Early dirigible developments included machine-powered propulsion ( Henri Giffard, 1852 ), rigid frames ( David Schwarz, 1896 ), and improved speed and maneuverability ( Alberto Santos-Dumont, 1901 )
Early dirigible developments included machine-powered propulsion ( Henri Giffard, 1852 ), rigid frames ( David Schwarz, 1896 ), and improved speed and maneuverability ( Alberto Santos-Dumont, 1901 )
0.003 seconds.