Suddenly, a violent shudder ran through the airframe. The tail whipped around to the left, the machine beginning to spin uncontrollably. The torque from the main rotor was overpowering the small tail rotor.
Before his work on helicopters, Sikorsky was a pioneer in fixed-wing aviation. In 1913, while working in Russia, he designed and flew the . This was the world's first four-engine aircraft. captain sikorsky work
The team rolled the machine out onto the frozen grass. Sikorsky climbed into the open cockpit. There was no roof, no doors, just a seat and a control stick. He pulled his leather cap down tight. The engine coughed, sputtered, and then roared to life. The 75-horsepower engine screamed, and the rotor blades began to chop the frigid air— thwup, thwup, thwup . Suddenly, a violent shudder ran through the airframe