Hybrid helium heater pressurization system and electrical igniti

Details Hybrid helium heater pressurization system and electrical igniti Hybrid helium heater pressurization system and electrical igniti

1994-10-13

1998-03-03

Thorpe, Timothy

Power plants

Reaction motor

Liquid oxidizer

60 3948, 60726, 60251, F02K 972, F02K 950

Patent

active

057222320

ABSTRACT:
A system for pressurizing a liquid oxygen tank (20) in a pressure-fed hybrid rocket (100) provides pressure at a first end of the tank (20) so that liquid oxygen can exit the second end. A hybrid heater (50) creates the pressure by mixing gaseous oxygen with the solid fuel (51) in the hybrid heater (50) to create an extremely high temperature. Helium is then mixed with the combustion products via an inlet (60) and this hot, inert mixture enters the liquid oxygen tank (20) via a diffuser (70). A second hybrid heater (90) pressurizes the gaseous helium sphere (40) to reduce the pressure decay caused by the withdrawal of the helium. Two of the hybrid heaters (50 and 90) are fed gaseous oxygen from a sphere (30). A novel ignition system is used to ignite the hybrid heaters (50, 90, 250). One of the hybrid heaters (250) is used to ignite the hybrid motor (100) in the rocket (11).

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