A flying vehicle that is, basically, a gigantic oval ballon filled with Helium (first Hydrogen was used but it was really dangerous so it was swithed to helium),with a passenger cabin and an engine part attached to it.
A very
interesting flying device that was popular in the beginning of the 20th Century, but
unfortunately, lost its
popularity because it was replaced by planes, which were much faster and safer, and because of the crash of the Hindenburg Zeppelin in the 20's.