Gee, Mr. Z, making paper airplanes are so complicated. Using Bernoulli's Principle of flight - the faster the air moves the less pressure there is. And then, Newton's third law of motion that focuses on "the angle of attack". If that was not enough, Mr. Z, you talk about installing "elevators" on our planes. Why can't you just call them, flaps?
Went Diggin' In Da Doit.
Here is a link to photos I took at the archaeology dig at the Muncy Canal project. Click on the link. Downloading takes about three minutes. http://www.ltsd.k12.pa.us/497970223125916/blank/browse.asp?a=383&BMDRN=2000&BCOB=0&c=52353
Have a great night, folks.
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