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Problem 3 (30 pts) You are working as an engineer for a company that builds, markets, and develops small satellites. A venture capital company has approached you and offers a newly invented electric propulsion system. They want you to fly the new system on an upcoming technology demonstration mission. For proprietary reasons, they will only state that the thruster uses a combination of electrostatic and magnetic fields to accelerate the propellant. The thruster operates best in steady state mode and uses Argon as propellant. The tank can hold5kgof Argon. They advertise that this system has good performance, and that this performance has been demonstrated in their ground test facility, where they were also able to reliably duplicate the following system parameter: Electric power input to the system:150WThrust level:250mNSpecific impulse, steady state:1500sDemonstrated life: in a test of250h,6kgof propellant were consumed to achieve these performance levels in steady state operations. The thruster completed the test and is available for external inspection, it cannot be disassembled. a) Calculate the total propellant consumed in the life test of250hand compare it with the alleged consumption of6kg. Any answer would need to include the general propulsion definition equations and not just the final number. (10 pts) b) Calculate the propulsive power and compare with the150wquoted by the company. Any answer would need to include the general propulsion definition equations and not just the final number. (10 pts) c) Does this system have merits to be used on the demonstration mission? Please state explicit reason(s) for your assessment. (10 pts)

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