Parom
Encyclopedia
The Parom is a space tug
Space tug
A space tug is a space vehicle used to transfer payloads between low and high Earth orbits, or between Earth orbit and lunar orbit.-Space tug proposals:...

 that has been proposed by RKK Energia. The purpose of this vehicle is to replace most of the Progress' active components. Progress spacecraft
Progress spacecraft
The Progress is a Russian expendable freighter spacecraft. The spacecraft is an unmanned resupply spacecraft during its flight but upon docking with a space station, it allows astronauts inside, hence it is classified manned by the manufacturer. It was derived from the Soyuz spacecraft, and is...

 have flown re-supply missions since 1978. Nikolai Bryukhanov, RKK Energia's deputy general designer, said in May 2005 that the Federal Space Agency had received a design for a new space system. According to him, the system's operation principle is completely different from that used by Progress. A launch vehicle first places a Parom reusable inter-orbit "tug" into a 200 km orbit. As this spacecraft will not carry any consignments, other rockets will orbit payload containers that will be docked by Parom. The tug will then deliver them to the ISS
International Space Station
The International Space Station is a habitable, artificial satellite in low Earth orbit. The ISS follows the Salyut, Almaz, Cosmos, Skylab, and Mir space stations, as the 11th space station launched, not including the Genesis I and II prototypes...

 or another orbiter.

"Any Russian or foreign launch vehicle can orbit such containers," Bryukhanov said. The size of the container and its shape depend on payload characteristics. "This can be an airtight instrument module or a fuel tanker," the deputy general designer continued. "Moreover, depressurized platform featuring large scientific equipment and auxiliary systems, i.e., solar batteries that cannot be stored inside the airtight module".

In layout, the Parom will be built around a pressurized transfer passage with docking ports at each end: each of these two docking ports can be used to dock with the cargo container, the Kliper
Kliper
Kliper is a partly reusable manned spacecraft, proposed by RSC Energia.Designed primarily to replace the Soyuz spacecraft, Kliper has been proposed in two versions: as a pure lifting body design and as spaceplane with small wings...

, the space station or any other spacecraft. It will have its own engines, along with propellant transfer lines to feed fuel from the cargo container into its own tanks or into the space station’s or another spacecraft's tank. It will also have engines scaled to handle cargo modules weighing up to 30 tonnes (around 60,000 pounds), twice the mass of the largest station sections carried into orbit aboard space shuttle
Space Shuttle
The Space Shuttle was a manned orbital rocket and spacecraft system operated by NASA on 135 missions from 1981 to 2011. The system combined rocket launch, orbital spacecraft, and re-entry spaceplane with modular add-ons...

s and Proton rocket
Proton rocket
Proton is an expendable launch system used for both commercial and Russian government space launches. The first Proton rocket was launched in 1965 and the launch system is still in use as of 2011, which makes it one of the most successful heavy boosters in the history of spaceflight...

s.

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