The Apollo astronauts landed on the Moon and explored it. When they lifted off to return home, they first needed to make lunar orbit, which required a speed of about 5, 500 ft/s The lunar module ascent engine developed a vacuum specific impulse of 310 s. What is the vehicle mass ratio that will allow the engine to achieve the required speed?

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The Apollo astronauts landed on the
Moon and explored it. When they
lifted off to return home, they first
needed to make lunar orbit, which
required a speed of about 5, 500 ft/s
The lunar module ascent engine
developed a vacuum specific impulse
of 310 s. What is the vehicle mass
ratio that will allow the engine to
achieve the required speed?
Transcribed Image Text:The Apollo astronauts landed on the Moon and explored it. When they lifted off to return home, they first needed to make lunar orbit, which required a speed of about 5, 500 ft/s The lunar module ascent engine developed a vacuum specific impulse of 310 s. What is the vehicle mass ratio that will allow the engine to achieve the required speed?
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