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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. Open the Web page AirPage Index (http://www.pilotportal.com/airpage/) and look up the Boeing 747-100B. 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 the AirPage Index (http://www.pilotportal.com/airpage/) to find the Boeing 777-200. 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. Look up the DC-8-50 in the AirPage Index (http://www.pilotportal.com/airpage/). 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-10-10 in the AirPage Index (http://www.pilotportal.com/airpage/). 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?
Please send any comments to:
Curator: Tom.Benson@grc.nasa.gov
Responsible Official: Kathy.Zona@grc.nasa.gov