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- Since 1957 rockets have been used to carry payload into orbit. This project is a C++ program that finds the fuel needed to send a two-stage rocket into lower earth orbit (LEO) by varying payloads and exhaust velocities in the program. In order to do this the rocket theory equation is used: v = c ln R where the velocity, v, equals the exhaust velocity, c, times the natural logarithm of R, ln R, (which is the weight to fuel ratio of the rocket). We are taking two standard payload weights and varying the engine efficiencies to test weights of fuel. We have successfully computed the results and have charted a graph that explains the changes in the payload with the changes in exhaust velocity. This program will be used to find the relationship between exhaust velocity and fuel. It will also find the relationship of the changes in payload to the changes in fuel. The program was designed to be applicable in the real world, with possibly government or commercial use. If we had more time we would also have incorporated other variables such as the efficiency of solid rocket propellant to liquid propellant and possibly the costs of the materials being varied.
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