The World’s Smallest Helicopter - GEN H-4

GEN H-4 is the world's smallest co-axial helicopter ever made.This is a Japanese designed and manufactured ultralight one-man helicopter. The total empty weight of this helicopter is only 155 lbs. Smallest helicopter in the world has two rotors turning in opposite directions to maintain stability, and four engines that enables a 30-minute flight with a top speed of about 56 miles per hour.