Shortround6
Major General
One 20mm gun will kill a fighter IF you can get keep the gun on target long enough to get 3-5 hits. Two 20mm guns means you have to have the perfect firing solution for 1/2 the time. Four guns means.........
The Germans found that the average pilot's gunnery ability was such that they needed over 1000 rounds of 20mm ammo fired to kill a bomber.
1000 rounds of ammo weighed about 194kg (not including links) and you needed enough guns to allow the pilot to fire 1000 rounds of ammo in a reasonable number of firing passes of reasonable length. Not 10 different 10 second firing passes at the same target using a single gun. Obviously some compromises needed to made (10 guns are out of the question) and also obviously the 20mm wasn't a good solution no matter what compromise was reached.
The Germans found that the average pilot's gunnery ability was such that they needed over 1000 rounds of 20mm ammo fired to kill a bomber.
1000 rounds of ammo weighed about 194kg (not including links) and you needed enough guns to allow the pilot to fire 1000 rounds of ammo in a reasonable number of firing passes of reasonable length. Not 10 different 10 second firing passes at the same target using a single gun. Obviously some compromises needed to made (10 guns are out of the question) and also obviously the 20mm wasn't a good solution no matter what compromise was reached.