Wuxi supplier's grid fin steers rocket back to Earth

Jiangsu Sinchao Metals Tech workers inspect their product. [Photo/Wuxi Daily]

A Wuxi-based manufacturer has emerged as a key player in China's commercial space sector after its precision-engineered grid fins guided the Zhuque-3 rocket's first stage back to a designated landing site on Aug 19 with a successful outcome.

The component, developed by Jiangsu Sinchao Metals Tech, functions as an aerodynamic steering wheel during the first stage's reentry into the atmosphere. After stage separation at an altitude of several dozen kilometers, the grid fins deploy and adjust their angle to control pitch, roll and yaw, enabling the booster to glide and decelerate before touching down at the target location with precision.

This was not the product's first flight. The grid fin had already been carried on Zhuque-3's maiden launch in December last year. Between the two missions, the Sinchao team refined the design based on real-world data collected during the first return, making targeted improvements to the grid structure, weld joint fatigue performance, and overall dimensional consistency.

Following the successful recovery, the grid fin's main structure remained intact. "After routine inspection and maintenance, the product can be reinstalled for another mission," said Wang Qinrui, the company's operations director. That durability is central to the economics of reusability: the first stage alone carries nine engines, and recovering it could significantly reduce launch costs.

Market confidence is already reflected in the company's order book, which is filled through the end of December. As the commercial space sector continues to expand, aerospace work now accounts for about 50 percent of Sinchao's business, and several other major launch vehicle manufacturers, including Deep Blue Aerospace, have expressed interest in collaboration.

The company is currently adding equipment and tooling with plans to introduce robotic automation to boost production capacity while maintaining consistent quality.