The machine was designed while Leonardo da Vinci was under the patronage of Ludovico Sforza in 1487.Sometimes described as a prototype of modern tanks, Leonardo's armoured vehicle represented a conical cover inspired by a turtle's shell. The covering was to be made of wood and reinforced with metal plates that add to the thickness. Slanting angles would deflect enemy fire. The machine was powered by two large inside cranks operated by four strong men. The vehicle was equipped with an array of light cannons, placed around the perimeter.
For the Cannon, you can print it one by one with the file"Cannon.stl"(total 12 pieces).
Anyway, you can print them all in one take with the file "Cannon x12".
The roof of the car is detachable in order to demonstrate the details inside.