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假如,我们将一架螺旋桨飞机,拆下它的发动机,再换上一台功率足够的电动机,于是它就成了一架电动飞机。然后,我们在任意两个城市之间,架起一座笔直的轻型钢轨高架桥。再把电动飞机装些机轮并将其放在轨道上,这样在接通电源后,飞机螺旋桨便能牵引它在轨道上运行。因为飞机机翼产生的升力能够部分地抵消飞机自身的重量,并有效地减小飞机机轮与轨道的摩擦力,因此,飞机可高速地在轨道上前进。通过操纵,在飞机不飞高轨道的前提下,我们可以将飞机的速度设定在每小时400千米。这里,我们将这种交通工具称为“轨机”。上面只是一种假设,真正的轨机需要进行专门设计,以便使它能完全适合在高架桥轨道上高速而安全地运行。轨机在轨道上高速运行时,机轮不能
If, for example, we will be a propeller aircraft, remove its engine, and then replaced with a power enough motor, so it became an electric aircraft. Then, we set up a straight light rail viaduct between any two cities. Then install the electric aircraft and put it on the track, so that the aircraft propeller will be able to pull it on orbit after power is turned on. Because the lift generated by the aircraft’s wings partially counteracts the aircraft’s own weight and effectively reduces the friction between the aircraft’s wheels and the orbit, the aircraft can move forward at high speeds on the orbit. By maneuvering, we can set the speed of the aircraft at 400 kilometers per hour, provided the aircraft does not fly high orbit. Here, we will call this transport "rail . The above is just an assumption that the real rail machine needs to be specifically designed to make it perfectly suitable for high-speed and safe operation on viaduct rails. When the track machine is running at high speed on the track, the wheel can not