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Questions tagged [space-tug]

Upper stages of rockets employed to put payloads into mission-defined orbits. Usually fitted with space-restartable engines. Also called orbital transfer vehicles. Some concepts imply repeated orbital maneuvers.

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Is it possible to supply 47 tons of payload to the orbit with 5 tons of fuel?

There are 2 orbits: Circular orbit with 200km altitude Circular orbit with 800km altitude The space tug is already on the first orbit. Its dry mass is 960kg, the total mass of fuel is 5250 kg. It ...
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Could a rescue spacecraft be in an orbit with rendezvous windows for ordinary LEO, GTO or deep space launches?

Sometimes orbital insertion fails which could be fixed by a space tug. I wonder if a tug could be placed in a long term orbit such that it sometimes matches the intended orbit of a launch from Earth. ...
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Does NASA have a space tug project to bring a habitable module to the ISS?

The habitable modules of US sector of the ISS didn't have any propulsion systems to rendezvous the ISS by themselves. They were intended to be brought there by the Space Shuttle. Most of the Russian ...