The Invisible Hand
Imagine a Piper J-3 Cub parked beside a mighty double-decker Airbus A380. The two airplanes couldn’t be more different, yet both function on the same four principles: thrust, drag, lift, and weight. The 1.2 million pound Airbus just scales them up a thousand times over the 1,200-pound Piper. Each aircraft is designed for its purpose. […]