Electromagnetic Launching for Affordable Agile Access to Space

Electromagnetic Launching for Affordable Agile Access to Space

Author: Rainer Meinke

Publisher:

Published: 2006

Total Pages: 72

ISBN-13:

DOWNLOAD EBOOK

The conceptual design of a novel hypersonic electromagnetic launch system has been developed, which offers reliable access to space. While the concept can be scaled in both mass and launch speed, the performed study assumes a 100-kg projectile leaving the launcher at 7,000 m/sec. The projectile is propelled and levitated by electromagnetic forces inside of a low pressure tube filled with helium at about 10 torr. A fully controlled acceleration profile, which can be adjusted to meet the requirements of various missions, is used to reach 5000 gee in a 500-meter long launch tube. A constant-flux synchronous motor concept, developed under this contract, is a breakthrough technology that provides contact-free propulsion and self-centering suspension with sufficient stiffness and thrust. The use of high current, persistent mode, superconducting coils in the projectile generates high thrust force with near-zero heat dissipation. No brushes or projectile supplies are needed, eliminating contact phenomena. The low pressure helium atmosphere inside of the launch tube is proposed, which nearly eliminates both aerodynamic and heat transfer effects(force, torque and heating) due to high speed gas flow around the projectile, with large safety margins. The proposed technology therefore removes several of the technical problems that have made hypersonic electromagnetic launch unfeasible, in particular the inductive heating of the projectile when a contact-free armature is desired.


A Review of United States Air Force and Department of Defense Aerospace Propulsion Needs

A Review of United States Air Force and Department of Defense Aerospace Propulsion Needs

Author: National Research Council

Publisher: National Academies Press

Published: 2007-01-14

Total Pages: 288

ISBN-13: 0309102472

DOWNLOAD EBOOK

Rocket and air-breathing propulsion systems are the foundation on which planning for future aerospace systems rests. A Review of United States Air Force and Department of Defense Aerospace Propulsion Needs assesses the existing technical base in these areas and examines the future Air Force capabilities the base will be expected to support. This report also defines gaps and recommends where future warfighter capabilities not yet fully defined could be met by current science and technology development plans.


Movement And Maneuver In Deep Space

Movement And Maneuver In Deep Space

Author: Brian E. Hans

Publisher:

Published: 2020-11-24

Total Pages: 74

ISBN-13: 9781608881932

DOWNLOAD EBOOK

From the authors' abstract: "This analytical study looks at the importance of Deep Space Operations and recommends an approach for senior policy leaders. Section 1 presents a capability requirements definition with candidate solutions and technology strategies. Section 2 recommends an acquisition and organizational approach. Section 3 provides an extended strategic rationale for deep space operations as a national priority." And from the Introduction: [this essay] "presents capability requirements, potential solutions, and strategic rationale for achieving movement and maneuver advantage in deep space. In this context, deep space is anything beyond geosynchronous Earth orbit (GEO). Driving the research are two primary assumptions underpinning the need for investment in deep space propulsion. The first assumption is that growing international activity, commerce, and industry in space extends the global commons, thus creating a military-economic imperative for the United States Department of Defense (DoD) to expand its protection of U.S. interests by defending space lines of communication. Although there are wide-ranging reasons to expand the space-faring capabilities of the human species, from the capitalistic to the existential, the fact of its occurrence offers the U.S. immense strategic opportunity. Section 1, operating on this assumption, recommends capability-based requirements for deep space operations given a projected future operating environment.The second driving assumption underpinning this study is that improved movement and maneuver capabilities in deep space offer a wide array of benefits for the current National Security Enterprise, and for this reason alone demands attention in the form of disciplined investment. Furthermore, because the core functional capability required for deep space operations is in-space propulsion, the requirement necessitates a materiel solution.


Smaller Satellites: Bigger Business?

Smaller Satellites: Bigger Business?

Author: Michael J Rycroft

Publisher: Springer Science & Business Media

Published: 2013-06-29

Total Pages: 610

ISBN-13: 9401730083

DOWNLOAD EBOOK

Y. Fujimori, Symposium Programme Committee Chair, and Faculty Member, International Space University e-mail: [email protected] M.Rycroft, Faculty Member, International Space University e-mail: [email protected] N. Crosby, International Space University e-mail: [email protected] For the sixth annual ISU Symposium the theme was "Smaller Satellites: Bigger Business? Concepts, Applications and Markets for Micro/Nanosatellites in a New Information World". Thus, the Symposium addressed the crucial question: are small satellites the saviour of space programmes around the world It did this from the unique perspective of the International Space today? University - the interdisciplinary, international and intercultural perspective. This Symposium brought together a variety of people working on small satellites - engineers, scientists, planners, providers, operators, policy makers and business executives, together with representatives from regulatory bodies, from national and international organizations, and from the finance sector, and also entrepreneurs. Discussion and debate were encouraged, based on the papers presented and those published here.


Meteoroids and Orbital Debris

Meteoroids and Orbital Debris

Author: Cynthia A. Belk

Publisher:

Published: 1997

Total Pages: 32

ISBN-13:

DOWNLOAD EBOOK

Descriptions are presented of orbital debris source, distribution, size, lifetime, and mitigation measures.