This group is for everyone who likes all kinds of ancient, roman, medieval, renaissance, and other old weapons and units from the past.
Leonardo da Vinci's proposed concept of a Tank which is propelled by two men powering crank shafts. It was once constructed in a BBC documentary by a military team and one of the gears was changed in order to make the machine work. It has bee suggested that Leonardo left this error in the design on purpose to prevent unauthorized people from using it.
I just noticed something...
The one they built is a lot taller than this one! o.O
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