Author Topic: China launchers Q&A  (Read 49663 times)

Online Satori

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China launchers Q&A
« on: 12/09/2010 10:08 AM »
A new Q&A thread for the Chinese launchers.

I'm searching for information about the CZ-2D Chang Zheng-2D launch vehicle. The CGWIC gives some figures about this launcher but other sites give other distinctive numbers.

Does anyone has some trustworthy numbers for the CZ-2D vheicle characteristics?

Thanks!
« Last Edit: 12/23/2010 07:55 PM by Satori »

Offline powerplay2009

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Re: China launchers Q&A
« Reply #1 on: 12/09/2010 01:17 PM »
There are two many parameters. Tell me which are the main parameters of your interest. I can dig it out for you.

Online Satori

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Re: China launchers Q&A
« Reply #2 on: 12/09/2010 01:41 PM »
There are two many parameters. Tell me which are the main parameters of your interest. I can dig it out for you.

The main parameters I have for the CZ-2D are the following. Are they correct?
                                       Stage 1  Stage 2 Vernier engines
Dimeter (m)                3,35   3,35   
Stage length (m)                27,910   10,9   
Mass (kg)                192.700   39.550   
Propolent mass (kg)   183.200   35.550   
Propolent   N2O4/UDMH   N2O4/UDMH   N2O4/UDMH
Engine                             YF-20B   YF-23   4 x YF-25
Força (kN)                2.961,6   742,04   47,1
Specific impulse (m/s)   289   297   282
Spf impulse (sea level) (s)   259   260   260
Burn time (s)                170   295   ???

Mass (kg)      232.250   
Lenth (m)      41,056   
Fairing diameter (m)   3,35   
Fairing length (m)      6,983   
Payload capacity SSO (kg)   1.300   

There is also a streched version of the CZ-2D. What are the main differences?

Online Salo

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Re: China launchers Q&A
« Reply #3 on: 12/09/2010 04:32 PM »
http://www.sinodefence.com/space/launcher/changzheng2.asp
Quote
The CZ-2D is a two-stage, liquid-propellant launch vehicle designed mainly for Low Earth Orbit (LEO) missions, with an LEO payload of 3,700kg. A total of 10 launches were carried out between 1992 and 2008, all from the Jiuquan Satellite Launch Centre.

The CZ-2D is generally carries UDMH/N2O4 for all stages. The first stage uses a YF-21B motor consisting of four 65,000kg-thrust YF-20 chambers motors with swinging nozzles. The second stage has a YF-24F rocket motor consisting of one 75,000kg-thrust YF-22B main motor with fixed nozzles, and a YF-23F swivelling venire motor with four chambers motors that produce a total thrust of 4,700kg. The launcher also features a McDonnell Douglas (now Boeing Aerospace) PAM-D upper stage providing 66,700 lb of thrust.

The ChangZheng 2D is available in two versions: Type A with a 2.90m-diameter fairing and Type B with a 3.35m-diameter fairing.

Online Salo

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Online Salo

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Offline Yarrah

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Re: China launchers Q&A
« Reply #6 on: 12/09/2010 05:57 PM »
Great thread. I have two questions:

1. Is it true that from now on all comsats launched by China will be launched on a CZ 3B/E rocket?

2. Does anyone have any specific information on the CZ 4C's third stage? Like number of chambers, thrust, burn time & lsp? And what are the main differences with the CZ 4B's third stage?
« Last Edit: 12/09/2010 07:56 PM by Yarrah »

Offline Yarrah

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Re: China launchers Q&A
« Reply #7 on: 12/09/2010 06:03 PM »
About the CZ 2D, CGWIC says it has a YF-21C engine on the first stage and YF-24C on the second stage, Sinodefence says YF-21B on the first stage and YF-24F on the second stage. Which one is right?

Online Salo

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Re: China launchers Q&A
« Reply #8 on: 12/09/2010 07:42 PM »
2. Does anyone have any specific information on the CZ 4C's third stage? Like number of chambers, thrust, burn time & lsp? And what are the main differences with the CZ 4B's third stage?
http://danielmarin.blogspot.com/2010/11/lanzamiento-cz-4c-feng-yun-3b.html
http://danielmarin.blogspot.com/2010/08/lanzamiento-cz-4c-yaogan-10.html
http://www.b14643.de/Spacerockets_1/China/CZ-4/Description/Frame.htm
« Last Edit: 12/09/2010 07:46 PM by Salo »

Offline powerplay2009

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Re: China launchers Q&A
« Reply #9 on: 12/10/2010 02:28 AM »
Satori, you are right. And there is no third stage. But there is one module called ETS,
radius       0.99m
Propolent    HTPB
Engine        SRM
length         1.5m
Force          2744 (N*s/kg)

Offline osiossim

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Re: China launchers Q&A
« Reply #10 on: 12/10/2010 09:15 AM »
About the CZ 2D, CGWIC says it has a YF-21C engine on the first stage and YF-24C on the second stage, Sinodefence says YF-21B on the first stage and YF-24F on the second stage. Which one is right?

