5 Largest Helicopters
It was 1860 when first time the word helicopter was used by a French inventor, who came up with a small, steamed powered model. After 17 years, in 1877, first unmanned helicopter rose to the height of 43 feet triggering the start of an amazing journey of helicopter development.
Here is the list of world’s largest helicopters
Mil V-12 was the largest helicopter the world has ever seen. Soviet Union developed this giant machine in 1960s and only two prototypes were produced before the project was trashed for being too big to be used in practical situation.