Measurement of the Lorentz-FitzGerald Body Contraction

A complete foundational discussion of acceleration in context of Special Relativity is presented. Acceleration allows the measurement of a Lorentz-FitzGerald body contraction created. It is argued that in the back scattering of a probing laser beam from a relativistic flying electron cloud mirror generated by an ultra-intense laser pulse, a first measurement of a Lorentz-FitzGerald body contraction is feasible.Comment: 4 pages Letter, submitted to EPJA, dedicated to memory of Walter Greine

Origins of NASA names

Names are selected for NASA spaceflight projects and programs from various sources. Some have their foundations in mythology and astrology or legend and folklore. Some have historic connotations; others are based on a description of their mission, often resulting in an acronym. Included are names of launch vehicles, spacecraft, manned spaceflight programs, sounding rockets, and NASA field installations. This study is limited to names of approved projects through 1974; it does not include names of numerous projects which have been or are being studied or projects that were canceled or postponed before reaching actual flight

The hard start phenomena in hypergolic engines. Volume 1: Bibliography

A bibliography of reports pertaining to the hard start phenomenon in attitude control rocket engines on Apollo spacecraft is presented. Some of the subjects discussed are; (1) combustion of hydrazine, (2) one dimensional theory of liquid fuel rocket combustion, (3) preignition phenomena in small pulsed rocket engines, (4) experimental and theoretical investigation of the fluid dynamics of rocket combustion, and (5) nonequilibrium combustion and nozzle flow in propellant performance

Anthropogenic Space Weather

Anthropogenic effects on the space environment started in the late 19th century and reached their peak in the 1960s when high-altitude nuclear explosions were carried out by the USA and the Soviet Union. These explosions created artificial radiation belts near Earth that resulted in major damages to several satellites. Another, unexpected impact of the high-altitude nuclear tests was the electromagnetic pulse (EMP) that can have devastating effects over a large geographic area (as large as the continental United States). Other anthropogenic impacts on the space environment include chemical release ex- periments, high-frequency wave heating of the ionosphere and the interaction of VLF waves with the radiation belts. This paper reviews the fundamental physical process behind these phenomena and discusses the observations of their impacts.Comment: 71 pages, 35 figure

Endurance testing of downstream cathodes on a low-power MPD thruster

A low-power MPD thruster with downstream cathode was tested for endurance with a series of hollow cathode designs. Failure modes and failure mechanisms were identified. A new hollow cathode (with rod inserts) has emerged which shows promise for long life. The downstream positioning of the cathode was also changed from an on-axis location to an off-axis location. Data are presented for a 1332-hour life test of this new hollow cathode located at the new off-axis location. Xenon propellant was used

The Exploration of Space

No abstract availabl

Empire, Spectacle and the Patriot King: British Responses to Eighteenth-Century Russian Empire

The article was submitted on 11.05.2016.Обращаясь к описаниям представлений, устраиваемых русскими царями, в трудах британских путешественников, автор показывает противоречивый характер британского взгляда на Российскую империю XVIII в. Россия традиционно изображалась как «чужая» империя, а приверженность Британии свободе и разуму противопоставлялась духу несвободы самодержавного государства и иррациональной тяге русского народа к традициям. Однако британские авторы рассказывали в своих отзывах о русских царях, таких как Петр I и его последователи, изображая их как просвещенных монархов. Впечатления британцев о зрелищах, устраиваемых царями, с одной стороны, акцентируют внимание на личностях русских монархов и их реформах и, с другой, иллюстрируют ограниченность народа и его неспособность рассуждать здраво и бороться за свободу. Автор утверждает, что это противоречие сформировалось в представлении британцев о России под влиянием идей Болингброка о царе-реформаторе и России как стране, занимающей промежуточное положение между Востоком и Западом.The author uses examples of British travellers’ responses to Russian tsars’ spectacles to argue that the British view of the Russian Empire in the eighteenth century fosters a contradiction. Traditionally Russia was depicted as an imperial Other in which British liberty and its attachment to reason is contrasted with Russian servility within the autocratic state and Russian citizens’ irrational attachment to tradition. Yet British writers complicate this depiction with Peter the Great, and later tsars, who are depicted frequently as enlightened reformers. Indeed, British travellers’ depictions of tsars’ spectacles at once foreground the tsar’s enlightened reforms and the tsar’s person, but also are characterized as limiting the spectators’ capacity to reason and to pursue liberty. The author maintains that this contradiction is accommodated in the British thought by Bolingbroke’s notion of a reform-minded patriot king and Russia’s often-portrayed middle position between East and West