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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.
 What happens to
lift when the surface area of an airplane's wings is increased?
 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?
 Refer to the above
question. What is the Boeing 747's takeoff weight?
 How many passengers
can the Boeing 747 carry?
 What is the ratio
of the Boeing 747's takeoff weight to its wing area?
 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?
 What is the takeoff
weight of the Boeing 777?
 How many passengers
can the Boeing 777 carry?
 What is the ratio
of the Boeing 777's takeoff weight to its wing area?
 Again, use
Wikipedia
(http://en.wikipedia.org/wiki/DC8),
or a search engine to get information about the DC8 jetliner
. What is its wing area?
 What is the DC8's
takeoff weight?
 How many passengers
can the DC8 carry?
 What is the ratio
of the DC8's takeoff weight to its wing area?
 Find the DC10
on Wikipedia
(http://en.wikipedia.org/wiki/DC10,
or use a search engine
. What is its wing area?
 What is the DC10's
takeoff weight?
 How many passengers
can the DC10 carry?
 What is the ratio
of the DC10's takeoff weight to its wing area?
 If both the Boeing
777 and the DC10 weighed 130,000 kg, which airplane's wings would generate
the most lift?
 Which of the two
planes in the previous question has a greater possible takeoff weight?
 Which two of the
four jet airplanes above have the closest takeoff weight to wing area
ratios?
 Explain the relationships
among lift, takeoff weight, and wing area. You may want to read the
slide called Forces on an Airplane.
 Do you see a relationship
between wing span and passenger number?
 Where are slats
located and how do they affect an airplane's lift?
 Where are the flaps
located?

Related Pages:
Standards
Worksheet
Lesson Index
Aerodynamics Index


