>>1155769>That's what happens when you don't steal the plans for a high-bypass turbine, comrade.>The prototype was grossly underpowered as its intended NK-8 engines were not ready and small Lyulka AL-7PB turbojet engines had to be installed temporarily. The prototype with AL-7PB engines (registered CCCP-06156) first flew on 3 January 1963 but crashed after clipping a perimeter fence during a maximum weight testing flight of the development programi see where you're coming from