Dynamics and design ofanovel aerodynamically efficient motorcycle

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Filed Under (Tips and Review) by admin on 01-12-2010

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Airflow around the ES1-rider combination. The computed aerodynamic drag-area coefficient with the rider in the prone position is C d A=0.16 m2; (B) Airflow around a Yamaha R1-rider combination. The computed aerodynamic drag-area coefficient with the rider in the prone position is C d A=0.35 m2. Dynamics and design ofanovel aerodynamically efficient motorcycle 2 In order to facilitate this aerodynamically efficient posture, a number of design changes had to be made to the rider’sseatingposition, to the front and rear suspensions as well as the drivetrain[1]. Amass reduction is attained using a frameless construction in which the suspension components are attached directly to the engine. The new rear drivetrain is illustrated in figure (2). Fig. 2: Novel drivetrain and rear suspension that allows the rider to move his/her feet out of the airstream thereby reducing the machines drag. The new front suspension is shown in figure (3), which allows the rider’storsotoremain out of the airstream. This new low-dive front suspension arrangement also allows for improved engine cooling and compact packaging. Fig. 3: Novel front suspension system that facilitates reduced drag, improved engine cooling and enhanced rider comfort. By reducing aerodynamic drag the ES1 not only provides a design upgrade towards a fuel efficient vehicle, but it also tackles fundamental issues in motorcycle racing. Hence, due toits broad implications to the motorcycle industry, the development and study of the ES1′sdynamicsand design will attracta broad audience since it promises to representa crucial step in the development of the motorcycle

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