I would argue that CRRC Qingdao Sifang's CR450AF is the most aerodynamically beautiful EMU ever designed. Looks like a complete departure from the predecessor CR400AF-AE. The CR450BF appears to be a elongated version of the CRRC Changchun's CR400BF-C series automated EMU.
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I would argue that CRRC Qingdao Sifang's CR450AF is the most aerodynamically beautiful EMU ever designed. Looks like a complete departure from the predecessor CR400AF-AE. The CR450BF appears to be a elongated version of the CRRC Changchun's CR400BF-C series automated EMU.
Zhengzhou lines 7 and 8 also opened today.
11 of the 12 largest metro systems (by system length) in the world are in China, with Moscow at 10th place being the only non-Chinese city in the top 12.
Just wondering what are the economics of the CR450
Does the higher energy efficiency make up for the increased air resistance and track wear?
Are the tracks easily upgradable to accommodate the higher speeds?
How does the acceleration and deceleration compare to maglevs or older trains?
According to this article from January, it's supposed to reduce the Beijing Shanghai travel time to 2.5 hours, how is that possible?
If these aspects are favourable, could it be possible that China gives up on or slows down adoption of maglev?
Does the higher energy efficiency make up for the increased air resistance and track wear?
Are the tracks easily upgradable to accommodate the higher speeds?
How does the acceleration and deceleration compare to maglevs or older trains?
According to this article from January, it's supposed to reduce the Beijing Shanghai travel time to 2.5 hours, how is that possible?
If these aspects are favourable, could it be possible that China gives up on or slows down adoption of maglev?
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According to
03更节能
动车组整车运行阻力降低22%，减重10%。
It is resistence of full trainset being reduced by 22%. It is not necessarily the same thing as energy efficiency improved by 22% although the two are related. We don't know if that 22% reduction of resistence is constant over the whole speed range up to 450km/h. We should also remember that resistence increases nonlinearly with speed increase. But we should expect there is reduction even at the top speed. So overall there should be benifit to cover the increased speed. I don't see how wear increases together with top speed, wear only increases if the acceleration and deceleration increases (harder startup and break), not with cruise speed.
Track itself is not the problem, it is the curve of the track and the bridge being the constraint. If they are constructed for a certain top speed turn, then speed at that section is limited.
China has not decided on maglev yet, not on national level. However, I don't think there is reason to give up on the tech. If there is a stretch where there is no HSR, why not build a maglev especially if that stretch connects major regional hubs where passenger switching is a must.
These photos show a CR450AF (R) and a CR450BF bullet train in Beijing, capital of China, Dec. 29, 2024. A prototype of the CR450 bullet train that will run at 400 kilometers per hour debuted in Beijing on Sunday, said the country's railway operator. The train is capable of running at 450 kilometers per hour in test. [All Photos/Xinhua]
This photo shows the driving cab of the CR450BF bullet train in Beijing, capital of China, Dec. 29, 2024. A prototype of the CR450 bullet train that will run at 400 kilometers per hour debuted in Beijing on Sunday, said the country's railway operator China State Railway Group Co., Ltd. The train is capable of running at 450 kilometers per hour in test. [Photo/Xinhua]
This photo shows an interior view of a carriage of the CR450AF bullet train in Beijing, capital of China, Dec. 29, 2024.
Thess photo show an interior view of a business class carriage of the CR450AF bullet train in Beijing, capital of China, Dec. 29, 2024.
This photo shows a multi-purpose room aboard a carriage of the CR450AF bullet train in Beijing, capital of China, Dec. 29, 2024.
This photo shows a private compartment aboard the CR450BF bullet train in Beijing, capital of China, Dec. 29, 2024.
This photo shows a pulled-down tray table aboard the CR450BF bullet train in Beijing, capital of China, Dec. 29, 2024.
This photo shows an interior view of the economy class carriage of the CR450AF bullet train in Beijing, capital of China, Dec. 29, 2024.
A steward introduces the card commemorating the launch of the new high-speed railway on the bullet train G4798 on the Jining-Datong-Yuanping high-speed railway, Dec. 31, 2024.
The Jining-Datong-Yuanping high-speed railway began operations on Tuesday. The railway line stretches from Jining in Inner Mongolia Autonomous Region through Datong to Yuanping, both in north China's Shanxi Province. (All photos by Xinhua/Li Zhipeng)
A passenger prepares to board the bullet train G4798 on the Jining-Datong-Yuanping high-speed railway at Hohhot East Railway Station in Hohhot, north China's Inner Mongolia Autonomous Region, Dec. 31, 2024.
A passenger puts the luggage in place on the bullet train G4798 on the Jining-Datong-Yuanping high-speed railway, Dec. 31, 2024.
A passenger (C) poses for photos at Hohhot East Railway Station in Hohhot, north China's Inner Mongolia Autonomous Region, Dec. 31, 2024.
Actors perform on the bullet train G4798 on the Jining-Datong-Yuanping high-speed railway, Dec. 31, 2024.
Passengers are seen on the bullet train G4798 on the Jining-Datong-Yuanping high-speed railway, Dec. 31, 2024.
A train conductor communicates with a passenger aboard the bullet train G4408 on the Jining-Datong-Yuanping high-speed railway, Dec. 31, 2024.
The Jining-Datong-Yuanping high-speed railway started operation on Tuesday. The railway line stretches from Jining in Inner Mongolia Autonomous Region through Datong to Yuanping, both in north China's Shanxi Province. (Xinhua/Yang Chenguang)
Train crew members pose for a group photo at the Shuozhou East Railway Station in Shuozhou City, north China's Shanxi Province, Dec. 31, 2024.(Xinhua/Yang Chenguang)
HOHHOT, Dec. 31, 2024 (Xinhua) -- The bullet train G4798/5 runs on a bridge on the Jining-Datong-Yuanping high-speed railway, Dec. 31, 2024.(Photo by Ji Enquan/Zhang Jinjie/Xinhua)
A passenger takes selfies aboard the bullet train G4408 on the Jining-Datong-Yuanping high-speed railway, Dec. 31, 2024.
(Xinhua/Yang Chenguang)
A performance is staged aboard the bullet train G4408 on the Jining-Datong-Yuanping high-speed railway, Dec. 31, 2024.
(Xinhua/Yang Chenguang)