where ดดดดดดดดดดด and ดดดดดดดดดดดดดare the top pressures in Region III at the leading and trailing edges of the plate, respectively. Therefore, ดดดดดดดดดดดดดดด is always bounded between the two definite values, ดดดดดดดดดดดดa nd ดดดดดดดดดดดดดด. In the limit XIII→0 of a very short plate, Eq. (29) gives the same ดดดดดดดดดดดด as Eq. (28).