DUAL-MODE SOLID-PROPELLANT ROCKET ENGINE Russian patent published in 2009 - IPC F02K9/28 

FIELD: engines and pumps.

SUBSTANCE: invention is related to rocket engineering and may be used in creation of aircrafts that comprise dual-mode engine. Dual-mode solid-propellant rocket engine comprises body, the first and second mode charges serially installed in it, front cover, initiation units, nozzle. Charges of the first and second modes are separated by intermediate elastic bottom comprising elastic membrane and sleeve installed in the second mode charge channel. Elastic membrane and sleeve are fixed to each other with the help of programmed damaged joint. Opposite ends of sleeve and membrane are fixed on front cover and body accordingly. Cavity created by surface of the second mode charge and external part of intermediate bottom, is connected to receiver installed in front cover, and in body of the second mode charge initiation unit, check valve is installed, which covers flow openings, as well as ignition composition that protects against high-temperature compressed air during operation of the first mode charge.

EFFECT: invention makes it possible to increase reliability of the second mode charge and rocket engine operation reliability due to elimination of possibility of unauthorised ignition of the second mode charge.

2 dwg