Jolly Green II combat SAR helicopter taken to extremes

An HH-60W Jolly Green II, the U.S. Air Force’s new combat search-and-rescue helicopter, has completed a month-long trial of extremes inside the McKinley Climatic Lab. The Sikorsky test aircraft endured real temperatures ranging from 120 F to -60 F as well as 45 mile-per-hour winds coupled with heavy rainfall. All of those scenarios were created within the lab’s 55,000-square-foot test chamber.

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