FGB clipart

This is a simplified aft view of the propulsion/cargo module used in the TKS vehicles and as the basis for subsequent space station modules and tugs. Aft (left) details are conjectural. Solar arrays are omitted for clarity. The heritage of the space station modules joined to Mir is convoluted (figure 3-1). In all cases, however, they are based on a “universal block,” a vehicle referred to by the Russian acronym FGB (figure 3-2).