Author: senoritazhao

Can a coin balance on its edge on a speeding bullet train? [Copy link] 中文

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sfphoto Post time: 2018-2-12 20:21
You’re not an engineer so you don’t understand the difference between trains rated for 200km/h v ...

You are neither an engineer nor a train driver. You are just copying some explanations made for laymen such as you.

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This post was edited by sfphoto at 2018-2-15 01:58
seneca Post time: 2018-2-13 16:40
Remember China was the first country to crash a high-speed train after operating trains that run a ...

The Wenzhou accident involved FOREIGN-DESIGNED trains, as follows:

The two trains involved were based on technology from Bombardier and Kawasaki. Train CRH1-046B is a variant of the Swedish Bombardier Regina, while the second train CRH2-139E is a derivative of the Japanese E2 Series Shinkansen 'bullet train.'

The train signaling system was also based on FOREIGN technology, as follows:

The signalling technology installed on Chinese 200 to 250 km/h (120 to 160 mph) high speed lines, including the Ningbo–Taizhou–Wenzhou Railway where the accident occurred, is Chinese Train Control System CTCS-2 which is the Chinese version of European Train Control System Level 1. The CTCS-2 system uses the classical technology of track circuits to detect the presence of a train on a piece of track. In addition, CTCS-2 uses both fixed-data balises (track-mounted transponders) and controllable-data balises controlled by a Lineside Electronic Unit (LEU) to transmit essential information and signal instructions from the Train Control Center to trains.


China is now phasing out the decade-old FOREIGN-designed trains in favor of newer CHINESE-designed trains based on the CHINESE “fuxing hao” EMU Standard.

Huawei is now working on CBTC (Communication-Based Train Control) based on 4G/5G telecommunications technology to supplant the old train signaling system which is based on 100-year old track-circuit technology.

Huawei, by the way, is ranked number one as the world’s top vendor of 4G/5G telecommunications equipment.

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sfphoto Post time: 2018-2-15 01:25
The Wenzhou accident involved FOREIGN-DESIGNED trains, as follows:



So we technological leaders should never part with our advanced creations. You Chinese can't handle them. You get chaos, mayhem and catastrophes.

And conversely speaking Chinese-designed rolling stock is unfit to operate in the West. Did you know that the Chinese high-speed trains are no longer in the competition to sell in Britain? The current bidders include Alstom, CAF, Hitachi and Stadler. They have already set up workshops and factories in the U.K. or in Italy (Hitachi) to supply rolling stock to Britain.

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seneca Post time: 2018-2-15 10:02
So we technological leaders should never part with our advanced creations. You Chinese can't h ...

Remember KraussMaffei of Germany building China's first maglev line: The Chiense tried by hook and by crook to obtain the entire technology transferred to them but in the end they had to contend themselves by receiving just the hardware. It has taken China more than ten years to come up with its own designs of maglevs. The Shanghai maglev made by the Germans set the benchmarks, though. To date, not a single accident. Can China replicate?

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seneca Post time: 2018-2-15 10:02
So we technological leaders should never part with our advanced creations. You Chinese can't h ...

I was debunking your last reply to my post about an alleged accident involving Chinese-designed trains running at 350 km/hr vs the foreign-designed trains running at 250 km/hr, to wit:

Remember China was the first country to crash a high-speed train after operating trains that run at 350 klicks an hour, taking the lives of 40 passengers and injuring over a hundred.


The Wenzhou accident involved FOREIGN-designed trains rated at 250km/hr using FOREIGN track-circuit train signaling technology which is also used in commuter trains. But Huawei is already working on CBTC based on its 4G/5G telecommunications technology with Siemens, Alstom, Bombardier, etc. CBTC will eventually supplant the old track-circuit train signaling technology and could have prevented the Wenzhou accident because it does not depend on trackside signaling equipment that was disabled by a lightning strike. In addition, 4G/5G telecommunications networks would have the bandwidth to transmit video surveillance footage to central command centers or incoming trains to detect objects that are blocking the path, something not possible to detect on the old track-circuit technology.


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This post was edited by sfphoto at 2018-2-15 13:36
seneca Post time: 2018-2-15 10:04
Remember KraussMaffei of Germany building China's first maglev line: The Chiense tried by hook and ...

The Shanghai maglev uses German technology which is based on conventional maglev technology invented in the USA. The Japanese maglev is based on low-temperature superconducting maglev technology but the Chinese maglev uses high-temperature superconducting maglev technology. The reason why China decided against the German technology has to do with the high cost of operating conventional maglev because it uses too much electricity. Superconducting maglevs uses much less electricity because the superconducting electromagnets gets magnetized using only a fraction of the electricity required for conventional electromagnets. But the Japanese need to cool their superconductor to low temperatures in order to achieve this effect. The Chinese discovered a different way which does not require cooling the superconductor to a low temperature.

On hindsight, the German refusal to license their conventional maglev technology led the Chinese to invent their own maglev technology which uses superconducting electromagnets just like the Japanese version but does not need cooling to low temperatures unlike the Japanese version. China is the only country in the world to deploy the German maglev technology which has had a hard time finding customers because of its high operating costs. Indeed, the Chinese found that out the hard way AFTER forking billions of dollars to build the largely unprofitable Shanghai maglev line.

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sfphoto Post time: 2018-2-15 12:59
I was debunking your last reply to my post about an alleged accident involving Chinese-designed tr ...



You "debunked" nothing, Deer. I debunked your spunk.

It is typical for you jingoist to claim the laurels that are not by right yours, and to distance yourself from the responsibility that you have in operating a railway line.

Chinas railway history does not lack catastrophic accidents. High-speed trains rely on more advanced safety installations but that does not automatically make them safer. The people need to be up to running them and maintaining the equipment. You are still learning.

The Japanese have operated high-speed trains for 51 years without a single accident due to malfunction, wear and tear or human error. Think about it! Chinese people are far more error-prone than Japanese.

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