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Flying Machines: Construction and Operation: A Practical Book Which Shows, in Illustrations, Working Plans and Text, How to Build and Navigate the Modern Airship.

  
[title page]
  
PREFACE.
  
IN MEMORIAM.
  
CONTENTS

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EVOLUTION OF TWO-SURFACE FLYING MACHINE. By Octave Chanute.
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CHAPTER II. THEORY, DEVELOPMENT, AND USE.
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CHAPTER III. MECHANICAL BIRD ACTION.
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CHAPTER IV. VARIOUS FORMS OF FLYING MACHINES.
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CHAPTER V. CONSTRUCTING A GLIDING MACHINE.
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CHAPTER VI. LEARNING TO FLY.
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CHAPTER VII. PUTTING ON THE RUDDER.
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CHAPTER VIII. THE REAL FLYING MACHINE.
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CHAPTER IX. SELECTION OF THE MOTOR.
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CHAPTER X. PROPER DIMENSIONS OF MACHINES.
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CHAPTER XI. PLANE AND RUDDER CONTROL.
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CHAPTER XII. HOW TO USE THE MACHINE.
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CHAPTER XIII. PECULIARITIES OF AIRSHIP POWER.
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CHAPTER XIV. ABOUT WIND CURRENTS, ETC.
  
[section]
  
Changes In Wind Currents.
  
How a Bird Meets Currents.
  
Trying to Imitate the Bird.
  
Preserving Longitudinal Balance.
  
The Matter of Lateral Balance.
  
High Winds Threaten Stability.
  
Trouble With Vertical Columns.
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CHAPTER XV. THE ELEMENT OF DANGER.
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CHAPTER XVI. RADICAL CHANGES BEING MADE.
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CHAPTER XVII. SOME OF THE NEW DESIGNS.
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CHAPTER XVIII. DEMAND FOR FLYING MACHINES.
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CHAPTER XIX. LAW OF THE AIRSHIP.
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CHAPTER XX. SOARING FLIGHT. By Octave Chanute.
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CHAPTER XXI. FLYING MACHINES VS. BALLOONS.
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CHAPTER XXII. PROBLEMS OF AERIAL FLIGHT.
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CHAPTER XXIII. AMATEURS MAY USE WRIGHT PATENTS.
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CHAPTER XXIV. HINTS ON PROPELLER CONSTRUCTION.
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CHAPTER XXV. NEW MOTORS AND DEVICES.
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CHAPTER XXVI. MONOPLANES, TRIPLANES, MULTIPLANES.
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CHAPTER XXVII. 1911 AEROPLANE RECORDS.
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CHAPTER XXVIII. GLOSSARY OF AERONAUTICAL TERMS.

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previous sectionCHAPTER XIV. ABOUT WIND CURRENTS, ETC. Flying Machines: Construction and Operation: A Practical Book Which Shows, in Illustrations, Working Plans and Text, How to Build and Navigate the Modern Airship.
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Trouble With Vertical Columns.

Vertical currents—columns of ascending air—are frequently encountered in unexpected places and have more or less tendency, according to their strength, to make it difficult to keep the machine within a reasonable distance from the ground.

These vertical currents are most generally noticeable in the vicinity of steep cliffs, or deep ravines. In such instances they are usually of considerable strength, being caused by the deflection of strong winds blowing against the face of the cliffs. This deflection exerts a back pressure which is felt quite a distance away from the point of origin, so that the vertical current exerts an influence in forcing the machine upward long before the cliff is reached.

previous sectionCHAPTER XIV. ABOUT WIND CURRENTS, ETC. Flying Machines: Construction and Operation: A Practical Book Which Shows, in Illustrations, Working Plans and Text, How to Build and Navigate the Modern Airship.
next section