A Monograph on the Mechanics and Equilibrium of Kites (Classic Reprint)

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Excerpt from A Monograph on the Mechanics and Equilibrium of Kites A monograph prepared by C. F. Marvin, Professor of Meteorology, U. S. Weather Bureau, submitted with the approval of Prof. Willis L. Moore, Chief of Weather Bureau, in competition for the "Chanute Prize" offered by the Boston Aeronautical Society. ANNOUNCEMENT OF PRIZE. Octave Chanute, Esq., ex-president of the American Society of Civil Engineers, generously offers the prize herein described. Under date of May 27, 1896, he writes to the 8ociety as follows: "I herewith enclose $100, and authorize the Boston Aeronautical Society to offer this sum as a special prize for the best monograph on the kite, giving a full theory of its mechanics and stability, with quantitative computations appended. "This prize to be awarded by judges appointed by the Society. It may be withheld one year in case no sufficiently complete monograph is handed in. "To explain the latter reservation, it may be suggested that the fol-lowing pointa need consideration: "1. Tne resolution of all the forces acting upon an ordinary kite with a tail, i. e., the wind pressure upon its surface, its tail, and its string, and the weight (gravity) of these various parts. The resulting equilibrium, or the diving, spinning round, or glancing sideways, and how the forces act which restore the balance. State the position of the center of gravity, center of pressure, and beat point of attachment for the string with numerical example. "2. Give the same elements for the tailless kite, distinguishing between the Malay, the Japanese or Chinese, the Bi-polar, the Hargrave, and the Fin (Boynton) kites. Indicate also what are the general principles upon which each group of the tailless kites depends for its sta- What effect is produced by changes in the point of attachment of the string, and what is the pull thereon with various positions and with various strengths of wind. "4. What is the difference in effect between the kite string and the attraction of gravity on the mass of a soaring bird. "Sincerely your, O. Chanute." Competitors for this prize are requested to have their essays typewritten, and to send them in on or before November 15, 1896. Address Secretary of the Boston Aeronautical Society, P. O. Box 1197. Boston, Mass., U. S. A. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.