Browse Items (42 total)

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  "Signal distribution in automatic checkout systems."

  This paper deals with several selected aspects of the signal distribution in automatic checkout systems. These are: 1) The use of relay matrices as control elements; 2) The inclusion of self-checking capabilities; 3) Problems of systems integration. These aspects are not unique to automatic checkout systems. However, due to the nature of automatic checkout systems as presently being designed around digital circuitry, they find either fuller or different applications than in other types of systems. Also, while they are on the surface somewhat disconnected in nature, they tend to interrelate during the implementation of an automatic checkout system.
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  "Space flight : first draft."

  Appears to be a rough dfraft with editorial comments and revision notes. Includes references to figures and tables.; Page 31 is missing. Pages 37 through 44 do not exist; there is a note about this on page 36. Page 67 also does not exist.
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  "Table I : chemical composition of experimental alloys."

  8 x 10 inch black and white photograph of a table reperesenting the chemical composition of alloys M825 and M826.
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  "Technical Information Summary Apollo 8 (AS-503) Apollo Saturn V Space Vehicle."

  This document is prepared jointly by the Marshall Space Flight Center laboratories R-AERO-P, R-ASTR -S, and R-P&VE-VN . The document presents a brief and concise description of the AS-503 Apollo Saturn Space Vehicle. Where necessary, for clarification, additional related information has been included. It is not the intent of this document to completely define the Space Vehicle or its systems and subsystems in detail. The information presented herein, by text and sketches, describes launch preparation activities, launch facilities, and the space vehicle. This information permits the reader to follow the space vehicle sequence of events beginning a few hours prior to liftoff to its journey into space.
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  "Technical information summary Apollo-10 (AS-505) Apollo Saturn V space vehicle."

  The document presents a brief and concise description of the AS-505 Apollo Saturn Space Vehicle. Where necessary, for clarification, additional related information has been included.
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  "Technical Information Summary Apollo-9 (AS-504) Apollo Saturn V Space Vehicle."

  The document presents a brief and concise description of the Apollo 9 Saturn Space Vehicle.
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  "Technician inspects an RL10 liquid hydrogen engine."

  A technician inspects an RLlO liquid hydrogen rocket engine OD the assembly floor. of Pratt & Whitney Aircraft's Florida Research and Development Center. The 115,000-pound-thrust RLlO was designed and developed for the National Aeronautics and Space Administration's Saturn S-IV azld Centaur space vehicles.
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  "Technique for reliability circuit design review in space electronics."

  Design review is becoming a basic requirement during the design and development of military systems. The main purpose of the design review is to increase the system's inherent and operational reliability. The major portion of this paper is the result of reliability's effort to comply with Paragraph 3.6 of NPC 250-1 Reliability Program Provisions for Space Contractors. The design review to be discussed is a reliability circuit design review with emphasis placed on what should be reviewed and the review techniques employed. The basic circuit design review prerequisites, component parts and their ratings, are discussed at the beginning of this paper. The remainder deals with the organization and reviewing of circuits. The review items include worst-case circuit performance, component applications, failure mode analysis, noise rejection, electrical stress, and the determination of component temperatures. Many examples are included to illustrate how each item was accomplished. This paper is intended not only to give the reliability analyst cognizance of basic design problems and troublesome circuits, but also, to aid him in formulating a design review program.
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  "The Development of Servovalves with Improved Reliability for Space Vehicles."

  Considerations for improvement in the reliability of the Saturn engine gimbal servosystems are briefly covered. The Saturn I servovalves operate with increased electrical input power. The Saturn V vehicle stages will use mechanical feedback actuators with increased electrical input power, larger orifices and nozzle sizes, larger torque motor wire size, and greater spool driving forces.
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  "The impact of manufacturing on design as related to accessibility."

  The purpose of this paper is to emphasize the need for accessibility in the assembly and maintenance of spacecraft. This is especially pertinent because accessibility to subsystems for replacement, repair, and maintenance has proven to be one of the more costly phases of preflight preparation. The most successful programs in this day and age have been when the design and manufacturing engineers work side by side around a mockup where solutions to the problems can be visually seen and solved, keeping in mind the assembly as related to accessibility. Therefore, it will be shown that in order to overcome the difficulties, designers should adapt a hard, fast ground rule that each unit must be accessible and individually removable without disturbing the other units.; Aeronautic and Space Engineering and Manufacturing Meeting, Los Angeles, Calif. Oct. 7 - 11, 1968.