The Russians built 'em BIG

Rico says it's apparently a real plane, amazingly enough:

In the 1930s, the Russian army was obsessed by the idea of creating huge planes. At that time they proposed using as many propellers as possible to help carrying those huge bombers into the air, jet propulsion having not yet been implemented.

This heavy bomber K-7, built in Russia during the 1930s, has got propellers on the back of the wings, too. You can count twelve engines facing front. The plane's size would be equivalent to the Empire State Building on its side, with cannons. Not many photos were saved from those times because of the high secrecy levels of such projects.

The prototype flew eleven times before crashing and killing fifteen people. The designer, Konstantin Kalinin, wanted to build two more planes, but the project was scrapped.

Kalinin was later executed. It was not good to fail with an expensive project under Stalin's rule.