University of Virginia Library

Search this document 
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

expand section1. 
EVOLUTION OF TWO-SURFACE FLYING MACHINE. By Octave Chanute.
expand section2. 
CHAPTER II. THEORY, DEVELOPMENT, AND USE.
expand section3. 
CHAPTER III. MECHANICAL BIRD ACTION.
expand section4. 
CHAPTER IV. VARIOUS FORMS OF FLYING MACHINES.
expand section5. 
CHAPTER V. CONSTRUCTING A GLIDING MACHINE.
expand section6. 
CHAPTER VI. LEARNING TO FLY.
expand section7. 
CHAPTER VII. PUTTING ON THE RUDDER.
expand section8. 
CHAPTER VIII. THE REAL FLYING MACHINE.
collapse section9. 
CHAPTER IX. SELECTION OF THE MOTOR.
  
[section]
  
Average Weight Per Horse Power.
  
How Lightness Is Secured.
  
Multiplicity of Cylinders.
  
Horse Power and Speed.
  
Great Waste of Power.
  
What the Propeller Does.
  
Kinds of Propellers Used.
  
Placing of the Motor.
  
No Perfect Motor as Yet.
  
Features of Darracq Motor.
  
Propeller Thrust Important.
  
Designs for Propeller Blades.
  
Difference in Propeller Efficiency.
  
Comparison of Two Designs.
  
Experts Fail to Agree.
expand section10. 
CHAPTER X. PROPER DIMENSIONS OF MACHINES.
expand section11. 
CHAPTER XI. PLANE AND RUDDER CONTROL.
expand section12. 
CHAPTER XII. HOW TO USE THE MACHINE.
expand section13. 
CHAPTER XIII. PECULIARITIES OF AIRSHIP POWER.
expand section14. 
CHAPTER XIV. ABOUT WIND CURRENTS, ETC.
expand section15. 
CHAPTER XV. THE ELEMENT OF DANGER.
expand section16. 
CHAPTER XVI. RADICAL CHANGES BEING MADE.
expand section17. 
CHAPTER XVII. SOME OF THE NEW DESIGNS.
expand section18. 
CHAPTER XVIII. DEMAND FOR FLYING MACHINES.
expand section19. 
CHAPTER XIX. LAW OF THE AIRSHIP.
expand section20. 
CHAPTER XX. SOARING FLIGHT. By Octave Chanute.
expand section21. 
CHAPTER XXI. FLYING MACHINES VS. BALLOONS.
expand section22. 
CHAPTER XXII. PROBLEMS OF AERIAL FLIGHT.
expand section23. 
CHAPTER XXIII. AMATEURS MAY USE WRIGHT PATENTS.
expand section24. 
CHAPTER XXIV. HINTS ON PROPELLER CONSTRUCTION.
expand section25. 
CHAPTER XXV. NEW MOTORS AND DEVICES.
expand section26. 
CHAPTER XXVI. MONOPLANES, TRIPLANES, MULTIPLANES.
expand section27. 
CHAPTER XXVII. 1911 AEROPLANE RECORDS.
 28. 
CHAPTER XXVIII. GLOSSARY OF AERONAUTICAL TERMS.

collapse section Collapse All | Expand All expand section
previous sectionCHAPTER IX. SELECTION OF THE MOTOR. 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

Comparison of Two Designs.

On the Wright machine two wooden propellers of two blades each (each blade having a decided "twist") are used. As one 25 horsepower motor drives both propellers

illustration

A Three-Bladed Propeller.

[Description: Black and white illustration: Three-blade propeller.]
the engine energy amounts to just one-half of this for each, or 12 1/2 horsepower. And this energy is utilized at one-half the normal engine speed.

On the Voisin a radically different system is employed. Here we have one metal two-bladed propeller with a very slight "twist" to the blade surfaces. The full energy of a 50-horsepower motor is utilized.

previous sectionCHAPTER IX. SELECTION OF THE MOTOR. 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