The plane had a top airspeed of 440 km/h. A total of 6,508 He 111 airframes were produced, five of which still survive today: at the Royal Air Force Museum in the Hendon section of London ...

I have a soft spot for weird and unique aircraft, so of course I had to cover the Heinkel He-111 'Zwilling'. This may look like somebody just stuck two He-111s together...and, well, you'd be correct.