The
Lift Equation Answers
- Identify each letter
in the lift equation and list acceptable units for each quantity.
L = lift,
newtons
Cl = lift
coefficient, none
rho = density,
kg/m3
V = velocity,
m/s
A = area,
m2
- Use
Wikipedia
(http://en.wikipedia.org/wiki/Boeing_747), or a search engine, and look up
the Boeing 747. What is its wing area? 511.0
m2 (the following numbers may vary slightly due to model number)
- If the Boeing 747
above is cruising at 940 km/h, the density of the air is 1.20 g/L, and
the lift coefficient is 1, what is the lift ? 20
900 000 newtons
- Use
Wikipedia
(http://en.wikipedia.org/wiki/Boeing_777), or a search engine, to find the
Boeing 777. What is its wing area? 377.7
m2
- If the Boeing 777
is cruising at the same velocity under the same conditions as the 747
above, what is its lift? 15 400 000 newtons
- Look up the DC-8
on Wikipedia
(http://en.wikipedia.org/wiki/DC-8), or use a search engine.
What is its
wing area? 267.9 m2
- What is the DC-8's
cruising velocity? 270 km/h
- If the air density
is 1.26 g/L and the lift coefficient is 1.5, what is the lift of the
DC-8? 1 320 000 newtons
- Find the F/A-18A
Hornet
on Wikipedia
(http://en.wikipedia.org/wiki/F-18), or use a search engine.
What is its
wing area? 37.2 m2
- What is the F/A-18A's
lift while it flies at 700 mph, the air density is 1.31 g/L, and the
lift coefficient is 1.8? 4 610 000 newtons
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