Recently, Chinese aerospace company Dawn Aerospace unveiled the WG-1 Dawn-1, a medium-sized reusable liquid-propellant launch vehicle. This groundbreaking rocket has captured global attention as the world's first to integrate three core technologies: a full-flow staged combustion cycle engine system, carbon fiber composite construction, and liquid oxygen-methane propulsion. Notably, it also represents China's first fully carbon-fiber rocket.
In the Dawn-1's design, carbon fiber composites feature extensively in critical components including rocket sections, fuel tanks, fairings, and structural supports. By combining thermoplastic and thermoset carbon fiber placement with continuous fiber 3D printing technology, the rocket achieves maximized weight reduction-enhancing payload capacity. Additionally, its engine incorporates metal 3D printing, improving manufacturing reliability while further cutting mass. Such weight optimization proves crucial for modern high-performance rockets, particularly for upper stages requiring increased equipment and cargo capacity.
While carbon fiber composites have seen successful applications in foreign liquid rockets like Rocket Lab's Electron, Firefly's Alpha, and Europe's Ariane 6, Dawn Aerospace's breakthrough remains significant. Using modified high-performance cryogenic epoxy resin and advanced carbon fiber materials, the company has manufactured 1.4-meter and 3.35-meter diameter carbon fiber tanks. These have passed rigorous cryogenic testing, demonstrating superior performance in liquid oxygen compatibility, cryogenic sealing, and boil-off rates.
This achievement marks a major stride in China's development of carbon fiber composite rocket technology, paving the way for more efficient and cost-effective space exploration.
