China test fires ‘world’s largest, most hi-tech solid-fuel rocket engine’

The rocket’s 3.5-metre wide engine can generate 500 tonnes of thrust, according to the China Aerospace Science and Technology Corporation . That is more than four times as powerful as the liquid fuel engine on the Long March 5, the largest launch vehicle in China’s space programme at present.

Chinese space authorities said they had made a number of technological breakthroughs to “massively increase the payload capacity of solid-propellant rockets”. An even larger version of the engine, one that could produce 1,000 tonnes of thrust, is under development, according to the CASC, China’s largest space contractor.

In recent years, China has developed a series of new solid-fuel rockets that can deliver a large number of small satellites to near-Earth orbit within hours. For decades, China’s solid-fuel rocket technology lagged behind that of the West. But in recent years Chinese scientists have achieved a number of technical advances relating to fuel efficiency, flight control and engine reignition technology – putting them on a par with or even surpassing their competitors, according to a study in June by researchers at the Xian Institute of Aerospace Information.

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