A couple of centuries ago
Leonardo Da Vinci invented the hydraulic machine,the boat and he design a flying machine
He invented it but it could not be used.
Leonardo da Vinci invented the bicycle and the helicopter.
In the 1950s the pedal bike had already been invented, and in current production - so it couldn't be invented again. There were several companies (Schwinn is one) that manufactured bikes back then.
He invented a submarine, a flying machine and many useful war tools.
He invented a submarine, a flying machine and many useful war tools.
Leonardo da vinci
Leonardo da Vinci.
he built it in 2048 using the time machine he invented in bc10000
The structure was to be wooden. It is not clear what he intended the wings to be made of.
Leonardo Da Vinci
Leonardo Da Vinci