ocr: LIQUID-FUEL ROCKETS The shuttle uses its main PUEL TANK liquid-fuel rockets tolift off into space. Once there, it uses smaller liquid-fuel engines to maneuver. For OXIDIZER this, the crew needs to TANK repeatedly turn the engines on and off. Solid fuel burns until exhausted, - soit PUMPS would not be suitable. But a liquid-fuel rocket contains separate tanks offuel, such as liquid hydrogen, and oxidizer, VALVES such I as liquid oxygen. The crew can pump fuel and COMBUSTION oxidizer to the combustion CHAMBER chamber to be burned for as long as necessary. NOZZLE
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