What is a B-17 Tokyo Tank?
An additional smaller gasoline tank was added into each wing tip area in later versions of the B-17 to add extra miles to the B-17 range. They were routinely called Tokyo tanks for identification, perhaps a bit optimistic, because a B-17 never got to bombing Tokyo! The two primary tanks in each wing were numbered 1 and 2 in the left and 3 and 4 in the right wing. Gas was transferred from the Tokyo tanks into the main tanks, and even transferred between the four main tanks, by the engineer as needed, one of his prime jobs.
