قراءة كتاب Artificial and Natural Flight
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اللغة: English
الصفحة رقم: 3
reasoned out the best type of a machine even before I commenced a stroke of the work.
I have to thank Mr. Albert T. Thurston for reading the proofs of this work.
H. S. M.
CONTENTS.
| CHAPTER I. | |
| PAGE | |
| Introductory, | 1 |
| CHAPTER II. | |
| Air Currents and the Flight of Birds, | 11 |
| CHAPTER III. | |
| Flying of Kites, | 25 |
| CHAPTER IV. | |
| Principally Relating to Screws, | 31 |
| CHAPTER V. | |
| Experiments with Apparatus Attached to a Rotating Arm—Crystal Palace Experiments, | 62 |
| CHAPTER VI. | |
| Hints as to the Building of Flying Machines—Steering by Means of a Gyroscope, | 77 |
| CHAPTER VII. | |
| The Shape and Efficiency of Aeroplanes—The Action of Aeroplanes and the Power Required Expressed in the Simplest Terms—Some Recent Machines, | 99 |
| CHAPTER VIII. | |
| Balloons, | 120 |
| Appendix I., | 125 |
| Appendix II.— | |
| Recapitulation of Early Experiments—Efficiency of Screw Propellers, Steering, Stability, &c.—The Comparative Value of Different Motors—Engines—Experiments with Small Machines Attached to a Rotating Arm, | 130 |
| Index, | 163 |
INDEX OF ILLUSTRATIONS.
| FIG. | PAGE | |
| 1. | Diagram showing the reduction of the projected horizontal area, | 2 |
| 2. | Professor Langley’s experiments, | 5 |
| 3. | Eagles balancing themselves on an ascending current of air, | 14 |
| 4. | Air currents observed in Mid-Atlantic, | 16 |
| 5. | Glassy streaks in the Bay of Antibes, | 17 |
| 6. | Air currents observed in the Mediterranean, | 18 |
| 7. | The circulation of air produced by a difference in temperature, | 27 |
| 8. | Kite flying, | 29 |
| 9. | Group of screws and other objects used in my experiments, | 32 |
| 10. | Some of the principal screws experimented with, | 32 |
| 11. | The three best screws, | 33 |
| 12. | Apparatus for testing the thrust of screws, | 34 |