RC Helicopters
Posted by Altamira
RC Helicopters
George Cayley, who, as a young boy, had been fascinated by the Chinese top, built his earliest vertical-flight model, a twin-rotor rc helicopters model in 1792 and described it in On Aerial Navigation in 1796. It was very similar to Launoy and Beinvenu’s model. By the end of the 18th century, he had constructed several successful vertical-flight models with rotors made of sheets of tin and driven by wound-up clock springs. In a scientific paper published in 1843, Cayley described a relatively large vertical flight aircraft design that he called an Aerial Carriage. However, his device remained only an idea because the only engines available at the time were steam engines, which were much too heavy for successful flight.
The lack of a suitable engine stifled aeronautical progress, but the use of miniature lightweight steam engines met with limited success. In 1842, the Englishman W.H. Phillips constructed a steam-driven vertical flight machine that ejected steam generated by a miniature boiler out of its blade tips. Although impractical to build at full-scale, Phillips’ machine marked the first time that a model electric rc helicopters had flown powered by an engine rather than by stored energy devices such as wound-up springs. He exhibited his model at the Crystal Palace in London in 1868.
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