FIRST STAGE OF MULTISTAGE LAUNCH VEHICLE Russian patent published in 2004 - IPC

FIELD: spacecraft.

SUBSTANCE: first stage of multistage launch vehicle is made in form of self-contained device with its own jet engines and tanks for oxidizer and propellant, being arranged axially symmetrically around second stage unit, also provided with jet engines and tanks for oxidizer and propellant. Main combustion chambers of stage jet engines are arranged over ring perimeter of end face close to each other, being enclosed by common afterburning chamber. Tubular wall of first stage is made up over ring perimeter without clearance from several detachable sectors, each provided with oxidizer and propellant tanks, its inner surface being connected with central of second stage through two tiers of pylons. Pylons are connected with central unit of second stage by means of jettisoning devices. All sectors at one height from main chambers over inner closed tubular surface of first stage are provided with projections forming in closed state a ring neck more narrow than inner diameter of arrangement of main chambers and ring cone in form of which head part of first stage is made. Ratio of inner diameter of arrangement of main chambers of first stage to outer diameter of central unit of second stage at level of its main chambers is from 1.2 to 3.5.

EFFECT: increased starting speed of spacecraft at boost trajectory.

2 cl, 7 dwg