zlacker

The 10 pounds trust is used to overcome the airodynamic friction, when the plane is in high speed. Because the "way" around the wing is longer on one side compared to the other this create a lower pressure on one side, and higher on the other. This pressure both lift and push the plane up. If there was zero friction you would hold the plane up with zero thrust ;)

I build this at school, using the same principle: https://no.wikipedia.org/wiki/Sivilingeni%C3%B8r#/media/Fil:...

>>punner+(OP)
See my question here: https://news.ycombinator.com/item?id=22993460

>>punner+(OP)
The problem with this description is that you don't need a fancy shaped wing to fly, a flat board will work. Aerofoils provide better efficiency but are not required.

>>aetern+D6
Don’t agree, unless you only did read the first 1/4 of my comment?

>>punner+ya
I did, but if I use an extremely thin wing with zero aerofoil (a wing made out of credit-cards or flat balsa wood for example), one "way" around the wing is not longer. Why would pressure be different on the top vs. bottom of this flat wing?