The First Man-Carrying Aeroplane Capable of Sustained Free Flight: Langley's Success as a Pioneer in Aviation: From the Smithsonian Report for 1914, Pages 217-222, Publication 2329, 1915

Published in 1915, 'The First Man-Carrying Aeroplane Capable of Sustained Free Flight' by Albert Francis Zahm examines Dr. Samuel Langley's pioneering contributions to aviation. The work details Langley's innovative designs and experiments, including his development of a man-carrying aeroplane capable of sustained flight. Zahm discusses the challenges Langley faced, particularly a significant setback in 1903, and highlights the successful flights of Langley's machine in 1914, emphasizing its historical importance in the evolution of aeronautics.