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Crew Transit Vehicle Design Report

1546 words - 7 pages

In the event of an emergency, NASA and other organizations need to be able to rescue affected astronauts, if the situation permits the possibility. Therefore, the purpose of this crew transit vehicle is to retrieve stranded astronauts from a damaged shuttlecraft or a dangerous situation. This vehicle will be able to transport humans beyond Low Earth Orbit and will have the necessary equipment to treat possible serious injuries suffered by the stranded personnel. The CTV will have the capabilities to travel to the moon and back to Earth as quickly and efficiently as possible.
For the propulsion system, this vehicle will use a solid rocket booster because of it is reliable and provides large amounts of thrust (“Propulsion,” n.d). In addition, it will use a monopropellant engine. This type of engine will be implemented because of its ability to remain stable under standard conditions, outstanding handling characteristics, and its decomposition products are clean (Braeunig, 2012). Additionally, monopropellant engines are controllable and able to restart, as well as offering a significant amount of thrust (“Propulsion,” n.d). Along with being the most commonly used type of propulsion (Braeunig, 2012), it is a reliable engine (“What Is a Monopropellant?” n.d.). A dependable engine is needed for every spacecraft, and it is especially needed for one specifically designed to save individuals from a failing one.
The CTV will use the gimbaled thrust method as its guidance system, as most modern rockets. In this system, the nozzle rotates to change the direction of thrust relative to the center of gravity of the rocket (“Examples of Controls,” n.d.). This type of system will be used because the thrust force will then be utilized in the process of maneuvering the vehicle (“Nozzle Design,” n.d.). The crew members will use hand controls to control the vehicle’s flight course and specialized software to monitor vehicle’s flight. (“Guidance, Navigation, and Control,” 2000) The elements of this system will be enormously useful and beneficial to any mission this vehicle will perform because it will need to move out of the atmosphere with relative ease in order to retrieve individuals trapped in difficult scenarios.
The vehicle will contain life support systems relating to air, thermal protection, water, food, and waste. The air system will consist of a series of loops that will circulate the air throughout the vehicle. The air will go through a filter to remove substances such as carbon dioxide, moisture, and odor, and it will be returned to the system (“Cabin Air Revitalization,” 2002). For thermal protection, materials such as reinforced carbon-carbon; black, high-temperature surface insulation tiles that are reusable; fibrous refractory composite insulation; white, reusable surface insulation tiles designed for low-temperatures; flexible, reusable surface insulation; and white blankets fabricated from coated Nomex will be used (“Thermal Protection System,”...

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