When the first ever version of the Tu-144 supersonic airliner was conceived, they didn't build it all together in one factory. They built the fuselage in one place, inside Moscow city and then decided to move it to Zhukovski city where it could be supplemented with all other parts and systems. To
move such a thing out of the Moscow research center through the city streets they had to build specially-built trolleys that could negotiate the streets, as back in 1968, they didn't have a ready-made means of transportation for this task. These are a few photos of this event.