How do people build helicopters?

In the world, helicopters are used in many fields: passenger transport, goods, military, agriculture .

Helicopters are classified based on propeller operation. It is very convenient because it can take off and land vertically in limited space. However, its transport capacity cannot be compared to that of other fixed-wing aircraft.

Transport helicopter belonging to the world's largest Soviet Mi-26T at Zhukovsky air show.(Photo: Wikipedia).

Currently, helicopters are used in many areas, mainly for light weight transport such as pesticide spraying for a large agricultural area; penetrating deep-lying and remote areas without big routes and airports; Rescue people stuck in rugged and difficult areas; supplying goods to offshore oil rigs; overhead shooting and shooting as well as in military fields .

US Navy Osprey V-22 helicopters with swing-type propellers.(Photo: Wikipedia).

The first helicopter model to fly to the sky was made by two French brothers Louis and Jacque Breuguet, under the technical advice of Professor Charles Richet.

Later, Russian engineer Igor Sikorsky became a pioneer in the helicopter manufacturing industry and brought the first helicopter to operate stably in 1939.

Ka-52 is a twin-rotor helicopter with coaxial lift from the Russian Air Force.(Photo: Wikipedia).

Modern technology makes helicopter production easier and more diverse. However, the stages must still have certain standards.

First, in terms of design, helicopters can be operated thanks to one of two main types of engines on the principle of piston or gas turbine . These motors help the motion rotor system.

Belvedere helicopters with two non-coaxial lift propellers.

Helicopters have a propeller system of 2 to 6 blades attached to a central axis. They often have relatively long lengths and small widths, slow motion makes it easier to control helicopters. To reduce weight, light helicopters now only have two propellers mounted. Materials used to manufacture helicopters are usually made of metal or composite compounds or a combination of both.