Abstract: A booster comprises a body including tanks for an oxidizer and fuel, a nose compartment with a dome, a between-tank section and an afterbody, a rocket engine installation, an all-moving wing with a unit for turning it and fixing in a position along the axis of the booster during the ascension step and in a position turned by 90° during the return flight, horizontal and vertical fin assemblies, a triple-point support landing gear, aerodynamic control organs and units for jointing to the second stage of the launch vehicle. The booster is provided with an air-feed jet engine installation, comprising two engines with air intakes mounted in the nose compartment, and with gas-line extensions with exhaust nozzles extending beyond the bypasses of the external contours of the nose compartment, and a propellant system with propellant tanks in the wing, working and balancing tanks in the nose compartment. A wing is mounted on the upper surface of the booster body in the area of the between-tank section.