|
|
#29
25-05-05, 02:31
|
||||
|
||||
The 25pdr - supergun
Hello Norm,
All artillery shells make a noise as they pass through the air. This is caused by the driving band at the base of the shell. The driving band is made of a soft alloy, usually brass, and it engages the rifling in the barrel and seals the gasses in the chamber. The driving band and rifling also imparts the spin to the shell which serves to stabilize it in flight. After leaving the barrel the driving band is left damaged by the rifling, and that produces the noise. On guns like the 25pdr and the American and German 105’s, you can adjust the amount of propellant. In the 25pdr there were four charge bags. The muzzle velocities were as followers: Charge 1 - 200m/sec Charge 2 - 300m/sec Charge 3 - 450m/sec Supercharge - 520m/sec In the 105mm C1 that I worked on there were seven charge bags. The best feature of the 25pdr was its barrel design. The gun was heavy for its size, but its barrel life was unmatched by any other gun. It could be fired until its barrel starts to glow red. Then the crew would quench it with water and start firing it again. No other gun could stand up to that type of punishment. John 
|
|
|
Threaded Mode