This page uses content from Wikipedia and is licensed under CC BY-SA.
Long March 5 Y2 transporting to launch site
|Function||Heavy orbital launch vehicle|
|Country of origin||China|
|Height||57 m (187 ft)|
|Diameter||5 m (16 ft)|
|Mass||867,000 kg (1,911,000 lb)|
|Payload to LEO (200 km × 400 km × 42°)||25,000 kg (55,000 lb)|
|Payload to GTO||13,000 kg (29,000 lb)|
|Payload to TLI||8,200 kg (18,100 lb)|
|Launch sites||Wenchang LC-1|
|First flight||3 November 2016|
|Boosters – CZ-5-300|
|Length||27.6 m (91 ft)|
|Diameter||3.35 m (11.0 ft)|
|Gross mass||155,700 kg (343,300 lb)|
|Propellant mass||144,000 kg (317,000 lb)|
|Engines||2 × YF-100|
|Thrust||SL: 2,400 kN (540,000 lbf)
Vac.: 2,680 kN (600,000 lbf)
|Total thrust||9,600 kN (2,200,000 lbf)|
|Specific impulse||SL: 300 seconds (2.9 km/s)
Vac: 335 seconds (3.29 km/s)
|Burn time||180 seconds|
|First stage – CZ-5-500|
|Length||31.7 m (104 ft)|
|Diameter||5 m (16 ft)|
|Gross mass||175,600 kg (387,100 lb)|
|Propellant mass||158,300 kg (349,000 lb)|
|Engines||2 × YF-77|
|Thrust||SL: 1,020 kN (230,000 lbf)
Vac: 1,400 kN (310,000 lbf)
|Specific impulse||SL: 310.2 seconds (3.042 km/s)
Vac: 430 seconds (4.2 km/s)
|Burn time||480 seconds|
|Second stage – CZ-5-HO|
|Length||10.6 m (35 ft)|
|Diameter||5 m (16 ft)|
|Gross mass||22,200 kg (48,900 lb)|
|Propellant mass||17,100 kg (37,700 lb)|
|Engines||2 × YF-75D|
|Thrust||176.52 kN (39,680 lbf)88.26|
|Specific impulse||442 seconds (4.33 km/s)|
|Burn time||700 seconds|
|Third stage – YZ-2(Optional)|
|Diameter||3.8 m (12 ft)|
|Engines||2 x YF-50D|
|Thrust||6.5 kN (1,500 lbf)|
|Specific impulse||316 seconds (3.10 km/s)|
|Burn time||1105 seconds|
Long March 5 (LM-5, CZ-5, or Changzheng 5) is a Chinese heavy lift launch system developed by China Academy of Launch Vehicle Technology (CALT). CZ-5 is the first Chinese vehicle with new design focusing on liquid rocket propellants from the ground up. Currently, two CZ-5 vehicle configurations are planned for different missions, with a maximum payload capacity of ~25,000 kilograms (55,000 lb) to LEO and ~14,000 kilograms (31,000 lb) to GTO. The Long March 5 roughly matches the capabilities of American EELV heavy-class vehicles such as the Delta IV Heavy.
The CZ-5's maiden launch successfully occurred on 3 November 2016, from the Wenchang Spacecraft Launch Center on Hainan island. Its second launch on 2 July 2017 failed due to an engine problem in the first stage.
"The Chinese government approved the development of the rocket in 2007 following two decades of feasibility study. It will be manufactured at a facility in Tianjin, a coastal city near Beijing." In 2008 the first launch of the Long March 5 was projected to "most likely" happen in Wenchang of the southernmost island province of Hainan, "where a new satellite launch center is under construction."
The first CZ-5 rocket to be launched completed production and testing in Tianjin manufacturing facility around 16 August 2016 and shipped to the launch centre on Hainan island shortly after.
The Chief Designer for the CZ-5 rocket was Long Lehao. The main objective for the CZ-5 rocket was to fulfill China's requirement for large payload to LEO and GTO missions for the next 20–30 years. The CZ-5 project was initially announced in February 2001, with initial development slated to begin in 2002 and the first versions of the vehicle to go into service by 2008. However, funding was only finally granted in 2007 as revealed by the developers during the Northeast China exhibition.
On 30 October 2007, construction for the CZ-5 production plant began in the TEDA West area near the Binhai New Area in Tianjin city. Building a completely new production facility that is close to the harbor will solve logistical problems associated with over-land transport of the large-sized rocket to launching centers. Instead, the rockets will be transported by sea from Tianjin to a new launch facility at Wenchang on Hainan Island. The new production facility would have an area totaling more than half a million square meters at the cost of RMB 4500 million (USD 650 million), with the first stage of the construction scheduled to be completed by 2009. When the production facility is completed in 2012, it would be capable of a maximum output of thirty CZ-5s annually. As of July 2012[update], development of the 1,200 kN thrust LOX/kerosene engine was test fired. New photos of CZ-5 and of its tests were released in March 2015.
