Improved prediction of laminar leading edge separation

Research was conducted to provide a definite criterion for the prediction of the bubble burst on airfoils typical of those used for fighter wings. The approach taken was to correlate existing airfoil bubble burst data using various parameters at the laminar separation point. The method due to Weber was modified to provide a continuous analytic solution for the velocity distribution around the airfoil leading edge. Coupling the modified Weber method with the Stratford laminar separation prediction method leads to a universal chart giving the conditions at separation as a function of stagnation location and leading edge radius. Application of the combined method to available two-dimensional airfoil data resulted in an empirical criterion presenting the limiting local velocity gradient at separation as a function of the boundary layer momentum thickness at separation for bubble burst. The correlation leads as well to the qualitative explanation of two types of laminar stall: thin airfoil and leading edge. The validity of the correlation is demonstrated by predicting the lift coefficient and angle of attack for stall on airfoils with leading edge or trailing edge flaps

Impact of Richard A. Epstein

Presented at the 2005 Brigham-Kanner Property Rights Conference

Still in Exile? The Current Status of the Contract Clause

The Contract Clause is no longer the subject of much judicial solicitude or academic interest.\u27 Since the 1930s the once potent Contract Clause has been largely relegated to the outer reaches of constitutional law.2 This, of course, was not always the case. On the contrary, throughout the nineteenth century the Contract Clause was one of the most litigated provisions of the Constitution. In 1896, Justice George Shiras astutely commented: No provision of the constitution of the United States has received more frequent consideration by this court than that which provides that no state shall pass any law impairing the obligation of contracts. \u27 A brief survey of the evolution of contract clause jurisprudence helps to put into perspective the current desuetude of the Clause

Earth Observing System (EOS)/Advanced Microwave Sounding Unit-A (AMSU-A) Stress Analysis Report, A1 Module

This addendum reports the structural margins of safety and natural frequency predictions for the design following the EOS AMSU-A1 Mechanical/Structural Subsystem Critical Design Review (CDR), based on a new and more refined finite element model

Earth Observing System (EOS)/Advanced Microwave Sounding Unit-A (AMSU-A) Structural Math Model - A1

This report presents the description for the NASTRAN finite element for the AMSU-A1 module. The purpose of this report is to document the NASTRAN bulk data deck, transmitted under separate cover. The structural Math Model is to be used by the spacecraft contractor for dynamic loads analysis

American Independence and the Law: A Study of Post-Revolutionary South Carolina Legislation

Joseph Brevard, a South Carolina judge, observed in 1814 that the laws of a country form the most instructive portion of its history. Certainly the successive printed collections of state statutes are among the most reliable and readily available sources for early American legal history. While statutes on their face do not reveal the extent to which they proved effective, the fact remains that to a unique degree statute law, as the product of the legislative process, mirrors the considered values and ideals of a society. Yet the legal history of South Carolina, and indeed that of most southern states, remains largely unexplored. This study attempts to fill part of the gap with an analysis of South Carolina statutory law in the immediate post-Revolutionary era, between the British evacuation of Charleston in December of 1782 and the ratification of the Constitution of the United States in 1788. An investigation of the statutes governing the state during these years should furnish some insight into the impact of the Revolution upon the status of the law as well as the functioning of South Carolina society in the Critical Period. These crucial and unsettled years would see Carolinians follow their victory in the Revolution with the restoration of civil government

How Far Does Natural Law Protect Private Property?

This Article first explores the ambiguous relationship between natural law and the rights of property owners in American history. It points out that invocation of natural law principles was frequently conflated with English common law guarantees of property rights in the Revolutionary Era. Reliance on natural law as a source of protection for private property faded during the nineteenth century and was largely rejected in the early twentieth century. The Article then considers the extent to which natural law principles are useful in addressing contemporary issues relating to eminent domain and police power regulation of private property. Taking a skeptical review, it concludes that natural law, standing alone, is largely theoretical and does not appear to offer meaningful guidance to current problems