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/DC-8),
or a search engine to get information about the DC-8 jetliner
. What is its wing area?
- What is the DC-8's
takeoff weight?
- How many passengers
can the DC-8 carry?
- What is the ratio
of the DC-8's takeoff weight to its wing area?
- Find the DC-10
on Wikipedia
(http://en.wikipedia.org/wiki/DC-10,
or use a search engine
. What is its wing area?
- What is the DC-10's
takeoff weight?
- How many passengers
can the DC-10 carry?
- What is the ratio
of the DC-10's takeoff weight to its wing area?
- If both the Boeing
777 and the DC-10 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?
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