Home      GEN H4




Primary Function:
Weight Empty:
Max. Weight:
Rotor Dia:
Fuel Consumption:
Max. Cruise Speed:
First Flight:
4 x 125 cc 2C
4 x 10 h.p. ea.
155 lbs.
440 lbs.
5 gals.
13 ft. 1 in.
5 gph
50 mph
6,500 feet (est.)
50 miles

With a rotor diameter of 13 feet 1 inch and an empty weight of 155 lbs., the GEN H4 is recognized by the Guinness Book of Records as the smallest helicopter.

The origin of the GEN H4 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 French-man, 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 GEN H4 is one of the latest achievements in helicopter evolution.

The GEN H4 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.

GEN H4 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 GEN H4 helicopter'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 GEN H4 helicopters were sold.

Intelli Nano Heli by HobbyTron.

Although there are no scale radio control helicopter models of the GEN H4, if you are looking for a small helicopter, there are many to choose from. Pictured above is the Intelli Nano Heli from Hobb Tron. It has a 3" diameter rotor and is 2.5" high.

Black Hornet by Proxy Dynamics.

Rather than the GEN H4 you may want to check out the Black Hornet heli by Proxy Dynamics. Its rotor diameter is about 3.8". Weight is .7 oz including a camera. It is being offered for government applications and is not for sale to the public.

Picoflyer from Interactive Toy Concepts.

The smallest rc helicopter substitute for the GEN H4 that we have seen to date is the Picoflyer from Interactive Toy Concepts. It has a 2.36" diameter rotor and weighs 3.3 grams.

Micro Dragan Fly.

The Micro Dragan Fly is 6 1/2" long, has a 5 1/4" rotor diameter, and weighs 10 grams. Although not a contender for the smallest helicopter like the GEN H4, it has lots of character.


Rather than the GEN H4, the Falcon-X is 7" long, 3.7" high and has a rotor diameter of 7.4".

Bemay Toy Co. micro heli

Who needs a GEN H4 when you can have the great looking micro heli from Bemay Toy Co., China. Its rotor diameter is just 4.5" and height is 2.4". Weight is 1.6 grams.

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