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Size Effects Problems
If so instructed by your teacher, print out a worksheet page for these problems.


Open the slide called Size Effects (with text). Study the labeled diagrams and read the explanation of Size Effects.

 

Boeing 727
  1. What happens to lift when the surface area of an airplane's wings is increased?
  2. Use this Web Page (http://en.wikipedia.org/wiki/Boeing_747), or your favorite search engine, to find information about the Boeing 747. What is its wing area?
  3. Refer to the above question. What is the Boeing 747's takeoff weight?
  4. How many passengers can the Boeing 747 carry?
  5. What is the ratio of the Boeing 747's takeoff weight to its wing area?
  6. Now use this Web Page (http://en.wikipedia.org/wiki/Boeing_777), or a search engine, to to find information about the Boeing 777. What is its wing area?
  7. What is the takeoff weight of the Boeing 777?
  8. How many passengers can the Boeing 777 carry?
  9. What is the ratio of the Boeing 777's takeoff weight to its wing area?
  10. Again, use Wikipedia (http://en.wikipedia.org/wiki/DC-8), or a search engine to get information about the DC-8 jetliner . What is its wing area?
  11. What is the DC-8's takeoff weight?
  12. How many passengers can the DC-8 carry?
  13. What is the ratio of the DC-8's takeoff weight to its wing area?
  14. Find the DC-10 on Wikipedia (http://en.wikipedia.org/wiki/DC-10, or use a search engine . What is its wing area?
  15. What is the DC-10's takeoff weight?
  16. How many passengers can the DC-10 carry?
  17. What is the ratio of the DC-10's takeoff weight to its wing area?
  18. If both the Boeing 777 and the DC-10 weighed 130,000 kg, which airplane's wings would generate the most lift?
  19. Which of the two planes in the previous question has a greater possible takeoff weight?
  20. Which two of the four jet airplanes above have the closest takeoff weight to wing area ratios?
  21. Explain the relationships among lift, takeoff weight, and wing area. You may want to read the slide called Forces on an Airplane.
  22. Do you see a relationship between wing span and passenger number?
  23. Where are slats located and how do they affect an airplane's lift?
  24. Where are the flaps located?

Related Pages:
Standards
Worksheet
Lesson Index
Aerodynamics Index

 

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Editor: Tom Benson
NASA Official: Tom Benson
Last Updated: Thu, Jun 12 04:46:41 PM EDT 2014

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