The gas engine’s humble beginnings date back to 12th-century China when the cannon was invented. Already having produced gunpowder, a weapon was not a surprising use of their new explosive. The cannon worked well and was built in many sizes and configurations. But all had two things in common: a barrel and a projectile.
Many years went by but eventually thought was given to peaceful and useful adaptations. The barrel could become a cylinder and the cannon ball a piston. So the inventors went to work to construct some mechanism to make a piston go back and forth and connect to make
