A 1937 U.S. Navy analysis using Lockheed Electra performance charts recalculated the aircraft's fuel endurance at 20 hours and 13 minutes, extending the expected flight time by about 40 minutes compared with the initial U.S. Coast Guard estimate.
July 18, 1937
high
statistical
Performance and endurance recalculation for the Lockheed Electra related to Earhart's planned flight.