Tag: Space Tug

Shown on this chart is an artist’s rendition of a tug configuration which is made up of individual propellant modules and thus provides extreme operational flexibility. The stage is designed to be compatible with a variable number of propellant modules which contain oxidizer, fuel and pressurants. The basic propulsion platform includes engines, control, avionics and primary structure. In concept, the configuration has the option of staging tanks for extremely high performance.

Although this modular concept is extremely versatile, it has a lower mass fraction than one which is designed for a single performance capability.

Image credit: NASA
File source: NASA NTRS

The overall view shows a Cislunar Shuttle being approached by an unmanned maintenance Tug. The Tug has three replacement modules attached to a turntable assembly. The first view shows an expanded section of the Cislunar Shuttle with the Tug approaching. The Tug will be docked with the Cislunar Shuttle using a standard docking mechanism. The second small view shows the Tug harddocked to the Cislunar Shuttle. A module is being removed from the Shuttle. The third small view shows the turntable rotated and a module being installed in the Cislunar Shuttle. After the operation is completed the two vehicles are demated and the Tug backed off as depicted in the lower illustration.

Image credit: NASA
File source: NASA NTRS

Shown here is an artist’s concept of a manned Space Tug servicing a communications satellite. Servicing of satellites will be economical and desirable in many cases in the future. However, the satellites will have to be designed to permit servicing. Existing satellite systems which are designed without consideration of inspace maintenance probably could not be effectively serviced even by a highly sophisticated maintenance kit used in conjunction with a manned Tug.

Image credit: NASA
File source: NASA NTRS