| 1. | In a standard hybrid rocket motor, the solid material is the fuel.
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| 2. | The hybrid rocket concept can be traced back at least 75 years.
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| 3. | In the 1960s, European organizations also began work on hybrid rockets.
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| 4. | The AMROC-derived hybrid rocket motors were used in several SpaceDev projects that followed.
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| 5. | SpaceDev's hybrid rocket technology was pioneered by the American Rocket Company, or AmRoc.
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| 6. | Still, it qualified as the world's first balloon launch of a hybrid rocket.
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| 7. | In a reverse hybrid rocket motor, the oxidizer is solid.
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| 8. | They are currently in the development process of their second student-built hybrid rocket engine.
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| 9. | Its current research and development is on Hybrid Rocket engines.
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| 10. | The Dawn team develops and tests hybrid rocket motors.
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