Ferdinand von Zeppelin (German general retired), flew, after 25 years of research, an airship of his invention over Lake Constance in Germany.
The balloon 128 feet long, called L21, traveled 6 km in 18 minutes at 400 meters.
Ferdinand von Zeppelin (German general retired), flew, after 25 years of research, an airship of his invention over Lake Constance in Germany.
The balloon 128 feet long, called L21, traveled 6 km in 18 minutes at 400 meters.
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