: Does an airfoil generate more lift in water since water is more dense than air?
Answer : A very perceptive question. Since water is approximately 1,000 times more dense than air, moving the same airfoil through water does generate more lift. It also generates more drag, which is why foils used for lifting in water (such as a hydrofoil boat) use thinner "waterfoils" to generate the lift needed. The "wings" are also quite a bit smaller than an airplane's, since the water is so much denser.
It's never too early to start thinking about your visit to The World's Greatest Aviation Celebration, EAA AirVenture 2006. See highlights of EAA AirVenture 2005 and learn more about the annual EAA convention at www.airventure.org.