O cano

Marshall Brain

The barrel of a gun flint became a technological marvel, especially at that time. A blacksmith pounded a piece of flat iron to give cylindrical shape around a mandrel ( long stick diameter suited to what you want turning). Heating the iron in a forge to a certain temperature, the blacksmith caldeava groove along the length of the pipe to form a strong tube. This process could take days. The pipes varied from the length of a gun (15 to 30 cm) to the length of a big gun (102 152 cm).

The blacksmith could go inside the barrel finish with a flat cylinder or rifled barrel . A smooth cylinder is exactly that: a smooth rod tip to tip. The Brown Bess in the American Revolutionary War was "Smooth Soul", as well as any shotgun. It is made ​​by sticking the tube with successively larger drills and then polishing it with a mandrel.

Raiar the barrel is a way to increase the accuracy of the projectile, whether spherical or conical. To dawn a pipe, you start with a plain cylinder, burilando spiral grooves inside the barrel. A common design is the curved rays at 122 cm in the length of the pipe. When the projectile is fired through the barrel, it fits in the rays, coming in a quick rotation (between 1000 and 3000 RPM) and flying at speeds ranging from 305-600 meters per second.

It can be seen rays spiral cut in the upper

Once the barrel was rifled or smoothed, one end is closed with a lock breech . After that, a small hole is made ​​to allow the flame of the cartridge between the flintlock and light load.