Second and final in our series of posts today about very big things is this Soviet K-7 bomber, which dates from 1930s, before jet propulsion. As you can see by the tiny little people in the bottom right, this thing is vast – 28 metres long and 53m wing-to-wing. It weighed 38 tonnes when loaded.
It carried 120 passengers within wings which were 2.3m thick. Melded from chrome-molybdenum steel, the design originally called for six engines, but when built, a seventh had to be added. It first flew in August 1933, but crashed that November, killing 15 people. Two more were ordered, but the project was cancelled before they could be delivered.