Tsar Tank developed by the Russians during the First World War. The armored vehicle is considered to be an utter engineering failure due to its numerous design flaws.
https://s3-us-west-1.amazonaws.com/h..._tsar_tank.jpg
Previously:
https://www.homemadetools.net/forum/...309#post158002
https://www.homemadetools.net/forum/...664#post147710
https://www.homemadetools.net/forum/...598#post143269