Passengers are likely to be able to take an air train running among the high-rises of the city to enjoy the views…This is a scenario described on the first China (Shanghai) International Technology Fair. The air train is a technology originated in Europe and the United States. Such a scene might be actualized in Shanghai in a few years. Chen Changgui, Chairman of Air Train International Group, said that Shanghai has three districts that are preliminarily planning the routes for the suspension trains. According to estimation of current passenger flow, a train with four cars is the best option as Chen advised.
The H-Bahn air train project displayed at the above-mentioned fair is operated by Shanghai Air Train Technology Co., Ltd. affiliated to Air Train International Group. As revealed by Bao Zaiyong who is responsible for the project in the company, some Chinese cities including Wenzhou have shown great interest in the project. Wenzhou has started to appraise the feasibility of this project, only one step away from construction. Three districts in Shanghai have also started to do preliminary route planning.
According to Bao Zaiyong, related departments of Yangpu, Changning and Jiading districts have started to discuss about the route planning for the air train project. For example, Changning District has drafted the route which starts from Fengzhuang Station on Metro Line 13, and reaches Terminal 1 of Hongqiao Airport on Metro Line 10 via Songhong Road Station on Metro Line 2; Jiading District has drafted the route which starts from Jiading New City Station on Metro Line 11 and reaches the International Community Station which is currently under planning; Yangpu District is planning a 15-kilometre line along the river, starting from Dalian Road and crossing several functional blocks of Yangpu along Yangshupu Road, with CBD and universities included.
However, as Bao said, current discussions are merely on the technical level and will take quite a long while, “possibly two years” to see the real air train. Bao is fairly conservative about the timing for the air train to make its debut.
If the light rail lifts the road surface up into the air, the air train is to build a “suspension rope” in the air. The train will be suspended under the rail to make the passengers feel like traveling in the air.
As introduced, the wheel dishes of the train will be fastened within the rail beams to provide full safety guarantee while the train is in operation. In Germany, air train has more than 100 years of history. The new suspension system was launched in 1984 and has been running in cities like Dortmund and Dusseldorf without any operating incidents.
Air train is usually composed of two or four cars to meet transportation demand of a medium level. Capacity of each car is 13 tons, i.e., 75 people maximum. If a train has four cars, it means it is capable to carry 300 passengers. The designed speed is 50 kilometers per hour. If the train runs at the speed of 40 kilometers per hour at an interval of 90 seconds, the line will be able to transport 12,000 passengers per hour. “The car has fixed seats and also space for standing. The maximum capacity for a single line can reach 15,000 passengers. A train with four cars is the best option for Shanghai according to the passenger flow of the city. The train can go around with double lines to achieve high operational efficiency,” said Chen Changgui.
The energy consumption of the air train is low while the transportation capacity is medium, suitable in suburbs, new cities and dedicated routes. Considering the sightseeing function, it is also a good option to open a riverside route.
Experts also said there are many examples to follow including air trains running between airport terminals, railway stations, long-distance bus terminals, transportation hubs and large theme parks. Air trains can fill the gap for transportation and sightseeing at the same time depending on urban development and actual demands of different cities. In the aspects of energy efficiency and construction cost, Chen Changgui said each car of the metro consumes 5-6 KwH per kilometer while each car of the air train consumes only 2.4 KwH, half of the former.
As for the engineering cost of the air train, each kilometer costs around RMB120-150 million, including the train, rail, platform and signal control system, similar to tramcars on the ground, but one fifth of the metro, half to one third of the cost of low-speed maglev train.