Here is another question on CZ-2C.....
Quote from: limen4 on 01/03/2011 07:48 PMFinally 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.
Finally an image from the August 1988 launch.
The November 1974 failure is the known source of controversy :-)CALT is known to attribute it to CZ-2 and all launches since 1975 to CZ-2C while CASC lists CZ-2C launches from 1982 only -- which makes more sense in my opinion even if the 1982 version differs from 1974/75 only in uprated engines.I believe Stan Black's list inherits from a long http://www.9ifly.cn/thread-407-1-1.html topic at the Chinese forum www.9ifly.cn. Several CZ-3 numbers are still educated guess AFAIK but others has been confirmed by Chinese sources and documents. Short and full numbers are known for some vehicles -- for example, Sven Granh's FSW-14 was launched by CZ-2C number Y903210 or Y10 for short, and the Y802302 = Y2 vehicle pictured above was intended for 19 Aug 1983 launch.By the way, we known the Long March 3 name since 1979 but when exactly Long March 1 and Long March 2 names were announced? When did it become known for sure that FB-1 and CZ-2 both existed? I found that both CZ-2 and CZ-2C names were known by January 1986 but when exactly CZ-2C was identified as the two-stage vehicle used in certain FSW launches?
In 1978, the Long March II rocket, based on adaptive technologies through improved design, developed a new launch vehicle - the Long March II C. Rockets for about 40 meters, the satellite fairing diameter 3.35 m, take-off mass 245 tons, carrying capacity of near-Earth orbit 2.5 to 3.9 t.
The launch of the "Long March II C" carrier rocket length 41.9 m, take-off mass 245 tons.
Yet the difference from the Iridium version is easibly visible in photos at the same Taiyuan pad:(upper -- 08 Dec 1997) (lower -- 11 Apr 2007)
Found a mention of the 245 ton version...
Quote from: Liss on 09/10/2011 02:36 PMFound a mention of the 245 ton version...Interestingly, Google gives the following results:+"长征二号丙" +"213吨" (CZ-2C/213t) 2207 results+"长征二号丙" +"233吨" (CZ-2C/233t) 0 result+"长征二号丙" +"245吨" (CZ-2C/245t) 416 resultsI am wondering if 233t is not a typo for 213t in the CGWIC litterature CALT has a table for an improved version (长征二号丙改进型运载火箭)with a mass of 213 thttp://www.calt.com/cpyfw/yzhj/cp/2009123015071136e9f8.html
And the CZ-2D is 250thttp://www.spacechina.com/cpyfw_yhxt_yzhj_Details.shtml?recno=60472
Lift-off Mass (t) 2961.6kN
QuoteYet the difference from the Iridium version is easibly visible in photos at the same Taiyuan pad:(upper -- 08 Dec 1997) (lower -- 11 Apr 2007)From the pictures above, I'd said that the shroud and second stage are identical but the first stage is some 2.5 meters longer (and have fins of course). 2.5 meters layer of propellant is some 26 tons of load. Adding tankage mass and fins we'd probably have 2 more tons. Seems to be generally compatible with total mass increase of 213 to 245 tons rather than to 233 tons. More detailed image of the newest vehicle may provide for more accurate estimate.
I think so.The 172 and 55 ton fuel loads are compatible with durations of engine burns for SJ-11-03 launch which are barely visible in launch center photos.Stage lengths are beyond repair :-)
Quote from: Liss on 09/11/2011 10:34 AMI think so.The 172 and 55 ton fuel loads are compatible with durations of engine burns for SJ-11-03 launch which are barely visible in launch center photos.Stage lengths are beyond repair :-)Found a break down of lengths for the CZ-4Ahttp://www.space.cetin.net.cn/docs/ht9902/ht990206.htm