Background Information and Research Avenues
After years of research, including observations of birds, Otto
Lilienthal generated tables of air lift values at varying incidence
angles. The Wright Brothers tested these results by using a bicycle
on which they had attached a horizontal wheel to the front. On each
side (left and right), they placed wing models which allowed them to
test the angle data.
To find more information on these topics, the following web sites
may be of use:
The World Wide Web includes much more information on these topics.
Feel free to use "Google" or your favorite search engine to guide
you in your Internet search.