طراحي، ساخت و كنترل يك مدل خودرو بادي ايرفويلي

DESIGN, FABRICATION AND CONTROL OF A RIGID-WING LAND YACHT MODEL

This paper presents the design, fabrication and control of a rigid-wing land yacht. The design of this model, which has been fabricaied for the first time in the coun­try, is guided by theory. In general, wind energy pro­vides thrust force for land yachts. Some land yachts use rigid wing instead of soft sail. This wing would generate the main aerodynamic forces that would support and propel the land yacht in a special direction. By adjust­ing the wing in a proper direction, the land yacht could be moved in a different direction to the wind, even in the opposite direction to the wind. This land yacht is a radio control model that uses two electrical engines for the wing and the steering control mechanism. These two electrical engines are controlled with a four channel radio controller. Regarding the results of present calcu­lations, it is possible to design any size of rigid wing land yacht without any trial and error, as well as reducing the cost of the experiments, which provide the dimensions and dynamic characteristics of the land yachts. Dynam­ical tests of this model, which are easier than full scale model testing, show that, at true wind speeds of around 10 rn/s, the maximum speed of the land yacht exceeds true wind speed by 75%. Also, at the starting point of the movement, at constant true wind speed, the thrust force will have its maximum value when the true wind angle is ecpial to 90°.