EzyCopter by Yoshine

New Coaxial Helicopter to Fulfill the Dream of Personal Flight of the 21st  Century

During the first 100 years of aircraft development since 1903, fixed-wing aircraft has received all the attention by most historians. However it is the helicopter flight that was the first flight vehicle envisioned by man.

The ancient Chinese played with a hand-spun toy that rose upward when revolved rapidly that marks the first ancient concept of helicopter flight.

Figure 1 Chinese ZHU-QING-TING

The word "Helicopter" is derived from ancient Greek terms "helix" (spiral) and "pteron" (wing).

Rotary aircraft attracted the earliest attentions of one of the great figures in the dawn of flight, Leonardo da Vinci.  In 1490 Leonardo da Vinci was the first to put down on paper a design for a man powered spiral winged device that resembled the modern helicopter.

The explanation for his keen interest is simple. For ages man has wished not merely to fly but to be able to lift himself vertically from the earth and set himself down again without forward run. This is exactly what a helicopter is designed to do with the power-driven rotor or rotors, and thereby the "rotary-wing" family of aircraft emerged.

Figure 2 Leonard DE VINCI’s