Kuaizhou 11 fails in maiden launch

The debut mission of Kuaizhou 11, the newest in China's carrier rocket fleet, failed on Friday, according to its maker.

The rocket blasted off at 12:17 pm from the Jiuquan Satellite Launch Center in northwestern China's Gobi Desert to send two small satellites to two different orbits. During its flight, some abnormalities emerged and resulted in failure, China Aerospace Science and Industry Corp, one of the nation's major space contractors, said in a statement, adding that engineers are investigating the incident.

A Kuaizhou 11 is 25 meters tall with a diameter of 2.2 meters. With a liftoff weight of 78 metric tons, the rocket will be able to place a 1-ton payload into a sun-synchronous orbit at an altitude of 700 kilometers, according to CASIC.

Once the rocket becomes operational, it will be the most powerful solid-propellant carrier rocket in China. Currently, the strongest solid-propellant carrier rocket in the country is Long March 11, which has a length of 20.8 meters, a diameter of 2 meters and a liftoff weight of 58 tons.

In addition to the carrying capacity, the new rocket also features the extensive use of composite materials. More than 90 percent of the rocket is made of composite materials, designers said.

Research and development of Kuaizhou 11 began in 2015 at China Space Sanjiang Group in Hubei province, a CASIC subsidiary specializing in solid-fuel rockets.

Designers planned for it to make its maiden flight in 2017 but the schedule had been repeatedly postponed due to unexpected technical difficulties, the company said.

The biggest obstacle was the rocket's liquid-propellant, attitude-control propulsion system. Designers have been working to develop a new type to replace the one offered by the original supplier. Engineers spent five years designing and testing components and resorted to 3D printing technology before resolving the issue in December.

CASIC began to develop the Kuaizhou series in 2009 as a low-cost, quick-response product for the commercial space market. Kuaizhou is the largest solid-propellant rocket family in China, as opposed to the Long March series that mainly relies on liquid fuel.

zhaolei@chinadaily.com.cn