Antonov An-225 Mriya
The Antonov An-225 Mriya  was a Russian/Ukrainian Aircraft, and the largest airplane by weight in the world. It had 6 engines, which was necessary for its sheer size. It was manufactured by a company called Antonov. The Mriya was designed to transport the Russian Shuttle, Space Shuttle Buran. The Buran only flew once, and was successful. However, the funding of Buran was insufficient, and, the project quickly ended. The remaining plane, registration UR-82060,  was used to  carry very large items that were not efficient by train, to be carried by the Antonov.