|
|
|
|
|||||
|
||||||
From: Gregory Han (no email)
Date: Sat Aug 16 2003 - 06:01:12 EDT
Gregory Han
685 Curtiswood Dr
Key Biscayne FL 33149
305 361 2133
Fax: 305 437 8108
What a great discussion for a trawler BB. I love the proclamations of
all the "experts". It seems that most of the posts were on the right
track except the Bernoulli defenders. So you go to the wonderful web and
seek a real expert discussion.
Take a look at:
http://www.allstar.fiu.edu/aerojava/airflylvl3.htm
Some quotes:
The second description we will call the Popular Explanation which is
based on the Bernoulli principle. The primary advantage of this
description is that it is easy to understand and has been taught for
many years. Because of it's simplicity, it is used to describe lift in
most flight training manuals. This description focuses on the shape of
the wing and prevents one from understanding such important phenomena as
inverted flight, power, ground effect, and the dependence of lift on the
angle of attack of the wing.
The third description, which we are advocating here, we will call the
Physical Description of lift. This description is based primarily on
Newton's laws. The physical description is useful for understanding
flight, and is accessible to all that are curious. Little math is needed
to yield an estimate of many phenomena associated with flight. This
description gives a clear, intuitive understanding of such phenomena as
the power curve, ground effect, and high-speed stalls. However, unlike
the mathematical aerodynamics description, the physical description has
no design or simulation capabilities.
***********
As one can see, the popular explanation, which fixates on the shape of
the wing, may satisfy many but it does not give one the tools to really
understand flight. The physical description of lift is easy to
understand and much more powerful.
>>> Download free spam killer at http://eliminatespam.com
_______________________________________________
http://lists.samurai.com/mailman/listinfo/trawler-world-list
To Unsubscribe send email to
Include the word "Unsubscribe" (and nothing else) in the subject or body of the message.
|