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As for NASA, the agency is now studying a variety of options, including the use of Titan rockets with the Centaur, as well as of the shuttle itself but with a different upper-stage that is fueled by solid propellants instead of the touchy hydrogen/oxygen mixture. nbsp;to convert water into a hydrogen/oxygen gas which is then used to power its original internal combustion engine. The power plant, known as an "engineering model" includes an advanced hydrogen/oxygen PEM fuel cell stack that provides 30 volts and up to 12 kilowatts of power without any power electronics, providing weight and reliability advantages. |
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