%0 Journal Article %T Continuous thrust tangential or perpendicular to the flight direction on a given transfer trajectory in planar Circular Restricted 3-Body Problem %A Mircea DUMITRACHE %J INCAS Bulletin %D 2011 %I National Institute for Aerospace Research ˇ°Elie Carafoliˇ± - INCAS %R 10.13111/2066-8201.2011.3.2.3 %X This paper presents a systematic study for analytical determination of thrust acceleration magnitude on a given trajectory for a case where the thrust is tangential or perpendicular to the flight direction. The problem has been formulated using the planar Circular Restricted Three-Body Problem. In the numerical application for tangential thrust the transfer from low Earth orbit to planar Lyapunov orbits around L1 and L2 Lagrangian points by a semi-elliptic transfer path is considered. For the case in which the thrust is perpendicular to the flight direction also on a semi-elliptic trajectory, the results are compared to the ones of Miele and Mancuso (2001), and Sandro da Silva Fernandes (2010) in their studies based on a simplified version of the same restricted three-body problem of transferring a spacecraft from a circular low Earth orbit to a circular low Moon orbit. %K planar Circular Restricted Three-Body Problem %K given trajectory %K continuous thrust control %K Earth-Moon system %K low Moon orbit %K Lagrangian points %U http://bulletin.incas.ro/files/dumitrache_mircea_v3_is2_full.pdf