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HOW ITS MADE: Helicopters

HOW ITS MADE: Helicopters The helicopter is classified as a rotorcraft. It uses rotors to provide the thrust and lift required for flight. The unique feature of this helicopter is that it can take off and land vertically. It can also hover, fly forward, backward and sideways. The idea of vertical flight has existed since 400 BC when Chinese toys made of bamboo imitated the flight of modern helicopters. In the 1480s, Leonardo da Vinci designed a machine on paper that he thought could fly vertically. The first combat helicopter, named Focke-Wulf Fw 61, was built in 1936. The first helicopter to go into full production was a helicopter designed by Igor Sikorsky in 1942. Nowadays, helicopters are used for transportation, military, entertainment and fire fighting, as well as rescue and medical emergency transportation. Hey guys, welcome back to the channel, How It’s Made. Before jumping into the video, if you are new here, please consider subscribing to our channel. Also, hit the bell icon to get a notification whenever we upload a new video! That said, let’s begin! An Overview of Helicopter French engineer Paul Cornu designed and built a helicopter, which was successfully launched in 1907-officially making it the world's first manned helicopter. Its characteristic is that the two rotor blades rotate in opposite directions, which cancels out the torque. It is powered by a 24 horsepower engine, must be fixed in place by people on the ground, and cannot be manipulated at all, so all in all, it did not achieve great success. Another French engineer, Etienne Oehmichen, designed a helicopter with a vertically installed rotor that rotates in the opposite direction to that of a large lifting rotor. Later he also developed the tail rotor. His first helicopter success was in November 1922. Oehmichen No. 2 made history because it was successfully used to transport people. In April of the following year, Oehmichen flew 360 meters and 525 meters, setting records. In May 1924, a closed-circuit helicopter flew about 1 kilometre in 7 minutes and 40 seconds. In the same year, he flew a helicopter with two passengers. Although Oehmichen’s helicopter design was quite successful, the Focke-Wolf Fw 61 is generally considered the world’s first truly practical helicopter. It first flew in 1936 and was designed and developed by two Germans Henrich Focke and pilot Gerd Achgelis. The frame of the aircraft is based on another Focke-Wulf Fw 44 co-designed by Focke, which utilizes licensed rotor technology and relies on radial engines to drive twin rotors. A breakthrough is the reverse rotation of the rotor because this solves the problem of torque reaction. It also has a small horizontal axis propeller driven by the engine, which cools the engine when the helicopter is hovering or flying at low speeds. The second prototype was built in 1937, and the final aircraft went one step further, successfully performing an autorotation landing without having to turn on the engine. The making of Airplane Selection of Material and Costing Weight reduction is a key consideration in the selection of helicopter materials. Composite materials are widely used and account for a high percentage of the total weight of helicopters, especially in military helicopters. But for some parts, metal materials are still engineers' first choice; in key issues such as cost and reliability, metal has an absolute advantage. Helicopter manufacturers have long recognized the benefits of applying composite materials to important aircraft components. In today's military rotorcraft, composite materials usually account for 50% to 80% (or even higher) of the fuselage weight. However, helicopters manufactured for the civil aviation field differ greatly in the application of composite materials. Some manufacturers vigorously learn from their experience in military rotorcraft and use a large number of composite materials. Other manufacturers only use composite materials for specialized or non-structural components or only use composite materials when the use of metal becomes infeasible or costly. The differences can be partly attributed to differences in experience and manufacturing concepts. However, some manufacturers are reluctant to expand the application of composite materials in rotorcraft because the Federal Aviation Administration (FAA) recently revised the certification rules, which require more and more stringent composite materials, resulting in Costs are rising, and R&D budgets for commercial applications are relatively limited, causing an excessive burden. The History of Rotor Blades In early aircraft manufacturing, the wings were made of wood and fabric. Under the technical conditions at the time, these materials have been serving in the aviation industry for many years. #howitsmade #helicopter #factory