Charles Eagan (1921 – March 11, 2010) was a Canadian scientist working in cold weather physiology, known primarily for advancing the wind chill formula.
While conducting research for the U.S. Air Force in Fairbanks, Alaska in 1964, Eagan recognized it would be more accurate if the equation took into account the fact people normally walk outdoors and don't spend a great deal of time at a standstill or in a windless environment.
[1][2] Eagan served with the air force as a radio operator in Gander, Newfoundland and Labrador during the Second World War.
In 1959 in Fort Wainwright, Alaska, he worked with the U.S. Air Force Arctic Aeromedical Laboratory to help pilots and crews maximize their effectiveness in cold conditions.
Eagan worked with mountain climbers at 14,300 feet on the flank of Mount McKinley to test their adaptability to altitude and cold.