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Laurence Yard Smith. The Romance of Aircraft
The Romance of Aircraft
Table of Contents
CHAPTER I. The Conquest of the Air
CHAPTER II “A B C's” of a Balloon
CHAPTER III. Early Balloon Adventures
CHAPTER IV. The Parachute
CHAPTER V. Ballooning in the Great War
CHAPTER I. Development of the Dirigible
CHAPTER II. Forerunners of the Allied Dirigibles
CHAPTER III. Dirigibles in the World War
CHAPTER I. Early Experiments with Heavier-than-Air Machines
CHAPTER II. First Principles of an Airplane
CHAPTER III. The Pioneers
CHAPTER IV. The Airplane in the World War
CHAPTER V. Some of the Problems the Inventors Had to Solve
CHAPTER VI. Famous Allied Airplanes
CHAPTER VII. German Airplanes in the World War
CHAPTER VIII. Heroes of the Air
CHAPTER IX. The Birth of an Airplane
CHAPTER X. The Training of an Aviator
CHAPTER XI. The Future Story of the Air
READING LIST
INDEX
Отрывок из книги
Laurence Yard Smith
Published by Good Press, 2021
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Now all this applies just as well to a body in the atmosphere as it does to the body immersed in water. The air in this case corresponds to the liquid. Therefore any object placed in the air which weighs less in proportion to its volume than the atmosphere, is bound to rise. Every object we see about us, including ourselves, which is not fastened down to earth, would, if it were not “heavier than air,” go flying off toward the skies.
Imagine a balloon all ready to be inflated, that is, ready to be filled with gas. The bag or “envelope” hangs limp and lifeless. Together with the basket, ropes, etc., which are attached to it, it probably weighs several hundred pounds, yet because its volume is so small it displaces very little air. Now we commence to inflate the balloon. As the gas rushes in, the envelope commences to swell; it grows larger and larger, displacing a greater volume of air every moment. When fully inflated it displaces a volume of air much greater in weight than itself. This weight of displaced air acts upon it with a resistless upward force, sufficient to lift it into the clouds. The moment its straining bonds are loosed, it rises with great velocity.
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