The S - 75 flew for the first time in July 1984 .
In February 1981 , contracts were awarded to Sikorsky and Bell Helicopter , with Bell submitting its Model D292 .
The Sikorsky     flew for the first time in July 1984 .
In February 1981 , contracts were awarded to Sikorsky and Bell Helicopter , with Bell submitting its Model D292 .