LAUNCH VEHICLE Russian patent published in 2001 - IPC

FIELD: manufacture of rockets; creation (modification) of launch vehicles. SUBSTANCE: launch vehicle has cruising single-chamber engines at first and second stages; thrust of each engine is equal to thrust of l-st stage control engine; third stage is provided with cruising four-chamber engine whose thrust is equal to that of l-st stage control engine; chambers of cruising four-chamber 3-rd stage engine are provided with high-altitude nozzle attachments forming angularity of nozzle contour. Launch vehicle has cruising single-chamber engines at first and second stages; thrust of each engine is equal to that of l-st stage control engine; third stage is provided with cruising four-chamber engine whose thrust is equal to that of 1st stage control engine; chamber of 1st and 2nd stage cruising engines are provided with short nozzles and chambers of cruising 3rd stage engine are provided with common nozzle attachments. EFFECT: enhanced efficiency of unification of cruising and control engines of three stages of launch vehicle; reduced mass; enhanced reliability; low cost. 3 cl, 9 dwg