Download Elements of space technology by Rudolph X. Meyer PDF

By Rudolph X. Meyer

This ebook is written for an introductory direction in house expertise. it really is meant for senior or graduate point aerospace engineering scholars engineers looking a radical realizing of the aerospace facets of area structures. As such it specializes in the first physics and engineering basics essential to comprehend and layout house established structures. The ebook doesn't contain the fundamentals of spacecraft electronics, simply because this is often lined in lots of structures and electronics books and is sometimes lined in follow-up classes.

* Derived from the author's thirty years of expertise within the aerospace and a number of other years of collage instructing experience
* greater than a hundred thirty illustrations
* complicated topics and difficulties indicated by way of asterisks(*)allow the reader and the teacher to disregard subject matters with out wasting continuity
* All chapters correspond to the engineering subdivisions normally present in the aerospace industry
* contains usa and overseas technologies
* large appendix of vital information, now not simply positioned in different sources
* The ebook doesn't comprise the fundamentals of spacecraft electronics

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Extra resources for Elements of space technology

Example text

This equality follows directly from the m o m e n t u m equation for a control volume b o u n d e d by the interior surfaces and by the nozzle exit surface. 26) The form of this equation is not quite as obvious as it might appear. It is important to note that the first term is m d V / d t , not d ( m V ) / d t . It may therefore be ofhistorical interest to mention here that Newton expressed his second law, albeit for constant mass, by the time derivative of the m o m e n t u m (his "vis motionis"), rather than of the velocity as is done in most elementary textbooks today.

In principle, the gas velocity and thermodynamic variables of state would not have to be exactly the same in a static test firing as compared with actual flight on an accelerating, and possibly spinning, vehicle. However, because the acceleration of the gas in the nozzle is m a n y orders of magnitude larger than the vehicle's acceleration, the difference arising from this cause between static tests and flight is negligible. In some solid-propellant motors, some slag may be retained in the motor case.

The origin of time will be taken at the time of launch. The time at thrust termination will be designated by t~. The mass of the vehicle is re(t), with m0 at launch and ml at, and after, thrust termination. 30') is the ratio of thrust to initial weight. 31') at the time tl of thrust termination. 31') reflects the fact that the m a x i m u m velocity achievable for a given mass ratio and specific impulse becomes smaller for smaller values of the ratio of thrust to initial weight. In the limit as fl0 ~ c~, that is, if an infinite thrust could be applied instantaneously at the time of launch, the second term would vanish.

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