Durability of aircraft to MG (< 8mm) guns

[Flying Pencil]

Originally Posted by winny

In contrast, only 23% of the 7.92 mm bullets reached the armour, and just 1% penetrated.

Notice how close they were fired from, and the He-111s had better armour than a blenheim.
Add to that the fact that only 2 of the 8 guns would have had AP rounds and you end up with a lot of German bombers getting home when they shouldn't have.

I had read this test before, (It was a Blen I, but practically same rear to Blen IV), but the lower penetration of 7.92 is new to me!

Thanks!