Hydrogen can also serve as fuel for internal combustion engines, but unlike with fuel cells, will produce tailpipe emissions and is less efficient. Learn more about fuel cells. The energy in 2.2 pounds (1 kilogram) of hydrogen gas contains about the same as the energy in 1 gallon of gasoline. Because hydrogen has a low volumetric energy density, additional steps are needed to store enough hydrogen onboard fuel cell vehicles to achieve the driving range of conventional vehicles.
Wiktionary (0.00 / 0 votes) Rate this definition: zeppelin (Noun) A type of large German dirigible airship of the early 20th century designed to carry passengers or bombs. Zeppelin (ProperNoun) A German manufacturing company, famed for building the zeppelin airships. Origin: Named after Ferdinand, Count von Zeppelin.
Count Ferdinand von Zeppelin was the inventor of the rigid airship, or dirigible balloon. He was born July 8, 1838, in Konstanz, Prussia, and educated at the Ludwigsburg Military Academy and the University of Tuebingen. tÃ¼bingenerdinand von Zeppelin spent nearly a decade developing the dirigible. The first of many rigid dirigibles, called zeppelins in his honor, was completed in 1900. He made the first directed flight on July 2, 1900. In 1910, a zeppelin provided the first commercial air service for passengers.