the needs of Group 2 UAS platforms. Featuring a fully-calibrated electronic fuel injection (EFI) system, a low-acoustic signature exhaust system, and a 250W generator, this highly resilient system has passed the FAR33 durability profile, making it ideal for a variety of demanding mission profiles.

The engine’s tuned cylinder has been manufactured with Power Bed Fusion, ensuring low part-to-part variability and improved material properties. With a low-friction crank train and minimally-restrictive exhaust, the system can output the power required for demanding payloads and challenging maneuvers such as aggressive climbing.

A servo-controlled cooling duct allows the A33N to keep within a narrow operating temperature range, resulting in both maximal efficiency and enhanced lifespan.

Thanks to its compact form factor and standard mounting flanges, the A33N propulsion system fits easily within the package envelope of a wide range of UAS engine installations.

A99HF Propulsion System

Heavy fuel & gasoline engine for Group 3 UAS

The A99HF is a high-performance propulsion system engineered for small Group 3 UAS platforms. Designed to operate on both heavy fuel and gasoline, it provides flexibility for military and industrial users.

Available in multiple configurations, the system can be deployed as a traditional internal combustion engine or as part of a parallel hybrid setup that delivers combined engine and electric motor power through a single shaft.

Built for demanding mission profiles, the A99HF delivers up to 5kW of continuous power and integrates a refined combustion system capable of handling multiple fuel types without compromising efficiency.

This makes it ideal for extended endurance operations in harsh environments where fuel availability and performance are critical. The system’s adaptable architecture supports integration with hybrid systems, combining engine and motor power on a single shaft.