Weight Analysis of Two-stage-to-orbit Reusable Launch Vehicles for Military Applications - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Weight Analysis of Two-stage-to-orbit Reusable Launch Vehicles for Military Applications write by Richard A. Caldwell. This book was released on 2005. Weight Analysis of Two-stage-to-orbit Reusable Launch Vehicles for Military Applications available in PDF, EPUB and Kindle.
Concepts of Operations for a Reusable Launch Vehicle
Concepts of Operations for a Reusable Launch Vehicle - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Concepts of Operations for a Reusable Launch Vehicle write by Michael A. Rampino. This book was released on 1997. Concepts of Operations for a Reusable Launch Vehicle available in PDF, EPUB and Kindle. The United States is embarked on a journey toward maturity as a spacefaring nation. One key step along the way is development of a reusable launch vehicle (RLV). The most recent National Space Transportation Policy (August 1994) assigned improvement and evolution of current expendable launch vehicles to the Department of Defense while National Aeronautical Space Administration (NASA) is responsible for working with industry on demonstrating RLV technology. The purpose of this study is to help ensure the US military, especially the USAF, is prepared to take advantage of RLVs should the NASA-led effort to develop an RLV demonstrator prove successful. The focus of this study is an explanation of how the US military could use RLVs, by describing and analyzing two concepts of operations. Four major conclusions resulted from the analysis. First, RLVs have military potential. They can perform a variety of missions including responsive spacelift, reconnaissance, and strike. However, the economic feasibility of using RLVs for earth-to-earth transportation is questionable. Second, design choices for an operational RLV will have effects on risk, cost, capability, and operations efficiency. Trade-offs will have to be made between NASA, commercial, and military requirements if all three parties are to use the same fleet of RLVs. Third, increased investment in propulsion technology development is warranted to ensure success. Fourth, the top priority for the RLV program, even from the military's perspective, should remain cheap and responsive access to space. The research led to three recommendations. First, the US military should become a more active participant in the RLV program to ensure its requirements are defined and incorporated. Second, America should not pursue development of operational RLVs before the technology is ready.
Payload Performance Analysis for a Reusable Two-Stage-To-Orbit Vehicle
Payload Performance Analysis for a Reusable Two-Stage-To-Orbit Vehicle - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Payload Performance Analysis for a Reusable Two-Stage-To-Orbit Vehicle write by National Aeronautics and Space Administration (NASA). This book was released on 2018-05-22. Payload Performance Analysis for a Reusable Two-Stage-To-Orbit Vehicle available in PDF, EPUB and Kindle. This paper investigates a unique approach in the development of a reusable launch vehicle where, instead of designing the vehicle to be reusable from its inception, as was done for the Space Shuttle, an expendable two stage launch vehicle is evolved over time into a reusable launch vehicle. To accomplish this objective, each stage is made reusable by adding the systems necessary to perform functions such as thermal protection and landing, without significantly altering the primary subsystems and outer mold line of the original expendable vehicle. In addition, some of the propellant normally used for ascent is used instead for additional propulsive maneuvers after staging in order to return both stages to the launch site, keep loads within acceptable limits and perform a soft landing. This paper presents a performance analysis that was performed to investigate the feasibility of this approach by quantifying the reduction in payload capability of the original expendable launch vehicle after accounting for the mass additions, trajectory changes and increased propellant requirements necessary for reusability. Results show that it is feasible to return both stages to the launch site with a positive payload capability equal to approximately 50 percent of an equivalent expendable launch vehicle. Further discussion examines the ability to return a crew/cargo capsule to the launch site and presents technical challenges that would have to be overcome. Tartabini, Paul V. and Beaty, James R. and Lepsch, Roger A. and Gilbert, Michael G. Langley Research Center PAYLOADS; PERFORMANCE PREDICTION; REUSABLE LAUNCH VEHICLES; MULTISTAGE ROCKET VEHICLES; ASCENT; LAUNCHING SITES; PROPELLANTS; SOFT LANDING; TRAJECTORIES; THERMAL PROTECTION; AERODYNAMIC HEATING; REENTRY EFFECTS; CARGO; SPACECREWS; SPACECRAFT MODULES; HEAT SHIELDING
Determining the Economic Plausibility of Dual Manifesting Reusable Launch Vehicles and Reusable Orbital Transfer Vehicles for the Replenishment of Military Satellites
Determining the Economic Plausibility of Dual Manifesting Reusable Launch Vehicles and Reusable Orbital Transfer Vehicles for the Replenishment of Military Satellites - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Determining the Economic Plausibility of Dual Manifesting Reusable Launch Vehicles and Reusable Orbital Transfer Vehicles for the Replenishment of Military Satellites write by Crystal L. Evans. This book was released on 1997-02-01. Determining the Economic Plausibility of Dual Manifesting Reusable Launch Vehicles and Reusable Orbital Transfer Vehicles for the Replenishment of Military Satellites available in PDF, EPUB and Kindle. Currently, the Air Force launches military satellites on expendable launch vehicles to low earth orbit (LEO), and with the use of a chemical upper stage or an apogee kick motor, moves the satellite to a higher orbit. This launch procedure is extremely costly because it requires additional launch preparations, technology considerations, equipment, and fuel. Also, the additional mass of the chemical upper stage causes a larger, and thus more expensive, launch vehicle to be required. An economical alternative is to utilize reusable launch vehicles (RLVs) and reusable orbital launch vehicles (ROTVs). This concept could possibly achieve even greater savings if satellites were dual manifested on the launch vehicles. This thesis determines - by varying mass capacity of RLVs, the cost per kg of RLV mass capacity, and the satellite cost per kg - when, within a given scenario, the savings of dual manifesting is at least ten percent of the cost of single manifesting by developing a dual manifesting algorithm and simulation to analyze possible savings.
Reusable Launch Vehicle
Reusable Launch Vehicle - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Reusable Launch Vehicle write by National Research Council. This book was released on 1996-01-08. Reusable Launch Vehicle available in PDF, EPUB and Kindle. The key to opening the use of space to private enterprise and to broader public uses lies in reducing the cost of the transportation to space. More routine, affordable access to space will entail aircraft-like quick turnaround and reliable operations. Currently, the space Shuttle is the only reusable launch vehicle, and even parts of it are expendable while other parts require frequent and extensive refurbishment. NASA's highest priority new activity, the Reusable Launch Vehicle program, is directed toward developing technologies to enable a new generation of space launchers, perhaps but not necessarily with single stage to orbit capability. This book assesses whether the technology development, test and analysis programs in propulsion and materials-related technologies are properly constituted to provide the information required to support a December 1996 decision to build the X-33, a technology demonstrator vehicle; and suggest, as appropriate, necessary changes in these programs to ensure that they will support vehicle feasibility goals.
