301 IAA-AAS-SciTech2019-074 AAS 19-972 PRINCIPLE OF MOTION BASED ON THE KINETIC MOMENT David B. Spencer, * Yury N. Razoumny † and Sergei A. Kupreev ‡ Motion in the central gravitational field is considered on the basis of the law of conservation of angular momentum. It is proved that using to move the spin of elementary particles with a Compton wavelength greater than the distance to the attracting center is energetically more advantageous than using the momentum of these particles. The calculation of motion using hypothetical particles (gravi- tons) is given. The results obtained can be used in experiments to search for low-energy elementary particles and to develop transport objects on new physi- cal principles. * Professor of Department of Aerospace Engineering, Pennsylvania State University, address: University Park, Penn- sylvania, USA. † Professor, Chair of Mechanics and Mechatronics, RUDN University, 6 Miklukho-Maklaya Str., Moscow, Russia, 117198. ‡ Professor of Department of Mechanics and Meсhatronics, RUDN University, 6 Miklukho-Maklaya Str., Moscow, Russia, 117198. INTRODUCTION The ideas of K.E. Tsiolkovsky on jet propulsion are more than 100 years. For further exploration of outer space, more efficient launch methods and methods of movement in space are being devel- oped. According to many experts, new technologies will increase the safety and reliability of launches, remove radioactive waste in space, and take out hazardous production outside the Earth. The purpose of this paper is to prove the possibility and energetic feasibility of applying the principle of motion based on the kinetic moment. The proof is based on two facts. First, the rela- tionship between rotational motion and translational motion in the central field of gravity will be discussed. Then the application of the spin of elementary particles will be considered. As a result, the energy costs for movement will be analyzed. Finally, an example of the application and con- clusions will be presented. FACT NUMBER 1 There is a relationship of rotational motion around the mass center and translational motion of the mass center in the central field of gravity. Consider the movement of a solid dumbbell in a central field (Figure 1). The moments of the attractive forces   and   , relative to the center O are equal to zero. Then the total kinetic moment of the dumbbell  relative to the center O is a constant value. = # + % , (1) where  # – the vector of external kinetic moment of a dumbbell (the vector of the kinetic moment of the mass center of the dumbbell С),