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Low energy transfers have shown that it is possible to reduce the ∆v cost (and therefore the propellant mass) for a number of transfer types. This is possible by exploiting the natural n-body dynamics characterizing the spacecraft motion within the Solar System. In particular, the concept of ballistic capture makes it possible to reduce the hyperbolic excess velocity upon moon/plant arrival, and allows the spacecraft to perform few orbits at zero cost. Low energy transfers are designed by using impulsive maneuver, and therefore they inherently use chemical propulsion (Figure 1).
DINAMICA SRL
The goal of this project was to evaluate the state-of-the-art of European and US solid propulsion stages and to create an Excel-based design model/workbook for solid propulsion stages. The tool is intended to be used, amongst others, by the ESA CDF for either selecting existing solid rocket motors from a suitably populated database or creating preliminary designs for new solid rocket motors. Having a workbook to model stages based on solid propulsion will help assessment studies to perform trade-offs taking solid propulsion stages into account.
ALTA S.P.A
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