Rob McNaughton wanted to share this
The Model Aircraft Recreation Society RC Flying Club
The M.A.R.S.  Club
Built in Russia during the 1930s, it flew 11 times before crashing and killing 15 people. The
designer,  Konstantin Kalinin, wanted to build two more planes but the project was scrapped.  Later,
Stalin had Kalinin executed.  Evidently, it was not  good to fail on an expensive project under Stalin.  
 
                                                                                                         
It's got propellers on the back of the wings, too. You can count 12 engines facing front.  The size
would be equivalent to the Empire State Building on its side, with cannons.  And you think the 747
was big... not only a bunch of engines but check out the cannons the thing was carrying.                   
                                                                               
In the 1930s the Russian army was obsessed by the idea of creating huge planes.  At that time they
were proposed to have as many propellers as possible to help carry those huge flying fortresses
into the air. Jet propulsion had not been implemented yet.                                                               
                                                                                                         
Not many photos were saved from those times because of the high secrecy levels of such projects
and because a lot of time has already passed. Still, on the attached photos you can see one such
plane - a heavy bomber K-7.     
                                                                            
Can you imagine what it would be like sitting in this thing when those cannons go off? Looks like
something out of a Jules Verne novel.