what is the advantages/disadvantages of smoothbore, rifle & polygonal barrel 4 rifle?


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idain
October 3, 2006, 11:38 PM
greeting all users..
i need another helps..
i would like to know what is the disadvantages/disadvantages of
1) polygonal
2) smoothbore
3) rifle

in my thesis i need to design new rifle system for small people xspecially for South East Asia people which:
1) light
2) less maintainance need
3) can shoot accurate
4) easy to manufacture

what is the best rifle that i can make as referrence?
thanx..

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rockstar.esq
October 4, 2006, 01:14 AM
First of all I belive you mean "thesis"

Smoothbore offers the least chamber pressure of all the options you've listed. Shotgun's are the most common smooth bores. The primary purpose of a shotgun is as a short range weapon that fires a cluster of pellets to maximize the potential of hitting the target. Although shotguns can be used to fire a single projectile, the maximum range is approximately 100yds and the accuracy is fairly poor. Smoothbore's are the easiest to manufacture of the three. Cleaning and maintainence are very easy with smoothbores.

Rifled barrels have the highest chamber pressure due to the rifling cutting into the projectile and forcing it to rotate as it travels down the barrel. This system is capable of impressive accuracy however it has the fastest wear of the three types you've listed. The wear is directly proportional to the cartridge being fired. In most cases, a rifled barrel will remain accurate for a considerable length of time. Rifled barrels are the most difficult to clean and maintain of the three you've listed. However they are the absolute most common type of barrel on firearms in general.

Polygonal rifling is not "cut" rifling in the traditional sense. Polygonal rifling offers less chamber pressure than cut rifling which allows the barrel to last longer. Additionally there are some who claim that polygonal rifling lasts longer due to the lower resistance they have to the bullets passage. Polygonally rifled barrels are common on a number of handguns however they are rare in shoulder fired weapons. Accuracy seems quite comprable to cut rifling.

Matt-man
October 4, 2006, 01:16 AM
Wikipedia, dude.

http://en.wikipedia.org/wiki/Rifle
http://en.wikipedia.org/wiki/Rifling
http://en.wikipedia.org/wiki/Polygonal_rifling

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