CZ-NGLV

China National Space Administration * China Academy of Launch Vehicle Technology (CALT)

A new CZ-5 series is being planned using modular stages. Boosters of various capabilities would be assembled from three modular stages of 2.25 m, 3.35 m and 5.0 m diameter. The new generation launch vehicle will be based on the 120 t thrust LOX/Kerosene core engines known as YF-100, and the 50 t thrust LOX/LH2 engine known as YF-77. The development of these engines began in 2000 and 2001 respectively, and they were successfully tested in 2005. Compared to the UDMH/N2O4 engine used by the current Chang Zheng family, the new generation engines have much lower poisoning gas emission as well as better reliability.

The CZ-5-2.25 small launcher would use the 2.25 m diameter core and a  upper stage of the same diameter. Payload is estimated as around 1.8 tons to low earth orbit or 1.3 tons to a sun-synchronous polar orbit.
The CZ-5-3.35 medium launcher would use the 3.35 m diameter core with four 2.25 m diameter core stages as strap-ons (or not) and a upper stage. Payload is calculated as much as 12 tons to low earth orbit or 5 to 7 tons to geosynchronous transfer orbit. Two upper stages are powered by two Kerosene/LOX engines as well as the cryogenic upper stage from the CZ-3A.
The CZ-5-5.0 heavy launcher would use the 5.0 m core stage together with a number of modular 2.25 m or 3.35 m diameter stages as strap-ons.  Lower payloads could be achieved by using 2 x 2.25 m plus 2 x 3.35 m strap-on stages; 4 x 2.25 m strap-on stages, or two of either stage. For GTO missions a cryogenic upper stage with engine YF-75D is added. Maximum payload with four 3.35 m diameter strap-ons is given as 23 tons to low earth orbit or 11 tons to geosynchronous transfer orbit.

New LH2/LOX engine YF-77 for next generation Chinese launch vehicles: Designer: China Academy of Aerospace Liquid Propulsion Technology. Thrust (s.l.): 542 kN  Thrust (vac): 692.6 kN.  Isp (s.l.): 335 sec. Isp (vac): 428 sec.  Chambers: 1. Oxidizer to Fuel Ratio: 5.45. Flow rate: 165 kg/sec

China starts to design new medium and small launch vehicles
China will start a further new Project on its next-generation of Chang Zheng (CZ) rockets – medium and small launch vehicles CZ-7 and CZ-6.
Chinese CZ series has launch vehicles for lifting weight less than 5 metric tons, lifting weight between 5 and 10 metric tons, and lifting weight around 20 metric tons (the on-going CZ-5), but not launch weight between 10 and 20 metric tons.

The CZ-7 aims to close the gap. The launcher will replace the Changzheng 2F currently in use for the human spaceflight missions. The first launch of the booster is expected to take place in 2014.

The CZ-6 is a liquid-propellant, small-load launch vehicle, currently being developed by the Shanghai Academy of Spaceflight Technology (SAST). The launch vehicle is designed to send at least 500kg payload into the sun-synchronous orbit (SSO) of 700km.
The launch vehicle is based on a 3.35m diameter core stage, which has been developed as a strap-on booster for the CZ-5 family a which consists of a single 120t-thrust YF-100 rocket engine. The second stage uses a single 15t-thrust YF-115 engine. Both engines burn an oxygen and kerosene (LOX/Kerosene) propellant. The third stage is 2.25m in diameter and consists of four 1kN-thrust rocket motors.