by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English
|Statement||James E. Colvin and Geoffrey A. Landis.|
|Series||NASA-CR -- 189238., NASA contractor report -- NASA CR-189238.|
|Contributions||Landis, Geoffrey A., United States. National Aeronautics and Space Administration.|
|The Physical Object|
Liquid Propellant Comparison Based On Vehicle Performance. An evaluation of metallized propellants based on vehicle performance. ROBERT ZURAWSKI and JAMES GREEN; 23rd Joint Propulsion Conference August Effect of inert propellant injection on . The total propellant needed for ascent is mT of methane and mT of oxygen The mission timeline for this study was based on the assumption that the ISRU system and MAV will be emplaced one mission opportunity ahead of human arrival, and that the MAV must be fully fueled prior to human departure. Polar Landing Site for a First Mars Expedition, presented at the Founding Convention of the Mars Society, August Characterization of Martian Surface Deposits by the Pathfinder Rover, Sojourner; Magnetic Shielding; Effect of Inert Propellant Injection on . The effect of inert gas injection on rocket engine performance was analyzed with a numerical combustion code that calculated chemical equilibrium for engines of varying combustion chamber pressure.
Mars orbit rendezvous eases the maneuvering challenge for the Mars ascent vehicle. In Figure 4, the vertical scale has twice the range as in Figure 3. Payload fractions over 10% are possible with stage propellant fractions above 75%. A single stage Mars ascent vehicle also appears feasible. The payload for this option would include little more thanCited by: 9. A propellant or propellent is a chemical substance used in the production of energy or pressurized gas that is subsequently used to create movement of a fluid or to generate propulsion of a vehicle, projectile, or other propellants are energetic materials and consist of a fuel like gasoline, jet fuel, rocket fuel, and an lants are burned or otherwise decomposed to. alternative IMAV propulsion systems, the Mars Ascent Vehicle (MAV)  was chosen as a baseline. The MAV consists of a single common descent stage that delivers all hardware systems to the surface of Mars including the habitats, ascent vehicle, propellant production plant, and other surface cargo. As outlined in the Mars. Propulsion The propulsion subsystem performed major maneuvers such as: trajectory correction maneuvers, which kept the spacecraft on the right path to Mars, and; Mars orbit insertion, which captured the spacecraft into orbit upon arrival at Mars.; The propulsion subsystem was also used to control the spacecraft's position, as a backup to the reaction wheels.
Mars to orbit requires a miniature launch vehicle, to pro-vide a combination of velocity and acceleration beyond the capability of known spacecraft propulsion technology. The ultimate development challenge for a Mars ascent vehicle (MAV) is to achieve an unusually high propellant mass fraction for one or more tiny rocket stages. Reduc-. Watch Dr. Ashley C. Karp from Jet Propulsion Laboratory discuss a hybrid propulsion system for a conceptual Mars Ascent Vehicle (MAV). As part of a potential Mars Sample Return campaign, the MAV. A rocket (from Italian rocchetto "bobbin") is a missile, spacecraft, aircraft or other vehicle that obtains thrust from a rocket engine exhaust is formed entirely from propellant carried within the rocket. Rocket engines work by action and reaction and push rockets forward simply by expelling their exhaust in the opposite direction at high speed, and can therefore work in the. • Mars Ascent Vehicle (MAV): A spacecraft that lands on Mars and is used by astronauts to get back into Martian orbit • Mole: a standard of measure of the amount of a substance • Oxygen (O): Element with a mass of 16 g/mole • Propellant Mixture Ratio: The oxidizer to fuel ratio that makes up rocket propellant.