This link is old. The new one is this: https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/ https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/. I kn

This link is old. The new one is this: https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/ https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/. I know that sometimes old links are gold, but I can't tell if this is really the case.