Portal:Ohio/On this day.../April 28
(1919) Leslie Irvin tested the first military free-fall parachute when he jumped from a de Havilland DH-9 biplane flying at 100 mph while 1,500 feet (460 m) over McCook Field in Dayton, Ohio.
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(1919) Leslie Irvin tested the first military free-fall parachute when he jumped from a de Havilland DH-9 biplane flying at 100 mph while 1,500 feet (460 m) over McCook Field in Dayton, Ohio.