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Size
Effects
Answers
 What happens to
lift when the surface area of an airplane's wings is increased? Increases
 Use this
Web Page
(http://en.wikipedia.org/wiki/Boeing_747),
or a search engine to find information on the
Boeing 747.
What is its wing area? 511
m^{2} (following numbers may vary slightly because of model number)
 Refer to the above
question. What is the Boeing 747's takeoff weight? 322
050 kg
 How many passengers
can the Boeing 747 carry? 452
 What is the ratio
of the Boeing 747's takeoff weight to its wing area? 630
kg/m^{2}
 Now use this
Web Page
(http://en.wikipedia.org/wiki/Boeing_777),
or a search engine,
to find information on the Boeing 777.
What is its wing area? 377.7 m^{2
}
 What is the takeoff
weight of the Boeing 777? 229 480 kg
 How many passengers
can the Boeing 777 carry? 375
 What is the ratio
of the Boeing 777's takeoff weight to its wing area? 607
kg/m^{2}
 Again use
Wikipedia
(http://en.wikipedia.org/wiki/DC8)
or a search engine to find information on the DC8 jetliner
. What is its wing area? 267.9
m^{2}
 What is the DC8's
takeoff weight? 147 417 kg
 How many passengers
can the DC8 carry? 159
 What is the ratio
of the DC8's takeoff weight to its wing area? 550
kg/m^{2}
 Find the DC10
on Wikipedia
(http://en.wikipedia.org/wiki/DC10)
or a search engine
. What is its wing area? 329.8
m^{2}
 What is the DC10's
takeoff weight? 199 580 kg
 How many passengers
can the DC10 carry? 380
 What is the ratio
of the DC10's takeoff weight to its wing area? 605
kg/m^{2}
 If both the Boeing
777 and the DC10 weighed 130,000 kg, which airplane's wings would generate
the most lift? 777
 Which of the two
planes in the previous question has a greater possible takeoff weight?
777
 Which two of the
four jet airplanes above have the closest takeoff weight to wing area
ratios? 777 and DC10
 Explain the relationships
among lift, takeoff weight, and wing area. You may want to read the
slide called Forces on an Airplane.
Lift increases with wing area, and lift
must exceed weight for takeoff.
 Do you see a relationship
between wing span and passenger number? As
wing area increases, passenger number increases.
 Where are slats
located and how do they affect an airplane's lift? Front
of wings; answers will vary.
 Where are the flaps
located? Back of wing near fuselage; answers
will vary.

Related Pages:
Standards
Activity
Worksheet
Lesson Index
Aerodynamics Index


