Parachute Recovery Systems

Parachute Recovery Systems

Author: Theo W. Knacke

Publisher:

Published: 1992

Total Pages: 524

ISBN-13:

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The purpose of this manual is to provide recovery system engineers in government and industry with tools to evaluate, analyze, select, and design parachute recovery systems. These systems range from simple, one-parachute assemblies to multiple-parachute systems, and may include equipment for impact attenuation, flotation, location, retrieval, and disposition. All system aspects are discussed, including the need for parachute recovery, the selection of the most suitable recovery system concept, concept analysis, parachute performance, force and stress analysis, material selection, parachute assembly and component design, and manufacturing. Experienced recovery system engineers will find this publication useful as a technical reference book; recent college graduates will find it useful as a textbook for learning about parachutes and parachute recovery systems; and technicians with extensive practical experience will find it useful as an engineering textbook that includes a chapter on parachute- related aerodynamics. In this manual, emphasis is placed on aiding government employees in evaluating and supervising the design and application of parachute systems. The parachute recovery system uses aerodynamic drag to decelerate people and equipment moving in air from a higher velocity to a lower velocity and to a safe landing. This lower velocity is known as rate of descent, landing velocity, or impact velocity, and is determined by the following requirements: (1) landing personnel uninjured and ready for action, (2) landing equipment and air vehicles undamaged and ready for use or refurbishment, and (3) impacting ordnance at a preselected angle and velocity.


Shooter's Bible Guide to Bowhunting

Shooter's Bible Guide to Bowhunting

Author: Todd A. Kuhn

Publisher: Simon and Schuster

Published: 2013-08-01

Total Pages: 884

ISBN-13: 1628734043

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From the most trusted name in guns and ammunition comes this ultimate reference on bowhunting. The Shooter’s Bible Guide to Bowhunting offers everything you need to know about the sport and its gear, from its origin as a means of survival to modern gear. Compound bows and crossbows have undergone an explosive rise in popularity in recent years, due in part, Dr. Todd A. Kuhn explains, to complex socioeconomic, environmental, and biological factors. As expansive tracts of land vanish, many hunters can no longer pursue game with high-powered rifles. That, plus vast improvements in archery gear, has hunters flocking to compound bows and crossbows as alternatives. In the Shooter’s Bible Guide to Bowhunting Dr. Kuhn examines all things bowhunting and archery. Topics covered include: Compound, recurve, and traditional bows Arrows and broadheads Sights and rests Releases and triggers Quivers Tree stands, blinds, decoys, and other popular gear This exhaustive desk reference provides a never before seen look into the history and engineering of archery, theories and trends in game discipline, and, of course, an exhaustive catalog of archery equipment both new and traditional.


Human Missions to Mars

Human Missions to Mars

Author: Donald Rapp

Publisher: Springer

Published: 2015-10-31

Total Pages: 604

ISBN-13: 331922249X

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A mission to send humans to explore the surface of Mars has been the ultimate goal of planetary exploration since the 1950s, when von Braun conjectured a flotilla of 10 interplanetary vessels carrying a crew of at least 70 humans. Since then, more than 1,000 studies were carried out on human missions to Mars, but after 60 years of study, we remain in the early planning stages. The second edition of this book now includes an annotated history of Mars mission studies, with quantitative data wherever possible. Retained from the first edition, Donald Rapp looks at human missions to Mars from an engineering perspective. He divides the mission into a number of stages: Earth’s surface to low-Earth orbit (LEO); departing from LEO toward Mars; Mars orbit insertion and entry, descent and landing; ascent from Mars; trans-Earth injection from Mars orbit and Earth return. For each segment, he analyzes requirements for candidate technologies. In this connection, he discusses the status and potential of a wide range of elements critical to a human Mars mission, including life support consumables, radiation effects and shielding, microgravity effects, abort options and mission safety, possible habitats on the Martian surface and aero-assisted orbit entry decent and landing. For any human mission to the Red Planet the possible utilization of any resources indigenous to Mars would be of great value and such possibilities, the use of indigenous resources is discussed at length. He also discusses the relationship of lunar exploratio n to Mars exploration. Detailed appendices describe the availability of solar energy on the Moon and Mars, and the potential for utilizing indigenous water on Mars. The second edition provides extensive updating and additions to the first edition, including many new figures and tables, and more than 70 new references, as of 2015.


Ram Accelerators

Ram Accelerators

Author: Kazuyoshi Takayama

Publisher: Springer

Published: 2012-03-29

Total Pages: 0

ISBN-13: 9783642468780

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Ram accelerators are among the most advanced tools for generating fluid dynamcis data in supersonic reacting systems. They require the combined action of combustion, wave systems and turbulence and are still a serious challenge for physicists and engineers. This book will serve as an introductionary textbook on ram accelerators and gives a thorough overview on research activities, performance modeling and high-pressure detonation dynamics.


Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports

Author:

Publisher:

Published: 1995

Total Pages: 456

ISBN-13:

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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.


Rotorcraft Aeromechanics

Rotorcraft Aeromechanics

Author: Wayne Johnson

Publisher: Cambridge University Press

Published: 2013-04-29

Total Pages: 949

ISBN-13: 1107355281

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A rotorcraft is a class of aircraft that uses large-diameter rotating wings to accomplish efficient vertical take-off and landing. The class encompasses helicopters of numerous configurations (single main rotor and tail rotor, tandem rotors, coaxial rotors), tilting proprotor aircraft, compound helicopters, and many other innovative configuration concepts. Aeromechanics covers much of what the rotorcraft engineer needs: performance, loads, vibration, stability, flight dynamics, and noise. These topics include many of the key performance attributes and the often-encountered problems in rotorcraft designs. This comprehensive book presents, in depth, what engineers need to know about modelling rotorcraft aeromechanics. The focus is on analysis, and calculated results are presented to illustrate analysis characteristics and rotor behaviour. The first third of the book is an introduction to rotorcraft aerodynamics, blade motion, and performance. The remainder of the book covers advanced topics in rotary wing aerodynamics and dynamics.


Electron and Proton Observations

Electron and Proton Observations

Author: Ludwig Katz

Publisher:

Published: 1966

Total Pages: 32

ISBN-13:

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Results of the following trapped radiation experiments are discussed: 1-4 MeV electrons as observed during the fall of 1963 on a polar satellite, with an emphasis on the changes this population is subject to even at a period of relative solar quiet; 1 to 4 MeV protons obtained in a recent rocket flight near the equator up to L values of 3.7; 55 MeV protons observed periodically over a period of 4 years mirroring at the South Atlantic anomaly.