Final answer:
A fat, curvy airfoil produces more lift due to a greater pressure difference caused by a longer path for airflow over its surface, which is in line with Bernoulli's principle. So, option A is correct.
Step-by-step explanation:
Regarding the characteristics of a fat, curvy airfoil, the correct option is A. This type of airfoil produces more lift. The shape of a fat, curvy airfoil allows for a greater area on the top surface, causing a longer path for airflow, which typically leads to greater pressure differences between the top and bottom of the wing. This pressure difference is the key component in generating lift. These types of airfoils are often found on aircraft designed for slower speeds or for those that need to carry heavy loads, as they can generate lift at lower speeds. Conversely, fat, curvy airfoils often produce more drag due to a larger surface area encountering air resistance.
The increase in lift is that the curvature of the airfoil helps to increase the velocity of the airflow over the top surface, which by Bernoulli's principle, creates a lower pressure area on top of the wing compared to the bottom. The higher pressure on the bottom helps to push the wing upward, generating lift.