Wheeler Army Airfield the first transpacific flight from California in 1927; the great Dole Air Race from California to Hawaii; the first transpacific flight from the U.S. to Australia in 1928, and the first Hawaii-to-Mainland solo flight in 1935 by Amelia Earhart. Ms. Earhart visited Wheeler Field in 1935 in her Lockheed Vega and in 1937 in her Lockheed Model 10 Electra. Kingsford Smith, in his plane, the "Southern Cross", also used the airfield on his historic flights across the Pacific. By 1940, Wheeler Field had evolved into a primary base for Army Air Corps pursuit (i.e., "fighter") aircraft such as the P-40
Amelia Earhart engine and altitude settings for the Electra. One of the recommended schedules was: Earhart used part of the above schedule for the Oakland to Honolulu leg of the first world flight attempt. Johnson estimated that 900 gallons of fuel would provide 40% more range than required for that leg. Using 900 gallons was 250 gallons less than the Electra's maximum fuel tank capacity; that meant a weight savings of , so Earhart included Mantz as a passenger on that leg. The Oakland to Honolulu leg had Earhart, Noonan, Manning, and Mantz on board. The flight from Oakland to Honolulu took