Synerjet for Earth/Orbit Propulsion: Revisiting the 1966 NASA/Marquardt Composite (Airbreathing/Rocket) Propulsion System Study

1985 ◽  
Author(s):  
William J. D. Escher
Keyword(s):  
Propulsion System ◽  
Earth Orbit ◽  
System Study ◽  
Rocket Propulsion

scholarly journals Design and ballistic analysis of the mission for long-term study of the asteroid Apophis by a nanosatellite with an electric rocket propulsion system

2020 ◽  
Vol 4 (3) ◽  
pp. 161-170
Author(s):  
O. L. Starinova ◽  
E. A. Sergaeva ◽  
A. Yu. Shornikov
Keyword(s):  
Propulsion System ◽  
Gravitational Attraction ◽  
Term Study ◽  
Small Bodies ◽  
Rocket Propulsion ◽  
Gravitational Fields ◽  
Optimal Speed ◽  
Long Term Study ◽  
The Earth

The paper considers non-spherical objects with low gravitational attraction, such as asteroids, satellites of the planet and comets. We considered possibility of a mission to small bodies of the solar system of irregular shape on the example of the asteroid Apophis. The authors of the article suggest using a nanoclass spacecraft with an electric rocket propulsion system for a long mission to study Apophis. The purpose of this work is to determine the necessary costs of the working body for all stages of the mission, which includes reaching the asteroid, forming and maintaining a given orbit relative to it. The gravity of the Earth, Sun, and asteroid is taken into account when modeling the controlled movement of the spacecraft. When a spacecraft is moving relative to an asteroid, its gravitational field is described as a superposition of the gravitational fields of two rotating massive points. In this paper, it is proposed to divide the mission into two sections for preliminary ballistic design. The first optimal speed heliocentric flight Earth-asteroid Apophis with the alignment of the speed of the spacecraft and the asteroid. The second is the movement in the vicinity of the asteroid, which includes the optimal speed maneuver for forming the working orbit and maintaining the working orbit for a given time.

Design and Characterization of Optically Clear PMMA/ GOx Hybrid Rocket Propulsion System.

2021 ◽  
Author(s):  
Jordi Estevadeordal ◽  
Holton Miller ◽  
Joshua Yurek ◽  
Elliot Omerza ◽  
Al Habib Ullah ◽  
...  
Keyword(s):  
Propulsion System ◽  
Hybrid Rocket ◽  
Rocket Propulsion
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