The 75-kilogram helicopter will make a demonstration flight in the city of Vinci, near Florence, on May 25, according to Japanese developer Gennai Yanagisawa, 75.

• 据75岁的日本研发者平贺柳泽介绍，这架重75公斤的直升机将于本月25日在佛罗伦萨附近的达芬奇市进行试飞。