May 11 – Tragedy strikes as the United States NavydirigibleUSS Akron (ZRS-4) attempts to land in front of thousands of spectators at Camp Kearny in San Diego, California, after a 77-hour flight from Naval Air Station Lakehurst, New Jersey, when Akron suddenly lurches upward, surprising the sailors handling her lines. Four men cling to a line as Akron rises; one falls from a height of 15 feet (4.6 meters) and survives with a broken arm, but two others fall to their deaths from altitudes of between 100 and 200 feet (30 and 61 meters). Dangling 200 feet (61 meters) below Akron, the fourth man, Seaman Apprentice C. M. "Bud" Cowart, is carried out to sea at an altitude of 2,000 feet (610 meters) and finally is reeled aboard Akron after two hours on the rope. The events are captured on film.
August 14 — Alexei M. Cheremukhin, co-designer (with Boris Yuriev) of the Soviet TsAGI 1-EA pioneering single lift rotor helicopter, takes the 1-EA to an unofficial record altitude for helicopters of the era, of 605 meters (1,985 ft).
^Donald, David, ed., The Complete Encyclopedia of World Aircraft, New York: Barnes & Noble Books, 1997, ISBN 0-7607-0592-5, p. 186.
^Crosby, Francis, The Complete Guide to Fighters & Bombers of the World: An Illustrated History of the World 's Greatest Military Aircraft, From the Pioneering Days of Air Fighting in World War I Through the Jet Fighters and Stealth Bombers of the Present Day, London: Hermes House, 2006, ISBN 9781846810008, p. 32.
^Peattie, Mark R., Sunburst: The Rise of Japanese Naval Air Power 1909-1941, Annapolis, Maryland: Naval Institute Press, 2001, ISBN 1-55750-432-6, p. 50.
^Mondey, David, ed., The Complete Illustrated History of the World 's Aircraft, Secaucus, New Jersey: Chartwell Books, Inc., 1978, ISBN 0-89009-771-2, p. 34.