The distance between the leading and trailing edge of the wing, measured parallel to the normal airflow over the wing, is known as the chord.
- c: This typically represents the chord length of an aircraft wing. The chord length is the distance between the leading edge and the trailing edge of an airfoil (wing cross-section) and is an important parameter in aerodynamics.
- cr: This could represent the root chord, which is the chord length at the wing’s root or base. The root chord is usually the widest chord on the wing.
- ct: This could represent the tip chord, which is the chord length at the wing’s tip. The tip chord is typically narrower than the root chord.
- y: This variable is likely representing the distance along the wing’s span from the root to a particular point. It’s a measure of how far you are from the wing’s root along its length.
- b: This typically represents the wingspan of the aircraft. It’s the distance from one wingtip to the other.