时速160千米的自行车

Now Minneapolis-based inventor Rich Kronfield has created an electric-assist “Raht Racer” velomobile that he claims can travel at up to 100mph （160km/h）.

“The Raht Racer is a power biking vehicle that uses state of the art pedal-electric hybrid technology to amplify pedal power， enabling the rider’s legs to propel the vehicle up to highway speeds， giving the rider the feeling of super strength，” Mr Kronfield says. “On a bicycle， your pedals are the accelerator. Same with the Raht Racer， only multiplied a hundred times.”

The Raht Racer’s pedals are connected to a unique fly-wheel generator rather than of directly driving the wheels， as in a traditional velomobile.

The pedals power a 20-kwh electric motor， which sits in the rear wheel hub.

The vehicle senses the torque being applied to the pedals， and then amplifies it so that most people can maintain a cruising speed of around 30 mph （48 km/h）.

The body of the two-seater Raht Racer is made from carbon fiber and includes a roll cage， headlights， seat lights， air bags and a trunk.

During pedalling， a 2-kwh li-ion battery pack also gets charged to help extend the 570lb （259kg） velomobiles range.

Mr Kronfield has created a prototype and is currently running a Kickstarter campaign to create a commercial mode.

It is estimated that the price of the Raht Racer will start at $35，000 （217，300） if the campaign is successful.

居住在美国明尼阿波里斯市的发明家里奇・科伦菲尔德研制了电动“拉特赛车”人力躺车，声称其速度每小时能高达100英里（即每小时160千米）。

“拉特赛车是一种动力自行车，使用脚踏电动混合技术来增强脚踏的动力，骑行者的腿能够驱动自行车使其达到在高速公路上行驶的速度，让骑车人感受到超强力量，”科伦菲尔德如是说，“骑自行车时，踏板是加速器，拉特赛车也一样，只不过拉特赛车的动力是其他自行车的百倍。”

拉特赛车的脚踏板与一个独特的飞轮发电机连接，而不是像传统自行车一样直接驱动车轮。

拉特赛车的脚踏板为处于后轮毂的一个20千瓦的电动机提供动力。

这种装置能检测到脚踏板上的扭矩，大幅提高了它的作用，使得大多数人都能维持每小时30英里（即每小时48千米）左右的行驶速度。

两人座的拉特赛车主体由碳素纤维制成，设有一个笼形护框、车头灯、座位灯、气囊和一个后备厢。

踩踏的同时还能为一个2千瓦时的锂离子电池组充电，延长重达570磅（即259千克）的躺车在道路上行驶的时间。

科伦菲尔德已创造出了一个模型，目前正在美国Kickstarter众筹网上开展筹款活动以便进行生产。

如果这个项目成功的话，拉特赛车的售价预计将超过3.5万美金（约合21.73万人民币）一台。