On some long-distance zeppelins, engines were powered by a special Blau gas produced by the Zeppelin facility in Friedrichshafen. The combustible Blau gas was formulated to make its weight near that of air, so that its storage and consumption had little effect on the zeppelin's buoyancy. Blau gas was used on the first zeppelin voyage to America, starting in 1929.
On some long-distance zeppelins, engines were powered by a special Blau gas produced by the Zeppelin facility in Friedrichshafen. The combustible Blau gas was formulated to make its weight near that of air, so that its storage and consumption had little effect on the zeppelin's buoyancy. Blau gas was used on the first zeppelin voyage to America, starting in 1929.