Consider this blog entry courtesy of an exhibit at the United States Air Force Museum, Dayton, Ohio, USA.
From the era of the Second World War the German BK 5 cannon. One hit from this weapon and you were toast.,
"The Bordkanone 5, or BK 5 for short, was a 50 mm auto cannon intended primarily for use against Allied heavy bombers, especially the United States Army Air Forces's (USAAF) Boeing B-17."
BK-5 as seen at the United States Air Force Museum, Dayton, Ohio, USA. A monster!
GERMAN BK-5 50 mm CANNON.
"The BK-5 was an adaptation of a tank gun and was intended primarily for use against Allied heavy bombers. Its magazine held 22 rounds and the gun had a rate of 45 rounds per min. BK-5 cannon were installed in some Me-410 twin-engine interceptors and experimentally in the Me-262 fighter, but the war ended before testing with the latter aircraft could be completed. Only about 300 of these guns were produced and combat usage was limited."
"You might find Germany some jet airplanes equipped with anti-tank guns. Don't blame me for such monstrosities. This was done on the explicit orders of the Fuehrer. Hitler knew nothing about the air. He may have known something about the Army or Navy, but absolutely nothing about the air. He even considered the Me-262 to be a bomber and he insisted it should be called a bomber." - - H. Goering.
DON'T BLAME ME, IT WAS THE OTHER GUY!