The concept of vertical flight captured imaginations for centuries. Sketches of helicopter-like flying machines date back to Leonardo da Vinci in the 15th century.
In the 18th century, Mikhail Lomonosov even built a small, coaxial model powered by a spring mechanism.
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Emile Berliner: Early helicopter experiments with counter-rotating rotors.
Breguet brothers: Advanced helicopter designs with control systems.
Igor Sikorsky's Breakthrough (1939): Ukrainian-born American aviation pioneer Igor Sikorsky is credited with developing the first practical helicopter, the VS-300.
VS-300's success opened doors for further helicopter development, leading to the diverse helicopters we see today.