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Two more points:

1) about the wider body of the chinese CRH3: there is a video where the vice-head-engineer of the chinese railway ministry (???) Zhang Shuguang boasts on board the newly minted CRH3 on the Beijing-Tianjin line, in front of some Siemens engineers, that the chinese achieved "better parameters" despite the higher air density on the chinese line (than in Germany) and the wider car-body. The scene occurs around 1:41 in:

http://www.youtube.com/watch?v=mWwQsRWtveI

What this means is that clearly they were making modifications to optimize from the very beginning, otherwise one could reason simply the way you did, from the fatter train body (and the thicker air in china) to the implausibility of higher speed.

2) Your reference to the "Planned modifications and research" is a blog discussion in July 2009, about a book that was then already published (by the very Mr. Zhang Shuguang in the video mentioned above). So it is not clear if the modifications and research goals are still "planned", or are already (partially) realized.

by Ariel74 on Thu Feb 25th, 2010 at 03:23:21 PM EST
[ Parent ]
Zhang Shuguang boasts on board the newly minted CRH3

I posted an English-dubbed version of the news clip with the boasting Zhang Shuguang in an earlier diary of mine, though without that particular boasting, here it is:

What this means is that clearly they were making modifications to optimize from the very beginning

Well, without basis in any details, that's a rather far-fetched assumption from what you yourself call boasting. You are assuming extensive modifications in the timespan of a few weeks by engineers without prior experience with these technologies and this speed region. Furthermore, that boasting was on a record run, which doesn't say anything about regular service - limiting top speed in actual service to 340, then 330 km/h is more instructive.

So it is not clear if the modifications and research goals are still "planned", or are already (partially) realized.

The CRH2-350 and CRH3-350 are code-names for the new batches ordered in March and September 2009, to be put in service 2011-12. So no, this is not about stuff already applied in the existing sets, but about on-going research.

*Lunatic*, n.
One whose delusions are out of fashion.

by DoDo on Sat Mar 6th, 2010 at 12:53:25 PM EST
[ Parent ]
You are assuming extensive modifications in the timespan of a few weeks

8½ weeks if counted between the 26 April start of the Beijing-Tianjin test runs and the 24 June record run, 3 months if counted until the opening of the line.

BTW, even in March that year, the design top speed for even the Chinese-built trains was given as:

China-made bullet train to link Beijing, Tianjin in Aug - The Official Website of the Beijing 2008 Olympic Games

The first China-made bullet train designed to run at 300 kilometers per hour has completed a test run and will be in service between Beijing and Tianjin in early August, a railway official said on Sunday.


*Lunatic*, n.
One whose delusions are out of fashion.
by DoDo on Sat Mar 6th, 2010 at 02:20:49 PM EST
[ Parent ]

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