Together, they cited information from 23 references. Not Helpful 15 Helpful Namespaces Article Talk. It turns out the side-force magnitude and direction for reverse swing are comparable to those for conventional swing and for both types of swing, the ball follows a parabolic flight path so that most of the movement occurs in the latter part of the flight. An inswinger combined with a yorker can be especially difficult for the batsman to defend against, especially if used as a surprise delivery after a sequence of outswingers. On the rough side of the ball there are scratches and pits in the ball's surface. However, in the following year, when we conducted our wind-tunnel experiments, the whole "mystery" was revealed.
Look for a master class by someone great at swing bowling such as James Anderson or Wasim Akram. The typical way to create swing is to use the seam and the asymmetry of the ball. Yasir Shah may have "woken up the beast" after Steven Smith send-off. Ravindra Mehta , CC BY-NC-SA Like in conventional swing, there is a lateral force created because of the pressure difference but this time the lateral force acts in the opposite reversed direction. Colder air is denser and so may affect the differential forces the ball experiences in flight. I am not sure about this, but what I do know is that once the lacquer is worn off the surface, the natural oils in the leather are released and this helps the polishing process. If the ball is bowled fast enough above 85 mph , the laminar layer goes into a turbulent state before it reaches the seam.