YouTube - Smallest Helicopter (GEN H4)
Max. Cruise Speed:
4 x 125 cc 2C
4 x 10 h.p. ea.
13 ft. 1 in.
6,500 feet (est.)
The Smallest Helicopter, recognized by the Guinness Book of Records, with a rotor diameter of 13 feet 1 inch and an empty weight of 155 lbs. is the GEN H4.
The origins of the Smallest Helicopter can be traced all the way back to when, in fourth century China, children played with a toy whose principle would be used hundreds of years later. It would bring a new dimension to the science of flight. It was a simple round stick with feathers mounted on top, with each feather twisted slightly so that it struck the air at an angle when the stick was spun. The results was a device that had enough lift to fly up into the air.
On November 13, 1907, Paul Cornu, a Frenchman, made the first free, untethered, manned helicopter flight. It lasted about 30 seconds at a height of just about 12 inches off the ground.
Early pioneers of helicopter flight had to overcome a number of challenges before successful flight could be achieved. It wasn't until 1936 that the Germans produced the first fully controllable helicopter.
Today, helicopters are the most versatile vehicles to take to the sky. They are an indispensable tool of modern aviation. The Smallest Helicopter GEN H4 is one of the latest achievements in helicopter evolution.
The prototype, looking much as it appears today, was first shown to the public in 1997. Since that time a number of flights have been successfully completed.
Controls are relatively simple. Rotor speed will make the helicopter climb and descend. Moving the control stick will result in the helicopter flying in that direction.
The GEN H4 has four engines. Should one fail, the others are intended to provide sufficient control to land the helicopter safely.
Safety concerns have been raised regarding the Smallest Helicopter GEN H4 's lack of auto rotation, under one hour endurance with five gallon fuel capacity, and lack of quick control responses due to fixed pitched rotor blades.
It appears that a total of seven prototypes were sold.
The Intelli Nano Heli has a 3 in. diameter rotor and is 2.5 in. high.
The Black Hornet by Proxy Dynamics rotor diameter is about 3.8 in. Weight is .7 oz including a camera. It is being offered for government applications and is not for sale to the public.