 On July 4, 1930, Ruth Alexander flew a Nicholas-Beazley NB-3 (Barling NB-3) light aircraft (serial number 52, U.S. Department of Commerce registration number 880M) to 21,000 feet; this was not confirmed as an official record owing to problems with the official barograph.Her altitude had exceeded the rating for the barograph drum.On July 11, 1930, Alexander took off at 1