Patent ID: 6581881
Filing Date: 2003-06-24
Classification: B64G,F01D,F02K

Abstract:
A method for placing a payload into orbit by a multifunctional launch vehicle of a combined scheme with cruise liquid rocket engine systems (LRESs), including connecting tandem positioned acceleration rocket units and a head unit with a payload to a central rocket unit in accordance with a launch program and forming a lower multiunit assembly of rocket units by connecting side rocket units to the central rocket unit, firing all the cruise LRESs of the side rocket units and the central rocket unit at lift-off, jointly operating the cruise LRESs of the central rocket unit and the side rocket units until the propellant of the side rocket units is consumed, cutting off the cruise LRESs of the side rocket units and separating the side rocket units from the central rocket unit while continuing operation of the cruise LRES of the central rocket unit until the propellant therein is consumed, cutting off the cruise LRES of the central rocket unit, separating the tandem positioned rocket units and head unit from the central rocket unit and subsequently accelerating the head unit by said rocket units until its placement into orbit, characterized in that identical rocket units having adjustable cruise LRESs with an identical nominal thrust are used to form the lower multiunit assembly of rocket units, at lift-off the launch vehicle is made to ascend by cruise LRESs of the side rocket units at a nominal thrust, and the cruise LRES of the central rocket unitâ€”at a thrust equal to 90-100% of the nominal thrust to be consistent with the terms being used, and the thrust of the LRES of the central rocket unit is kept constant until the launch vehicle reaches a longitudinal acceleration of 12.7-16.7 m/sec2 (1.3-1.7 g), then the thrust of the LRES of the central rocket unit is reduced to 0.3-0.5 of the nominal thrust, and after the cruise LRESs of the side rocket units are cut off, the thrust of the cruise LRES of the central unit is increased to the nominal value.