How far is the flight distance of the helicopter?

Helicopters have different ranges because of different tonnage and oil load. Generally, the helicopter lasts for 2-4 hours. If calculated at a speed of 250 kilometers per hour, they can fly 500- 1000 kilometers with full fuel. But this is a theoretical value. Helicopters are usually used as short-distance tools, and the distance used is usually no more than three or four hundred kilometers.

The farthest helicopter: "Indian Pony" is the nickname of the U.S. Army light observation helicopter internal machine 0H-6A. Helicopter 1966 set 23 world records in March and April. The distance of a straight flight reached 356 1.55km, which has been maintained ever since. This helicopter can fly farther than other helicopters, mainly because of its light weight and big belly. Its own weight is only 557 kg, but its oil load is as high as 590 kg.