rigid airship

A rigid airship, also known as a zeppelin, is a type of self-propelled lighter-than-air craft. It features a lightweight framework of aluminum-alloy girders covered with fabric, housing multiple separate gas-filled cells. This internal structure allows rigid airships to maintain their shape regardless of whether the gas cells are filled or empty, distinguishing them from nonrigid blimps that rely on gas pressure for their form.123

Rigid airships, like other airships, are equipped with a cigar-shaped balloon filled with a lighter-than-air gas such as hydrogen or helium. They also have a car or gondola for crew and passengers, engines to drive propellers, and rudders for steering. While hydrogen offers greater lifting capacity, its flammability led to many disasters. Helium, though less buoyant, is a much safer alternative.123

Ferdinand, count von Zeppelin, pioneered the development of rigid airships, with his first successful craft, the LZ-1, flying in 1900. These airships, often called zeppelins, were used for military purposes and commercial passenger transport in the early to mid-20th century. However, their decline was hastened by a series of accidents, most notably the Hindenburg disaster in 1937, and advancements in heavier-than-air aircraft.123