| 31. | Confusingly, both values are sometimes called specific impulse.
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| 32. | Xylitol and KNO 3 based rocket propellants are capable of a specific impulse of ~ 100 seconds.
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| 33. | The " specific impulse " is the most important metric for the efficiency of a rocket engine.
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| 34. | The Orion concept offered high thrust and high specific impulse, or propellant efficiency, at the same time.
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| 35. | It has a relatively high monopropellant specific impulse of 177 seconds ( 1.7 kN�s / kg ).
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| 36. | It was previously mentioned that the specific impulse could be as high as or higher than 3000 s.
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| 37. | These are best-possible specific impulse calculations.
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| 38. | Both provide very high specific impulse but relatively low thrust, compared to the more typical chemical reaction rockets.
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| 39. | The vacuum version, with a vacuum optimized nozzle shape, has a thrust of with a specific impulse of.
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| 40. | Liquid systems enable higher specific impulse than solids and hybrid rocket engines and can provide very high tankage efficiency.
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