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3240 x 4148 pixels
27.4 x 35.1 cm ⏐ 10.8 x 13.8 in (300dpi)
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Henri Giffard (1825-1882) was a French engineer. He invented the injector and the Giffard dirigible, an airship powered with a steam engine, and weighing over 400 pounds. It was the world's first passenger airship. Both practical and steerable, the hydrogen-filled airship was equipped with a steam engine that drove a propeller. The exhaust steam was mixed in with the combustion gases and it was hoped by these means to stop sparks rising up to the gas bag. He also installed a vertical rudder. On September 24, 1852 he made the first powered and controlled flight traveling over 16 miles from Paris to Trappes. He was able to make turns and circles, proving that a powered airship could be steered and controlled. He was granted a patent for the injector in 1858. His is one of the 72 names of scientists inscribed on the Eiffel Tower.
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