Re: Dissapointed
Posted: Sun Dec 22, 2013 6:43 pm
Yes indeed shaun... the initial blast does provide the power... but when it comes to muzzle velocity .. length makes a difference..and yes... it will also be more accurate ...jarndice wrote:Alpha the speed of a missile down a gun barrel is determined by the charge pushing it, the longer the barrel the more accurate the missile. Think of magnum ammunition in a Colt Police Special (STUBBY), the bullets go everywhere but the power in the bullet is massively increased. Hope this holiday is the best for you old friend. shaun
from WIKIPEDIA
Muzzle velocity is the speed a projectile has at the moment it leaves the muzzle of the gun.[1] Muzzle velocities range from approximately 400 ft/s (120 m/s) to 1,200 ft/s (370 m/s) in black powder muskets,[2] to more than 4,000 ft/s (1,200 m/s)[3] in modern rifles with high-performance cartridges such as the .220 Swift and .204 Ruger, all the way to 5,700 ft/s (1,700 m/s)[4] for tank guns firing kinetic energy penetrator ammunition. The velocity of a projectile is highest at the muzzle and drops off steadily because of air resistance.
In conventional guns, muzzle velocity is determined by the quality (burn speed, expansion) and quantity of the propellant, the mass of the projectile, and the length of the barrel. A slower burning propellant needs a longer barrel to burn completely, but can on the other hand use a heavier projectile.[5] A faster burning propellant may accelerate a lighter projectile to higher speeds if the same amount of propellant is used. In a gun, the pressure resulting from the combustion process is a limiting factor on projectile velocity. A balance between propellant quality and quantity, projectile mass, and barrel length must be found if both safety and optimal performance is to be achieved.
Longer barrels give the propellant force more time to work on propelling the bullet.[5] For this reason longer barrels generally provide higher velocities, everything else being equal. As the bullet moves down the bore, however, the propellant's gas pressure behind it diminishes. Given a long enough barrel, there would eventually be a point at which friction between the bullet and the barrel, and air resistance, would equal the force of the gas pressure behind it, and from that point, the velocity of the bullet would decrease.
In comparison... my T34 shoots by far harder and more accurate than my Sherman ..and reason I really don't care for the King Tiger
Have a good one shaun
ALPHA
...( the way that they are clamping down on bike 'gangs' is bloody outrageous !!)
