| 11. | It was fed by small-diameter flexible lines carrying liquid hydrogen and liquid oxygen.
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| 12. | As a result, the igniter fed pure liquid oxygen into the pressure chamber.
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| 13. | Using liquid hydrogen and liquid oxygen, cryogenic engines work at extremely low temperatures.
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| 14. | The Quebec-class was plagued with problems caused by liquid oxygen evaporation.
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| 15. | Another relies on liquid oxygen, not the most portable of materials.
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| 16. | But within minutes, incoming air would begin to supplement liquid oxygen.
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| 17. | Normally, you carry six pounds of liquid oxygen for every pound of hydrogen.
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| 18. | Early LR87 engines used on the Titan I burned RP-1 and liquid oxygen.
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| 19. | The engines were to use liquid oxygen and kerosene as propellants.
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| 20. | The fuel cell mixes liquid oxygen and hydrogen to produce electricity for the shuttle.
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