On 1/28/2011 5:04 PM, mikecreid@msn.com wrote:
> This isn't my logic. I noted my source. When an airliner slows to land th=
ey deploy flaps to increase the surface area for more lift. Bernoulli's pri=
nciple states that the higher speed airflow on top creates a low pressure a=
rea and the wing moves upward. The comments here have been interesting but =
the science is well defined. The size of the wings is determined by the lif=
t needed. Lift off speed is a ratio of weight vs. surface area to create th=
e lift.
>
Add to the list, profile of the lifting surface, angle of attack,=20
elevation (higher, the air is less dense), air temperature, runway=20
surface (hard smooth, grass, water, snow, tall grass), and we are=20
assuming a constant weight. Our plane at sea level would need 2000', at=20
7000' elevation and 70 degrees F, required 5200'.
--=20
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