Manufacturer RSC Energia Operator Roscosmos Launch mass 8,180 kg (18,030 lb) | Country of origin Russia Applications Space station resupply | |
Spacecraft type Automated cargo spacecraft | ||
TGK PG (Russian: Транспортный Грузовой Корабль Повышенной Грузоподъемности (ТГК ПГ), 'Cargo vehicle with increased payload capacity') is an automated cargo spacecraft project to replace Progress-MS as the Russian logistic vehicle to the ISS. It was requested for development to take advantage of the increased lift capacity of the Soyuz-2.1b. The initial development contract was awarded to RSC Energia by Roscosmos on Dec. 11, 2015. The spacecraft is not expected to fly before 2020.
Spacecraft description
Born out of the need to reduce the flights to the ISS from 2018 onward, it was designed as a radical departure from the Progress design. It would incorporate concepts and technologies developed from the Federation and Progress-MS projects. One critical characteristic would be a 370 days on-orbit design life, compared to the 210 days of the Progress and Soyuz. This would allow less ships to be launched per year while maintaining a full complement on the station. It would consist of a service module on the aft, an unpressurized propellant cluster of six tanks on the center, a pressurized module with docking adapter on the fore and a truss structure connecting all the parts. It would use the reaction control system of the Progress-MS and an orbital maneuvering rocket engine already developed for another spacecraft. The new design would have a single deposit of propellant that could be used by the spacecraft or to refuel the space station.