Some have been on my mind for long, but other might be handpicked details occuring in the postings and debate at the forum!
Depending on the range of mission could the B-17 load up to 8000lb of bombs.
Machinegun ammunition had a total weight of 3300lb
The 13 Browning M2's including the bracings without turrets had about the same weight.
The eight gunners would weight aprox. The half.
In total weighed the defencies of the B-17 More than the bombs delievered :-o
Edited by Armand, 03 January 2017 - 09:13 PM.