Long March 3 Chronology (Part 3): The heavy-lifters

The Long March 3B is the second variant of the Long March 3A family, designed to deliver a single heavy communications satellite or multiple satellites to GTO. With four strap-on liquid boosters, the launch vehicle’s payload capacity was increased to 5,200 kg (5,500 kg on later variants) to GTO, making it (at the time of its introduction) the most powerful space launch vehicle in China, and the second most capable in the world, only after the Russian Proton.

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