CZ-5 carrier rocket was shipped from North China's Tianjin port at 20 September 2015 for a rehearsal (some drills carried out in a Wenchang Satellite Launch Center that involves both the carrier rocket and a probe) of a scheduled Chang'e-5 lunar mission planned around 2017. The first test flight was scheduled for 2014 but this has slipped to 2016.
The launch was planned to take place at around 10:00 UTC, however several issues involving an oxygen vent and chilling of the engines were detected during the preparation which caused a delay of nearly 3 hours. The final countdown was interrupted three times due to problems with the flight control computer and the tracking software. The rocket finally launched at 12:43 UTC. Also, according to internet user on the Chinese social media Weibo, a minor problem occurred during flight and the rocket put the YZ-2 upper stage and satellite into an orbit that was less accurate than expected. However, the trajectory was easily corrected with the YZ-2 upper stage and the payload was inserted into the desired orbit.
Its second launch on 2 July 2017 experienced an anomaly in the first stage shortly after launch and was switched to an alternate gentler trajectory however it was declared a failure 45 minutes after launch. The cause of the failure was confirmed by CASC later, related to the anomaly happened on one of the YF-77 engine in the first stage.
The chief designer of CZ-5 is Mr. Li Dong of the China Academy of Launch Vehicle Technology (CALT). The CZ-5 family will include three primary modular core stages of 5.2-m diameter (maximum). The total length is 60.5 metres and the weight at launch is 643 tons, with a thrust of 833.8 tons. Boosters of various capabilities with diameters ranging from 2.25 metres and 3.35 metres would be assembled from three modular core stages and strap-on stages. There would be a choice of engines with different liquid rocket propellants: 1,200 kN thrust LOX/kerosene engines or 500 kN thrust LOX/LH2 engines on first stage and boosters. The upper stage would use improved version of YF-75 engines.
Engine development began in 2000–2001, with testing directed by the China National Space Administration (CNSA) commencing in 2005. Versions of both new engines: YF-100 and YF-77 had been successfully tested by mid-2007.
The CZ-5 series will deliver ~23 tonnes payload to LEO, or ~13 tonnes payload to GTO (geosynchronous transfer orbit). This would replace the CZ-2, CZ-3, and CZ-4 series in service, as well as providing new capabilities not possessed by current Long March rocket family. CZ-5 launch vehicle would consist of a 5.0-m diameter core stage and four 3.35-m diameter strap-on boosters, which would be able to send a ~25 tonne payload to low earth orbit (LEO).
|Boosters||4×CZ-5-300, 2×YF-100||4×CZ-5-300, 2×YF-100|
|First stage||CZ-5-500, 2×YF-77||CZ-5-500, 2×YF-77|
|Second stage||CZ-5-HO, 2×YF-75D||--|
|Third stage (optional)||Yuanzheng-2||--|
|Thrust (at ground)||10565 KN||10565 KN|
|Launch weight||867 t||837 t|
|Height||62 m||53.66 m|
|Payload (LEO 200 km)||--||~25 t|
|Payload (GTO)||~14 t||--|
|Boosters||--||2×CZ-5-200, YF-100||2×CZ-5-200, YF-100; 2×CZ-5-300, 2×YF-100||4×CZ-5-200, YF-100|
|First stage||CZ-5-200, YF-100||CZ-5-300, 2×YF-100||CZ-5-500, 2×YF-77||CZ-5-500, 2×YF-77|
|Second stage||CZ-YF-73, YF-73||CZ-5-KO,||CZ-5-HO, 2×YF-75D||CZ-5-HO, 2×YF-75D|
|Third stage (not used for LEO)||--||CZ-5-HO, YF-75||--||--|
|Thrust (at ground)||134 Mgf (1.34 MN)||720 Mgf (7.2 MN)||824 Mgf (8.24 MN)||584 Mgf (5.84 MN)|
|Launch weight||82 t||420 t||630 t||470 t|
|Height (maximal)||33 m||55 m||58 m||53 m|
|Payload (LEO 200 km)||1.5 t||10 t||20 t||10 t|
|Payload (GTO)||--||6 t||11 t||6 t|
|Flight №||Date (UTC)||Launch site||Upper stage||Payload||Orbit||Result|
|1||3 November 2016
|Wenchang LC-1||YZ-2||Shijian 17||GEO||Success|
|2||2 July 2017
|Wenchang LC-1||None||Shijian 18||GTO||Failure|
|November 2018||Wenchang LC-1||None||Shijian 20||GTO||Planned|
|2019||Wenchang LC-1||None||Chang'e 5, lunar sample return||TLI||Planned|
|Q1, 2019||Wenchang LC-1||None||Tianhe, space station core module||LEO||Planned|
|August 2020||Wenchang LC-1||None||Mars Global Remote Sensing Orbiter and small rover||TMI||Planned|
|2020||Wenchang LC-1||None||Chang'e 6, lunar sample return||TLI||Planned|
|Wikimedia Commons has media related to Long March 5.|
The more capable Long March 5 rocket is expected to help the country achieve its goal of constructing a space station in orbit by the year 2020, as well as play a key role in China's future space exploration aims beyond low-Earth orbit. The rocket's maiden launch is expected to occur in 2014
Chinese Rocket Engine Test a Big Step for Space Station Project