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Download Advances in space science and technology. Volume 5 by Frederick I. Ordway PDF

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By Frederick I. Ordway

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For example, in the synchronous orbit, attitude control permits use of an antenna having a beam width of 17 deg, which reduces the required power by a factor of about 100. The effect is less important at lower altitudes, but even in the 3000-mile orbit power reduc­ tions of about 20 are possible. The second reason for stabilizing the satel- 38 R. P. HAVILAND lite (and the antenna) arise from considerations of constancy of signal. Practical antennas never radiate equally in all directions, and if the an­ tenna is moving a given signal will show variation in signal strength which must be corrected.

Storage Tests D . Drop Tests E. Detonation Tests VI. Solid Propellant Processing A. Extruded Double Base Propellant B. Cast Double Base Propellant C. Composite Rubber Base Propellant 47 Division 48 48 52 524 55 55 56 57 57 57 58 60 61 62 63 63 64 65 65 65 66 66 66 67 68 68 69 70 48 H. W. RITCHEY AND J . M. MCDERMOTT VII. Inspection and Quality Control A. Raw Materials B. In-Process Controls C. Cured Propellant D. Radiographic Inspection VIII. Grain Defects IX. Thrust Vector Control and Thrust Termination X.

Introduction The principles of rocketry are the same for solid fuel rockets as for large liquid-fuel vehicles. The same laws of thermodynamics apply in both types of motor to the generation of a mass of high temperature gas. Fluid dynamics governs the acceleration of this mass to high velocity. Aerodynamic principles are the same. However, a large and growing technology has developed around solid fuels which takes advantage of the ways in which solids differ from liquids. The solid fuels are more dense and are nonvolatile.

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