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The Aeronautic Society of New York

war, and on the second gave a most instructive demonstration of the nature of high explosives, with fascinating experiments, entirely clearing away any ideas that the day was near when a small pocketful of dynamite or Maximite would keep the engine of an aeroplane going indefinitely- or any way at all worth considering. Elmer A. Sperry described the uses of the new active form of gyroscope and its possible application to an aeroplane for giving equilibrium, and exhibited and instrument of his own design in action. Professor Herschel C. Parker spoke of the possibilities of the aeroplane in scientific mountaineering and exploration. R. B. Whitman lectured twice on the explosive engine, first telling of the development of ignition, and later describing the action and balance of four-cycle engines. Hugo C. Gibson also lectured on internal combustion engines. A. C. Triaca told the secrets of ballooning, and on a subsequent occasion F. W. White gave a remarkable display of photographs and moving pictures which formed one of the completest lessons possible in ballooning. W. R. Kimball explained the principle of the helicopter. J. N. Williams also lectured on that subject. A. Leo Stevens gave stories of his experiences in the air. E. T. Birdsall told of the relationship between screws on boats and aerial propellers. Thomas A. Hill dealt with the general theory of propellers. R. W. Jamieson told how to "lay out" a propeller of true pitch, and described the method of using his own device. W. J. Hammer narrated the history of the dirigible, and described the early aeroplane of Sir Hiram S. Maxim and told of a ride he had in this machine when propelled over the mile track at Baldwyn's Park, England, in 1892. Frederick Weinburg dealt with the powers and limits of light motors. Carlos de Zafra described modern naval aramaments with a very fine series of pictures. George A Cove told of how he got electricity direct from the rays of the sun, and of the possibilities of wireless transmission of power. Geo. Bold lectured on airships. Dr. S. B. Battey described early efforts at winds on dirigibles. H. Meixner told of the possibilities of an airship crossing the ocean by taking advantage of the trade winds. Dr. Lee de Forest described wireless telegraphy and its applicabilities to aeroplanes. James H. Scarr, who has charge the local weather bureau at New York, told about wind currents and other air phenomena in a most interesting lecture on things an aeroplanist ought to learn about. Lawrence J. Lesh spoke of the methods of testing propellers, and gave experimentse with various model propellers and an electric turntable devised by him for the purpose. Geo. A. Spratt defined the various wings found in nature, and the lesson to be learned from them. These occur to the memory among the many that were given.

Among those who have addressed the Society incidentally have been A. M. Herring, who gave advice on the use of a glider; Glenn H. Curtiss, and Octave Chanute, who, with the Brothers Wright, is numbered among the Societ's honorary members, honored the members at a meeting with remarks based on the results of his long experience. The name of Octave Chanute will ever be linked with that of the late lamented Secretary of the Smithsonian Institution, Samuel P. Langley, and that of Sir Hiram P. Maxim, for to these men we owe more than to all other the placing of the science of aviation on a dignified scientific and engineering basis. Their theoretical and experimental researches and demonstrations laid the foundation and set the example for the host of followers in their footsteps.

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It is certain that in the list of accomplishments and efforts the writer will have forgotten much that has been done. He will have done so inadvertently. He has tried to recall everything. But there will also have been much that he has not known of. It he has left out any name or omitted anything, he wishes here to express his apologies, and to assure those who would thus appear to have been slighted that is has been done entirely through ignorance on his part; that he has compiled this story of the Society's doings simply from memory, and did not have time to communicate with any of the members, which, in fact, it was though could be done for some subsequent volume that would be written by the members themselves. 

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