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

Buchanan and the Right to Acquire Property

This article examines the impact of the Supreme Court decision in Buchanan v. Warley (1917) invalidating residential segregation laws as a deprivation of property rights without due process of law. The decision was premised on a strong affirmation of the right to acquire property. The article explores the historical background and contemporary significance of the right to acquire property. It notes that early state constitutions expressly recognized such a right. It points out that the right to acquire found practical expression in hostility to state-conferred monopoly and in the right to follow common occupations, two doctrines which evolved under the due process clause of the Fourteenth Amendment. The article stresses that the right to acquire property, as in Buchanan, serves to protect the interests of the economically disadvantaged, racial minorities, and fledgling entrepreneurs. Although courts continued to invoke the right to acquire property, by the early twentieth century such right was increasingly limited by the spread of occupational licensing and enactment of laws hampering competition in certain businesses. This trend was facilitated by the emergence of New Deal jurisprudence which downplayed the rights of property owners and emphasized judicial deference to the economic judgment of legislators. As judicial review of economic regulations became largely perfunctory, occupational licensing and entry barriers proliferated in the years following World War II. Recently, however, some courts have looked skeptically at laws restricting entry into common occupations. The article concludes that the right to acquire property, although often ignored, retains some vitality