Tank for storing cryogenic fluids and storable fuels

at a tank for storing cryogenic liquids, in particular and storable fuels spacecraft serves and with the conveying medium serving propellant is operated, the separation of the propellant takes place of the liquid in a gas supply and retrieval apparatus by means of screens and utilizing the Surface tension. The gas supply and unloading device is in the form of a refillable Reservoir that while the main thrust phases empties. It is in the upper portion of the tank positioned and arranged circumferentially with a number, to toward the tank widening openings, covered by baffles provided. In the openings one behind the other mutually arranged sheets provided. They are respectively connected via a Twin with the interior of the housing of the gas supply and associated removal device, in the other, parallel to the longitudinal axis the housing extending plates are arranged. In the gas supply and Sampling device penetrating liquid during ballistic phases stored in a reservoir, until they at the subsequent main thrust phase is recycled into the tank.