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The Kopp–Etchells effect is a sparkling ring or disk that is sometimes produced by rotary-wing aircraft when operating in sandy conditions, particularly near the ground at night. The name was coined by photographer Michael Yon to honor two soldiers who were killed in combat; Benjamin Kopp, a US Army Ranger, and Joseph Etchells, a British soldier.
This is a timeline of aviation history, and a list of more detailed aviation timelines. The texts in the diagram are clickable links to articles. The texts in the diagram are clickable links to articles.
On 11 December 1951, the Kaman K-225 became the first turbine-powered helicopter in the world. Two years later, on 26 March 1954, a modified Navy HTK-1, another Kaman helicopter, became the first twin-turbine helicopter to fly. [97] However, it was the Sud Aviation Alouette II that would become the first helicopter to be produced with a turbine ...
On January 29, 2025, a United States Army Sikorsky UH-60 Black Hawk helicopter collided mid-air with American Airlines Flight 5342 (operated by PSA Airlines as American Eagle), [a] a Bombardier CRJ700 airliner, over the Potomac River, about half a mile (800 m) short of runway 33 at Ronald Reagan Washington National Airport in Arlington, Virginia.
The newest helicopters are a heavy-duty complement to Cal Fire’s fleet of 34-year-old UH-1H Super Huey helicopters, also military surplus. The Fire Hawks are able to dump more than two-and-a ...
The history of aviation spans over two millennia, from the earliest innovations like kites and attempts at tower jumping to supersonic and hypersonic flight in powered, heavier-than-air jet aircraft. Kite flying in China, dating back several hundred years BC, is considered the earliest example of man-made flight. [ 1 ]
Here is a timeline of what we know so far, including new, exclusive videos obtained by CNN: ... the Black Hawk helicopter, flying under the call sign PAT 2-5, to confirm it sees American Airlines ...
You may notice an increase in military aircraft flying over Miami-Dade County in the upcoming days, but fear not: There is no need to panic. A Department of Defense exercise from Jan. 24-25 will ...