314 



TRANSPORTA TION 



Collins, How to Fly 



Collins, The Boys' Airplane Book 



WHAT YOU SHOULD AIM TO ACQUIRE FROM 

 THIS STUDY 



1. Something of the early history of air transporta- 

 tion. 



2. An understanding of how balloons and dirigibles 

 float in air. 



3. How heavier-than-air machines rise in air and are 

 propelled through it. 



4. The present value of airplanes as a means of travel 

 and transportation and their possibilities in the fu- 

 ture. 



TEST OF MASTERY OF THE TOPIC 

 In your notebook complete the statements, answer the 

 questions, and comply with the instructions. 



1. The first balloon was built by in 



2. The first dirigible was propelled by a engine. 



3. constructed the first rigid dirigible. 



4. is usually used in constructing the framework of a 



rigid dirigible. 



5. Balloons are able to rise and float in air because they 

 air which weighs than their own weight. 



6. and are the gases commonly used in the 



modern dirigible. 



7. The lightest element known is 



This is not en- 



tirely satisfactory for use in balloons because it is 



8. Another gas, , is obtained from natural gas wells 



in Oklahoma and Texas. 



9. Balloons and dirigibles are controlled by the principle 

 of 



10. A balloon is buoyed up by a force equal to the 



of displaced. 



11. What are the three types of dirigibles? 



12. discovered the principle of buoyancy. 



13. Airplanes are (heavier, lighter) than air. 



14. The first airplane flight was accomplished in _ 

 _ at _ 



by 



15. Write a paragraph explaining how the airplane wing 

 is constructed to enable the plane to lift. 



16. When an airplane is in flight the air currents create 



a below the wing and a above the wing which 



enable the plane to lift. 



17. Streamlining means 



18. Tell the part played by each of the following in con- 

 trolling an airplane: rudder, aileron, rudder bar, vertical 

 fin, elevator, control stick. 



19. Explain how the aviator can accomplish the following : 

 nose the plane up, bank the plane, nose the plane down. 



20. What is the difference between the helicopter and the 

 autogyro ? 



21. Write a statement of your views on air travel as the 

 transportation of the future. 



U-S. DEPARTMENT OF COMMERCE 



BUREAU OF .VIII COMMERCE 



AIRWAY MAP OF THE UNITED STATES 



Courtesy U. S. Department of Commerce, Bureau of A\r Commerce 



FIG. 529. AIRWAY MAP OF THE UNITED STATES 