CGWIC announcement is right.

Online Satori

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Re: China launchers Q&A
« Reply #11 on: 12/10/2010 06:38 PM »
I'm looking for CZ-2E images, mainly any images related to the January 25, 1995 Apstar-2 launch failure.

Thanks!

Online Satori

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Re: China launchers Q&A
« Reply #12 on: 12/11/2010 05:28 PM »
I'm looking for CZ-2E images, mainly any images related to the January 25, 1995 Apstar-2 launch failure.

Thanks!

Found this videos on YouTube... I think that on the second video we can see the CZ-2E (Y1) launch pad abort on March 22, 1992; the January 26th, 1995 CZ-2E (Y6) rocket crash; and the St. Valentins massacre on February 14th, 1996 with the CZ-3B (Y1) launch vehicle.



« Last Edit: 12/11/2010 05:40 PM by Satori »

Online Satori

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Re: China launchers Q&A
« Reply #13 on: 12/12/2010 05:13 PM »
Is it possible to identify when this two CZ-2C were launched?

Offline go4mars

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Re: China launchers Q&A
« Reply #14 on: 12/24/2010 05:04 AM »
http://www.astronautix.com/lvs/ur700m.htm

Zhang Guitian (Apparently a Chinese "acamedician") was talking at a conference in 2006 referring to Chinese plans to build something on the scale the UR-700M.

Does anyone know more about this/able to verify/dispel it?  Or know where it was discussed on another thread?

Thanks. 
Elasmotherium; hurlyburly Doggerlandic Jentilak steeds insouciantly gallop in viridescent taiga, eluding deluginal Burckle's abyssal excavation.

Offline limen4

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Re: China launchers Q&A
« Reply #15 on: 01/03/2011 07:48 PM »
Is it possible to identify when this two CZ-2C were launched?

Rui, not a definitive identification of the launches. But I found some images which maybe give some hints.
The first image shows maybe the second truck which transports the first stage. A launch vehicle number is seen - Y802302 (?).
The second image is from a philatelic cover which commemorates the first commercial piggyback payload. The brown smoke plume at the first stage seems to correspond with those of the very left image in the launch sequence.
Finally an image from the August 1988 launch.
« Last Edit: 01/03/2011 07:55 PM by limen4 »

Offline panzmead

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CZ-3( ) third stage insulation
« Reply #16 on: 01/14/2011 09:05 PM »
All,

would anyone be able to share any information regarding the (assumed) foam insulation of the cryogenic CZ-3(A thru C) third stage?  Of interest is (a) is it bonded on foam, ala the Ariane 1-4 third stages, or sprayed on foam, ala the Delta IV stages, (b) is it exposed or covered with MLI (as on some Centaur stages), (c) are there any good photos of the foam, perhaps during application, finishing, painting (?), etc., and (d) are there published or known designation(s) and physical characteristics, principally the mass density, of the foam?

If my supposition of foam is incorrect, clarification would be welcome.

Any information is most appreciated,

Phillip Anz-Meador

Offline Stan Black

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Re: China launchers Q&A
« Reply #17 on: 09/06/2011 06:59 PM »
 Are the Chinese rockets still manufactured in two locations; SAST still look after the CZ-4 and CZ-2D? What about the engines. And who makes what for the CZ-3 rockets as both CALT and SAST are involved?

http://www.cgwic.com/Partner/index.html
http://www.globalsecurity.org/wmd/world/china/sast.htm
http://www.globalsecurity.org/wmd/world/china/calt.htm

Offline Liss

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Re: China launchers Q&A
« Reply #18 on: 09/09/2011 07:28 PM »
Stan,
CALT (Beijing) designed and produced CZ-3 third stage (LOX/LH2) while SAST used to build first and second stages.
This message reflects my personal opinion based on open sources of information.

Offline Liss

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Re: China launchers Q&A
« Reply #19 on: 09/09/2011 07:58 PM »
Finally an image from the August 1988 launch.
limen4, that is not the picture of the 1988 launch.
In the 05 Aug 1988 launch the spacecraft was of a Jianbing-1A type, i.e. a longer cylindro-conical one, such as in a well-known 1992 launch with Freja. But in the picture we see a typical conical Jianbing-1.
I've found seven other images of the launch in question (more than any other!) but I still don't know which launch it was.
This message reflects my personal opinion based on open sources of information.

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