Downloads & Free Reading Options - Results

This preliminary investigation introduces the use of the Regier number as a flutter constraint criterion for aeroelastic structural optimization. Artificial neural network approximations are used to approximate the flutter criterion requirements as a function of the design Mach number and the parametric variables defining the aspect ratio, center of gravity, taper ratio, mass ratio, and pitch inertia of the wing. The presented approximations are simple enough to be used in the preliminary design stage without a well defined structural model. An example problem for a low-speed, high-aspect-ratio, light-aircraft wing is presented. The example problem is analyzed for the flutter Mach number using doublet lattice aerodynamics and the PK solution method. The use of the Regier number constraint criterion to optimize the example problem for minimum structural mass while maintaining a constant flutter Mach number is demonstrated.

1Raiding with Morgan

By Byron A. Dunn

It is a fictional tale of cavalry actions during the U.S. Civil War, under General John Morgan. (Summary by M. Craun)

2Revolutions of Time

By Jonathan Dunn

The Canitaurs, who believe that the past is the key to the future, and the Zards, who believe that the past is just the past, are at war and each believes that a redeemer will arrive and propel them to victory. What role Jehu, who has been summoned to the island of Daem, will play in stopping these hostilities is unclear but he soon learns that he will determine not just the outcome of the war but the fate of all humanity.

3Glories of Ireland

By Joseph Dunn and Patrick Joseph Lennox

A collection of essays on Ireland compiled by Joseph Dunn and PJ Lennox. As stated in the Preface to the books "...we have been forced to the conclusion that the performances of the Irish race in many fields of endeavor are entirely unknown to most people, and that even to the elect they are not nearly so well known as they deserve to be. Hence there came to us the thought of placing on record, in an accessible, comprehensive, and permanent form, an outline of the whole range of Irish achievement during the last two thousand years." - Summary by KHand