The most famous helicopter in the world is the Bell UH-1 Iroquois, which is referred as the "Huey". The Huey was the first one to fly in 1956 serves in front-line service in the U.S. military and the militaries of many nations and will continue to do so for many years to come. It had earned its recognition during the Vietnam War and has been featured in many war movies, including Apocalypse Now and Platoon, as well as in numerous action adventure films.
The Huey has several unique characteristics, including its rounded nose, its twin-bladed rotor, and the loud "whomp whomp" sound it makes in flight. In general it is noisy helicopter since, when in forward flight, the tip of the advancing rotor blade breaks the speed of sound, creating a small sonic boom.
The very first helicopters, such as the Sikorsky R-4 and S-51, were powered by piston engines. The Huey was the first turbine-equipped U.S. helicopter to go into manufacture. The manufacture model HU-1 as an entered service with the 101st Airborne at Fort Lewis, Washington. Even though they were intended for evaluation only, the Army quickly pushed them into operational service.
The helicopter was originally selected the HU-1A, that’s where it had received its name "Huey". The official U.S. Army designation Iroquois (Army helicopters are traditionally given Native American names) was never used for practice. The HU-1B was prepared with revised main rotor blades and could carry up to seven passengers. These versions were reselected UH-1A and UH-1B respectively, in 1962 where as a UH-1C version had followed soon with a more powerful engine.
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